Italy passes renewable energy legislation

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Italy's Council of Ministries approved a legislative decree setting the instruments, mechanisms and incentives, as well as the institutional, financial and legal framework required for the achievement of the 17 quota of renewable energy required in the country by 2020, as established by European Union directive 2009/28/CE.

In general, the decree establishes modifications on the permitting procedures and foresees a new incentives system for renewable sources of energy that begin operations after January 1, 2013. While the legislation makes differences for smaller and larger facilities, the main issue within the decree is the regulation of photovoltaic facilities, which is aimed to limit the construction of these facilities for speculative reasons and to help ensure long-term development in the sector.

The most relevant measures include:

• a new incentives scheme for photovoltaic PV facilities connected to the grid after May 31, 2011. This incentives system will be defined by April 30.

• Photovoltaic facilities with an installed capacity of more than 1 megawatt MW on agricultural lands will be excluded from federal incentives.

• Photovoltaic facilities on agricultural lands with installed capacity less than or equal to 1 MW will be included in the incentives scheme, as long as the area for construction does not exceed 10 of the area owned by the developer. This restriction vanishes if the lands are idle for more than five years.

The decree is an attempt to bring order to this sector, which exploded last year, moving from 1,142 MW at the end of 2009 to 7,000 MW by the end of 2010. This boom was experienced throughout Europe, with a 115 increase in photovoltaic facilities on the continent, reaching 25 gigawatts of generating capacity. This can be explained by overly generous incentive schemes, forcing the major players in the European photovoltaic market Germany, Spain and France to review and reduce their incentives systems.

In Italy, regional governments also tried to control and regulate renewable energy development in their territories. For example, Sardinia changed the regulation of renewable energy production in March 2010 by banning offshore windfarms, monopolizing the development of onshore windfarms through an ad-hoc state company, and changing the permitting procedures and limiting the installation of solar photovoltaic facilities on farmland. The Northern region of Veneto, which is establishing a new regional energy plan, has blocked all regional authorizations for photovoltaic facilities larger than 0.2 MW on agricultural lands and biomass or biofuel-fired facilities larger than 0.5 MW and 1 MW, respectively, until the approval of the plan.

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Canadian nuclear projects bring economic benefits

Ontario Nuclear Refurbishment Economic Impact powers growth as Bruce Power's MCR and OPG's Darlington unit 2 refurbishment drive jobs, supply-chain spending, medical isotopes, clean baseload power, and lower GHG emissions across Ontario and Canada.

 

Key Points

It is the measured gains from Bruce Power's MCR and OPG's Darlington refurbishment in jobs, taxes, and clean energy.

✅ CAD7.6B-10.6B impact in Ontario; CAD8.1B-11.6B nationwide.

✅ Supports 60% nuclear supply, jobs, and medical isotopes.

✅ MCR and Darlington cut GHGs, drive innovation and supply chains.

 

The 13-year Major Component Replacement (MCR) project being undertaken as part of Bruce Power's life-extension programme, which officially began with a reactor taken offline earlier this year, will inject billions of dollars into Ontario's economy, a new report has found. Meanwhile, the major project to refurbish Darlington unit 2 remains on track for completion in 2020, Ontario Power Generation (OPG) has announced.

The Ontario Chamber of Commerce (OCC) said its report, Major Component Replacement Project Economic Impact Analysis, outlines an impartial assessment of the MCR programme and related manufacturing contracts across the supply chain. The report was commissioned by Bruce Power.

"Our analysis shows that Bruce Power's MCR project is a fundamental contributor to the Ontario economy. More broadly, the life-extension of the Bruce Power facility will provide quality jobs for Ontarians, produce a stable supply of medical isotopes for the world's healthcare system, and deliver economic benefit through direct and indirect spending," OCC President and CEO Rocco Rossi said."As Ontario's energy demand grows, nuclear truly is the best option to meet those demands with reduced GHG [greenhouse gas] emissions. The Bruce Power MCR Project will not only drive economic growth in the region, it will position Ontario as a global leader in nuclear innovation and expertise."

According to the OCC's economic analysis, the MCR's economic impact on Ontario is estimated to be between CAD7.6 billion (USD5.6 billion) and CAD10.6 billion. Nationally, its economic impact is estimated to be between CAD8.1 billion and CAD11.6 billion. It estimates that the federal government will receive CAD144 million in excise tax and CAD1.2 billion in income tax, while the provincial government will receive CAD300 million and CAD437 million. Ontario’s municipal governments are estimated to receive a collective CAD192 million in tax.

The nuclear industry currently provides 60% of Ontario’s daily energy supply needs, with Pickering life extension plans bolstering system reliability, and is made up of over 200 companies and more than 60,000 jobs across a diversity of sectors such as operations, manufacturing, skilled trades, healthcare, and research and innovation, the report notes.

Greg Rickford, Ontario's minister of Energy, Northern Development and Mines, and minister of Indigenous Affairs, said continued use of the Bruce generating station which recently set an operating record would create jobs and advance Ontario’s nuclear industrial sector. "It is great to see projects like the MCR that help make Ontario the best place to invest, do business and find a job," he said.

The MCR is part of Bruce Power's overall life-extension programme, which started in January 2016. Bruce 6 will be the first of the six Candu units to undergo an MCR which will take 46 months to complete and give the unit a further 30-35 years of operational life. The total cost of refurbishing Bruce units 3-8 is estimated at about CAD8 billion, in addition to CAD5 billion on other activities under the life-extension programme, which is scheduled for completion by 2053.

 

Darlington milestones

OPG's long-term refurbishment programme at Darlington, alongside SMR plans for the site announced by the province, began with unit 2 in 2016 after years of detailed planning and preparation. Reassembly of the reactor, which was disassembled last year, is scheduled for completion this spring, and the unit 2 refurbishment project remains on track for completion in early 2020. At the same time, final preparations are under way for the start of the refurbishment of unit 3.

"We've entered a critical phase on the project," Senior Vice President of Nuclear Refurbishment Mike Allen said. "OPG and our project partners continue to work as an integrated team to meet our commitments on Unit 2 and our other three reactors at Darlington Nuclear Generating Station."

A 350-tonne generator stator manufactured by GE in Poland is currently in transit to Canada, where it will be installed in Darlington 3's turbine hall as the province also breaks ground on its first SMR this year.

The 10-year Darlington refurbishment is due to be completed in 2026, while the province plans to refurbish Pickering B to extend output beyond that date.

 

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Northvolt Affirms Continuation of EV Battery Plant Project Near Montreal

Northvolt Montreal EV Battery Plant advances as a Quebec clean energy hub, leveraging hydroelectric power to supply EV batteries, strengthen North American supply chains, and support automakers' electrification with sustainable manufacturing and regional distribution.

 

Key Points

A Quebec-based EV battery facility using hydroelectric power to scale sustainable production for North America.

✅ Powered by Quebec hydro for lower-carbon cell manufacturing

✅ Strengthens North American EV supply chain resilience

✅ Creates local jobs, R&D, and advanced manufacturing skills

 

Northvolt, a prominent player in the electric vehicle (EV) battery industry, has reaffirmed its commitment to proceed with its battery plant project near Montreal as originally planned. This development marks a significant step forward in Northvolt's expansion strategy and signals confidence in Canada's role in the global EV market.

The decision to move forward with the EV battery plant project near Montreal underscores Northvolt's strategic vision to establish a strong foothold in North America's burgeoning electric vehicle sector. The plant is poised to play a crucial role in meeting the growing demand for sustainable battery solutions as automakers accelerate their transition towards electrification.

Located strategically in Quebec, a province known for its abundant hydroelectric power and supportive government policies towards clean energy initiatives, including major Canada-Quebec investments in battery assembly, the battery plant project aligns with Canada's commitment to promoting green technology and reducing carbon emissions. By leveraging Quebec's renewable energy resources, Northvolt aims to produce batteries with a lower carbon footprint compared to traditional manufacturing processes.

The EV battery plant is expected to contribute significantly to the local economy by creating jobs, stimulating economic growth, and fostering technological innovation in the region, much as a Niagara Region battery plant is catalyzing development in Ontario. As Northvolt progresses with its plans, collaboration with local stakeholders, including government agencies, educational institutions, and industry partners, will be pivotal in ensuring the project's success and maximizing its positive impact on the community.

Northvolt's decision to advance the battery plant project near Montreal also reflects broader trends in the global battery manufacturing landscape. With increasing emphasis on sustainability and supply chain resilience, companies like Northvolt are investing in diversified production capabilities, including projects such as a $1B B.C. battery plant, to meet regional market demands and reduce dependency on overseas suppliers.

Moreover, the EV battery plant project near Montreal represents a milestone in Canada's efforts to strengthen its position in the global electric vehicle supply chain, with EV assembly deals helping put the country in the race. By attracting investments from leading companies like Northvolt, Canada aims to build a robust ecosystem for electric vehicle manufacturing and innovation, driving economic competitiveness and environmental stewardship.

The plant's proximity to key markets in North America further enhances its strategic value, enabling efficient distribution of batteries to automotive manufacturers across the continent. This geographical advantage positions Northvolt to capitalize on the growing demand for electric vehicles in Canada, the United States, and beyond, supporting Canada-U.S. collaboration on supply chains and market growth.

Looking ahead, Northvolt's commitment to advancing the EV battery plant project near Montreal underscores its long-term vision and dedication to sustainable development. As the global electric vehicle market continues to evolve, alongside the U.S. auto sector's pivot to EVs, investments in battery manufacturing infrastructure will play a critical role in shaping the industry's future landscape and accelerating the adoption of clean transportation technologies.

In conclusion, Northvolt's affirmation to proceed with the EV battery plant project near Montreal represents a significant milestone in Canada's transition towards sustainable mobility solutions. By harnessing Quebec's renewable energy resources and fostering local partnerships, Northvolt aims to establish a state-of-the-art manufacturing facility that not only supports the growth of the electric vehicle sector but also contributes to Canada's leadership in clean technology innovation, bolstered by initiatives like Nova Scotia vehicle-to-grid pilots that strengthen grid readiness nationwide. As the project moves forward, its impact on economic growth, job creation, and environmental sustainability is expected to resonate positively both locally and globally.

 

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Ontario Drops Starlink Deal, Eyes Energy Independence

Ontario Starlink Contract Cancellation underscores rising tariffs, trade tensions, and retaliation, as SpaceX's Elon Musk loses a rural broadband deal; Ontario pivots to procurement bans, energy resilience, and nuclear power to boost grid independence.

 

Key Points

Ontario ended a C$100M Starlink deal over U.S. tariffs, prompting a shift to rural broadband alternatives.

✅ Triggered by U.S. tariffs; Ontario adopts retaliatory procurement bans.

✅ Ends plan to connect 15,000 rural homes and businesses with broadband.

✅ Signals push for energy resilience, nuclear power, and grid independence.

 

In a decisive move, Ontario Premier Doug Ford announced the cancellation of a C$100 million contract with Elon Musk's Starlink, a subsidiary of SpaceX, in direct response to U.S. President Donald Trump's imposition of tariffs on Canadian imports. This action underscores the escalating trade tensions between Canada and the United States, a theme highlighted during Ford's Washington meeting on energy tariffs earlier this month, and highlights Ontario's efforts to safeguard its economic interests.

The now-terminated agreement, established in November, aimed to provide high-speed internet access to 15,000 homes and businesses in Ontario's remote areas. Premier Ford's decision to "rip up" the contract signifies a broader strategy to distance the province from U.S.-based companies amid the current trade dispute. He emphasized, "Ontario won't do business with people hell-bent on destroying our economy."

This move is part of a series of retaliatory measures by Canadian provinces, including Ford's threat to cut electricity exports to the U.S., following President Trump's announcement of a 25% tariff on nearly all Canadian imports, excluding oil, which faces a 10% surcharge. These tariffs, set to take effect imminently, have prompted concerns about potential economic downturns in Canada. In response, Prime Minister Justin Trudeau declared that Canada would impose 25% tariffs on C$155 billion worth of U.S. goods, aiming to exert pressure on the U.S. administration to reconsider its stance.

Premier Ford's actions reflect a broader sentiment of economic nationalism, as he also announced a ban on American companies from provincial contracts until the U.S. tariffs are lifted. He highlighted that Ontario's government and its agencies allocate $30 billion annually on procurement, and reiterated his earlier vow to fire the Hydro One CEO and board as part of broader reforms aimed at efficiency.

The cancellation of the Starlink contract raises concerns about the future of internet connectivity in Ontario's rural regions. The original deal with Starlink was seen as a significant step toward bridging the digital divide, offering high-speed internet to underserved communities. With the contract's termination, the province faces the challenge of identifying alternative solutions to fulfill this critical need.

Beyond the immediate implications of the Starlink contract cancellation, Ontario is confronting broader challenges in ensuring the resilience and independence of its energy infrastructure. The province's reliance on external entities for critical services, such as internet connectivity and energy, has come under scrutiny, as Canada's electricity exports are at risk amid ongoing trade tensions and policy uncertainty.

Premier Ford has expressed a commitment to expanding Ontario's capacity to generate nuclear power as a means to bolster energy self-sufficiency. While this strategy aims to reduce dependence on external energy sources, it presents its own set of challenges that critics argue require cleaning up Ontario's hydro mess before new commitments proceed. Developing nuclear infrastructure requires substantial investment, rigorous safety protocols, and long-term planning. Moreover, the integration of nuclear power into the province's energy mix necessitates careful consideration of environmental impacts and public acceptance.

The concept of "Trump-proofing" Ontario's electricity grid involves creating a robust and self-reliant energy system capable of withstanding external political and economic pressures. Achieving this goal entails diversifying energy sources, including building on Ontario's electricity deal with Quebec to strengthen interties, investing in renewable energy technologies, and enhancing grid infrastructure to ensure stability and resilience.

However, the path to energy independence is fraught with complexities. Balancing the immediate need for reliable energy with long-term sustainability goals requires nuanced policy decisions, including Ontario's Supreme Court challenge to the global adjustment fee and related regulatory reviews to clarify cost impacts. Additionally, fostering collaboration between government entities, private sector stakeholders, and the public is essential to navigate the multifaceted challenges associated with overhauling the province's energy framework.

Ontario's recent actions, including the cancellation of the Starlink contract, underscore the province's proactive stance in safeguarding its economic and infrastructural interests amid evolving geopolitical dynamics. While such measures reflect a commitment to self-reliance, they also highlight the intricate challenges inherent in reducing dependence on external entities. As Ontario charts its course toward a more autonomous future, strategic planning, investment in sustainable technologies, and collaborative policymaking will be pivotal in achieving long-term resilience and prosperity.

 

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Alberta shift from coal to cleaner energy

Alberta Coal-to-Gas Transition will retire coal units, convert plants to natural gas, boost renewables, and affect electricity prices, with policy tools like a price cap and carbon tax shaping the power market.

 

Key Points

Shift retiring coal units and converting to natural gas and renewables, targeting coal elimination by 2030.

✅ TransAlta retires Sundance coal unit; more units convert to gas.

✅ Forward prices seen near $40 to low $50/MWh in 2018.

✅ 6.8-cent cap shields consumers; carbon tax backstops costs.

 

The turn of the calendar to 2018 saw TransAlta retire one of its coal power generating units at its Sundance plant west of Edmonton and mothball another as it begins the transition to cleaner sources of energy across Alberta.

The company will say goodbye to three more units over the next year and a half to prepare them for conversion to natural gas.

This is part of a fundamental shift in Alberta, which will see coal power retired ahead of schedule by 2030, replaced by a mix of natural gas and renewable sources.

“We’re going to see that transition continue right up from now until 2030, and likely beyond 2030 as wind generation starts to outpace coal and new technologies become available.”

Coal has long been the backbone of Alberta’s grid, currently providing nearly 40 per cent of the provinces power. Analysts believe removing it will come with a cost to consumers, according to a report on coal phase-out costs published recently.

“The open question over the next couple of years is whether they’re going to inch up gradually, or whether they’re going to inch up like they did in 2012 and 2013, by having periods of very high power prices.”

Albertans are currently paying historically low power prices, with generation costs last year averaging below $23/MWh, less than half of the average of the past 10 years.

A report released in mid-December by electricity consultant firm EDC Associates showed forward prices moving from the $40/MWh in the first three months of 2018, to the low $50/MWh range.

“The forwards tend to take several weeks to fully react to announcements, so its anticipated that prices will continue to gradually track upwards over the coming weeks,” the report reads.

The NDP government has taken steps to protect consumers against price surges. Last spring, a price cap of 6.8 cents/MWh was put in place until the spring of 2021, with any cost above that to be covered by carbon tax revenue.

 

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Nova Scotia Premier calls on regulators to reject 14% electricity rate hike agreement

Nova Scotia Power Rate Increase Settlement faces UARB scrutiny as regulators weigh electricity rates, fuel costs, storm rider provisions, Bill 212 limits, and Muskrat Falls impacts on ratepayers and affordability for residential and industrial customers.

 

Key Points

A deal proposing 13.8% electricity hikes for 2023-2024, before the UARB, covering fuel costs, a storm rider, and Bill 212.

✅ UARB review may set different rates than the settlement

✅ Fuel cost prepayment and hedging incentives questioned

✅ Storm rider shifts climate risk onto ratepayers

 

Nova Scotia Premier Tim Houston is calling on provincial regulators to reject a settlement agreement between Nova Scotia Power and customer groups that would see electricity rates rise by nearly 14% electricity rate hike over the next two years.

"It is our shared responsibility to protect ratepayers and I can't state strongly enough how concerned I am that the agreement before you does not do that," Houston wrote in a letter to the Nova Scotia Utility and Review Board late Monday.

Houston urged the three-member panel to "set the agreement aside and reach its own conclusion on the aforementioned application."

"I do not believe, based on what I know, that the proposed agreement is in the best interest of ratepayers," he said.

The letter does not spell out what his Progressive Conservative government would do if the board accepts the settlement reached last week between Nova Scotia Power and lawyers representing residential, small business and large industrial customer classes.

Other groups also endorsed the deal, although Nova Scotia Power's biggest customer — Port Hawkesbury Paper — did not sign on.

'We're protecting the ratepayers'
Natural Resources Minister Tory Rushton said the province was not part of the negotiations leading up to the settlement.

"As a government or department we had no intel on those conversations that were taking place," he said Tuesday. "So, we saw the information the same as the public did late last week, and right now we're protecting the ratepayers of Nova Scotia, even though the province cannot order Nova Scotia Power to lower rates under current law. We want to make sure that that voice is still heard at the UARB level."

Rushton said he didn't want to presuppose what the UARB will say.

"But I think the premier's been very loud and clear and I believe I have been, too. The ratepayers are at the top of our mind. We have different tools at our [disposal] and we'll certainly do what we can and need to [do] to protect those ratepayers."


The settlement agreement
If approved by regulators, rates would rise by 6.9 per cent in 2023 and 6.9 per cent in 2024 — almost the same amount on the table when hearings before the review board ended in September.

The Houston government later intervened with legislation, known as Bill 212, that capped rates to cover non-fuel costs by 1.8 per cent. It did not cap rates to cover fuel costs or energy efficiency programs.

In a statement announcing the agreement, Nova Scotia Power president Peter Gregg claimed the settlement adhered "to the direction provided by the provincial government through Bill 212."

Consumer advocate Bill Mahody, representing residential customers, told CBC News the proposed 13.8 per cent increase was "a reasonable rate increase given the revenue requirement that was testified to at the hearing."

Settlement 'remarkably' similar to NSP application
The premier disagrees, noting that the settlement and rate application that triggered the rate cap are "remarkably consistent."

He objects to the increased amount of fuel costs rolled into rates next year before the annual true up of actual fuel costs, which are automatically passed on to ratepayers.

"If Nova Scotia Power is effectively paid in advance, what motive do they have to hedge and mitigate the adjustment eventually required," Houston asked in his letter.

He also objected to the inclusion of a storm rider in rates to cover extreme weather, which he said pushed the risk of climate change on to ratepayers.

Premier second-guesses Muskrat Falls approval
Houston also second-guessed the board for approving Nova Scotia Power's participation in the Muskrat Falls hydro project in Labrador.

"The fact that Nova Scotians have paid over $500 million for this project with minimal benefit, and no one has been held accountable, is wrong," he said. "It was this board of the day that approved the contracts and entered the final project into rates."

Ratepayers are committed to paying $1.7 billion for the Maritime Link to bring the green source of electricity into the province, while rate mitigation talks in Newfoundland lack public details for their customers.

Although the Maritime Link was built on time and on budget by an affiliated company, only a fraction of Muskrat Falls hydro has been delivered because of ongoing problems in Newfoundland, including an 18% electricity rate hike deemed unacceptable by the province's consumer advocate.

"I find it remarkable that those contracts did not include different risk sharing mechanisms; they should have had provisions for issues in oversight of project management. Nevertheless, it was approved, and is causing significant harm to ratepayers in the form of increased rates."

Houston notes that because of non-delivery from Muskrat Falls, Nova Scotia Power has been forced to buy much more expensive coal to burn to generate electricity.


Opposition reaction
Opposition parties in Nova Scotia reacted to Houston's letter.

NDP Leader Claudia Chender dismissed it as bluster.

"It exposes his Bill 212 as not really helping Nova Scotians in the way that he said it would," she said. "Nothing in the settlement agreement contravenes that bill. But it seems that he's upset that he's been found out. And so here we are with another intervention in an independent regulatory body."

Liberal Leader Zach Churchill said the government should intervene to help ratepayers directly.

"We just think that it makes more sense to do that directly by supporting ratepayers through heating assistance, lump-sum electricity credits, rebate programs and expanding the eligibility for that or to provide funding directly to ratepayers instead of intervening in the energy market in this way," he said.

The premier's office said that no one was available when asked about an interview on Tuesday.

"The letter speaks for itself," the office responded.

Nova Scotia Power issued a statement Tuesday. It did not directly address Houston's claims.

"The settlement agreement is now with the NS Utility and Review Board," the utility said.

"The UARB process is designed to ensure customers are represented with strong advocates and independent oversight. The UARB will determine whether the settlement results in just and reasonable rates and is in the public interest."

 

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Cheap material converts heat to electricity

Polycrystalline Tin Selenide Thermoelectrics enable waste heat recovery with ZT 3.1, matching single crystals while cutting costs, powering greener car engines, industrial furnaces, and thermoelectric generators via p-type and emerging n-type designs.

 

Key Points

Low-cost tin selenide devices that turn waste heat into power, achieving ZT 3.1 and enabling p-type and n-type modules.

✅ Oxygen removal prevents heat-leaking tin oxide grain skins.

✅ Polycrystalline ingots match single-crystal ZT 3.1 at lower cost.

✅ N-type tin selenide in development to pair with p-type.

 

So-called thermoelectric generators turn waste heat into electricity without producing greenhouse gas emissions, providing what seems like a free lunch. But despite helping power the Mars rovers, the high cost of these devices has prevented their widespread use. Now, researchers have found a way to make cheap thermoelectrics that work just as well as the pricey kind. The work could pave the way for a new generation of greener car engines, industrial furnaces, and other energy-generating devices.

“This looks like a very smart way to realize high performance,” says Li-Dong Zhao, a materials scientist at Beihang University who was not involved with the work. He notes there are still a few more steps to take before these materials can become high-performing thermoelectric generators. However, he says, “I think this will be used in the not too far future.”

Thermoelectrics are semiconductor devices placed on a hot surface, like a gas-powered car engine or on heat-generating electronics using thin-film converters to capture waste heat. That gives them a hot side and a cool side, away from the hot surface. They work by using the heat to push electrical charges from one to the other, a process of turning thermal energy into electricity that depends on the temperature gradient. If a device allows the hot side to warm up the cool side, the electricity stops flowing. A device’s success at preventing this, as well as its ability to conduct electrons, feeds into a score known as the figure of merit, or ZT.

 Over the past 2 decades, researchers have produced thermoelectric materials with increasing ZTs, while related advances such as nighttime solar cells have broadened thermal-to-electric concepts. The record came in 2014 when Mercouri Kanatzidis, a materials scientist at Northwestern University, and his colleagues came up with a single crystal of tin selenide with a ZT of 3.1. Yet the material was difficult to make and too fragile to work with. “For practical applications, it’s a non-starter,” Kanatzidis says.

So, his team decided to make its thermoelectrics from readily available tin and selenium powders, an approach that, once processed, makes grains of polycrystalline tin selenide instead of the single crystals. The polycrystalline grains are cheap and can be heated and compressed into ingots that are 3 to 5 centimeters long, which can be made into devices. The polycrystalline ingots are also more robust, and Kanatzidis expected the boundaries between the individual grains to slow the passage of heat. But when his team tested the polycrystalline materials, the thermal conductivity shot up, dropping their ZT scores as low as 1.2.

In 2016, the Northwestern team discovered the source of the problem: an ultrathin skin of tin oxide was forming around individual grains of polycrystalline tin selenide before they were pressed into ingots. And that skin acted as an express lane for the heat to travel from grain to grain through the material. So, in their current study, Kanatzidis and his colleagues came up with a way to use heat to drive any oxygen away from the powdery precursors, leaving pristine polycrystalline tin selenide, whereas other devices can generate electricity from thin air using ambient moisture.

The result, which they report today in Nature Materials, was not only a thermal conductivity below that of single-crystal tin selenide but also a ZT of 3.1, a development that echoes nighttime renewable devices showing electricity from cold conditions. “This opens the door for new devices to be built from polycrystalline tin selenide pellets and their applications to be explored,” Kanatzidis says.

Getting through that door will still take some time. The polycrystalline tin selenide the team makes is spiked with sodium atoms, creating what is known as a “p-type” material that conducts positive charges. To make working devices, researchers also need an “n-type” version to conduct negative charges.

Zhao’s team recently reported making an n-type single-crystal tin selenide by spiking it with bromine atoms. And Kanatzidis says his team is now working on making an n-type polycrystalline version. Once n-type and p-type tin selenide devices are paired, researchers should have a clear path to making a new generation of ultra-efficient thermoelectric generators. Those could be installed everywhere from automobile exhaust pipes to water heaters and industrial furnaces to scavenge energy from some of the 65% of fossil fuel energy that winds up as waste heat. 

 

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