Harvard develops a solid state battery that charges in minutes
Researchers at Harvard University have developed a new solid state battery that can be recharged in 10 minutes.
Harvard’s latest solid-state battery breakthrough
The lithium metal battery researchers developed at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) can also be charged and discharged at least 6,000 times — more than any other pouch battery cell.
The research published in Nature Materials describes a new way to make solid-state batteries with a lithium metal anode. Xin Li, Associate Professor of Materials Science at SEAS and senior author of the paper, said:
Lithium metal anode batteries are considered the holy grail of batteries because they have ten times the capacity of commercial graphite anodes and could drastically increase the driving distance of electric vehicles.
Our research is an important step toward more practical solid-state batteries for industrial and commercial applications.
One of the biggest challenges in designing solid-state batteries is the formation of dendrites on the surface of the anode. Dendrites are projections of metal that can build up on the lithium surface and grow like roots into the electrolyte. They pierce the barrier that separates the anode and cathode, causing the battery to short or even catch fire.
The dendrites form when lithium ions move from the cathode to the anode during charging, attaching to the surface of the anode in a process called plating. That creates an uneven, non-homogeneous surface on the anode, and allows dendrites to take root.
When discharged, that plaque-like coating needs to be stripped from the anode, and when plating is uneven, the stripping process can be slow and result in potholes that induce even more uneven plating in the next charge.
In 2021, the team designed a multilayer battery that sandwiched different materials of varying stabilities between the anode and cathode. This design prevented the penetration of lithium dendrites by controlling and containing them – but it didn’t stop them altogether.
But in this latest research, the researchers stop dendrites from forming by using micron-sized silicon particles in the anode to constrict the lithiation reaction and facilitate homogeneous plating of a thick layer of lithium metal.
In the Harvard researchers’ design, when lithium ions move from the cathode to the anode during charging, the lithiation reaction is constricted at the shallow surface and the ions attach to the surface of the silicon particle, but don’t penetrate further.
“In our design, lithium metal gets wrapped around the silicon particle, like a hard chocolate shell around a hazelnut core in a chocolate truffle,” said Li.
And, because plating and stripping can happen quickly on an even surface, the battery can recharge in about 10 minutes.
The researchers built a postage stamp-sized pouch cell version of the battery, which is 10 to 20 times larger than the coin cell made in most university labs. The solid-state battery retained 80% of its capacity after 6,000 cycles, outperforming other pouch cell batteries on the market today.
Harvard Office of Technology Development licensed the technology to Adden Energy, a Harvard spinoff company cofounded by Li and three Harvard alumni. Adden Energy has scaled up the technology to build a smart phone-sized pouch cell battery.
Electrek’s Take
This is yet another milestone achieved in the solid-state battery saga. The ultimate challenge is still the ability to mass-produce these batteries at a lower price than lithium-ion batteries. That will be the real game-changer for EVs.
Photo: BMW
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Tesla’s top crash safety architect, who helped the automaker achieve top safety scores for its entire car line-up, announced that he is leaving the automaker after 14 years.
We are talking about Petter Winberg, Tesla’s Principal Engineer for CAE crashing safety for the last decade.
After an extensive career at Volvo and SAAB, both car brands praised for their commitment to safety, Winberg joined Tesla in 2011 to work on the “crash safety development of Model S structure and side occupant restraints.”
At the time, Tesla was still working on the Model S, its first vehicle built entirely from the ground up, considering the original Roadster was based on the Lotus Elise.
CEO Elon Musk aimed for “Tesla vehicles to be the safest on the planet,” and Winberg took the challenge seriously.
He led the development of the vehicle body and chassis structure for Model 3 and Model Y, as well as the crash structure for Model S and Model X.
All of these vehicles have received top safety crash scores from independent testers worldwide – quickly elevating Tesla’s brand into a leader in passive safety.
Winberg and his team deserve a lot of the credit for this.
The engineer also led the design of crash readiness and the energy-absorbing capacity of Tesla’s latest “gigacasting” and structural battery pack designs, for which he obtained patents. Other automakers have since adopted similar designs.
For those less technical who want to understand how good and respected Winberg is at Tesla, he has been working for Tesla remotely in Sweden for the last five years. That’s impressive in itself, considering how much Musk hates remote work. He previously emailed Tesla management to tell them that only exceptional employees would be eligible for an exemption to work remotely, which he would approve himself.
After 14 years at Tesla, Winberg announced last week that he is leaving (via LinkedIn):
Having developed Model S, S-DM, X, 3, Y, Y-SP as well as future crash architectures, I have decided now is the time to move on. Thank you Tesla, keep crushing it! What an incredible team, I will miss you all.
He didn’t elaborate on his reasons for leaving the automaker or announce another venture.
Electrek’s Take
While Tesla has received much criticism for the dangers of its Autopilot and “Full Self-Driving” systems, I don’t think anyone can question that Tesla vehicles perform extremely well in terms of passive safety.
Independent testing has proven it time and time again.
Tesla has led the way in taking advantage of designing electric vehicles from the ground up. Its skateboard-like powertrain design and lack of engine in the front allow for a giant crumple zone to absorb the energy in case of a crash.
A big thank you to Petter Winberg for his designs and leadership in improving Tesla’s passive safety. He has undoubtedly made the automotive industry safer and saved lives. Congratulations.
As for his departure, it’s certainly a blow for Tesla. As we previously reported, the company has suffered a significant exodus of talent over the last year, with a big part of its leadership leaving during and after a wave of layoffs last year.
Many predict that Tesla could again initiate another wave of layoffs in the coming months as its sales are crumbling worldwide.
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The SU7 Ultra, Xiaomi’s new flagship electric vehicle, went against a Tesla Model S Plaid in a drag race and it smoked it.
The car is ridiculously powerful, and it’s about 35% cheaper than the Plaid, which is already affordable relative to its supercar performance.
We recently released a report about how impressed we are by Xiaomi’s incredible rise in the EV market in China.
Its first vehicle, the SU7, is a smash hit. It now consistently delivers over 20,000 units a month, it has surpassed the Tesla Model 3, its closest competitor, and has a more than 30-week-long backlog of orders.
The vehicle achieves more range and is cheaper than Model 3 while having additional features.
Last month, Xiaomi launched a new top-of-the-line version of the SU7: the SU7 Ultra.
The headline is that the $72,800 (529,900 RMB) has a powertrain packing up 1,526 horsepower. That’s absolutely insane. Xiaomi quotes a 0 to 100 km/h (0 to 62 mph) acceleration in just 1.98 seconds.
While the SU7 is meant more as a Model 3 competitor, the SU7 Ultra actually competes with Tesla’s flagship Model S Plaid in terms of performance.
They organized a drag race between the SU7 Ultra and Model S Plaid. Here it is:
As you can see, the SU7 Ultra slipped at the start, which is not surprising considering how much power it outputs, but it still managed to catch up and beat the Model S Plaid.
At over 1,000 horsepower, many, myself included, thought that it was a bit mad to offer a vehicle like the Model S Plaid with such supercar power for a relatively cheap price – RMB 814,900 (approximately $112,000 USD) in China and just $95,000 in the US.
But now, Xiaomi shakes things up even more by offering 1,500 horses for just a little more than $70,000. It’s mad.
Now, I can hear your thoughts: “but it’s just good in a straight line drag race like other EVs.” Think again, the SU7 Ultra prototype claimed the title as the fastest four-door sedan at the famous Nurburgring race track in Germany.
Electrek’s Take
Damn, the Chinese are good. Xiaomi has come hard with the SU7, but the crazy thing is that it’s just one of several Chinese top-of-the-line EVs coming out. Nio has the ET7, BYD has the U7, and there are many more.
These vehicles are all impressive in their own rights.
It’s easy to understand why American automakers are so scared and lobbied the US government for 100% tariffs on them.
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Environment
Trump administration sends a clear message to the oil and gas industry: ‘You’re the customer’
HOUSTON — The officials leading President Donald Trump’s energy agenda made clear to oil, gas and mining executives this week that they have an ally in Washington who intends to make it as easy as possible for them to drill in federal lands and waters.
Interior Secretary Doug Burgum told executives gathered for the world’s largest energy conference that the Trump administration does not view climate change as an existential threat. Energy Secretary Chris Wright said rising global temperatures are simply a byproduct of developing the country’s national resources to support economic growth and national security.
Burgum leads Trump’s recently established National Energy Dominance Council and Wright serves as his deputy on the interagency body tasked with boosting production. Burgum was effusive in his praise of the oil and gas industry during remarks delivered at CERAWeek by S&P Global conference.
“I’m going to share two words that I do not think that you have heard from a federal official in the Biden administration during the last four years. And those two words are thank you,” said Burgum, who previously served as governor of North Dakota, a state that produces 1.2 million barrels of oil per day.
Burgum leaned on his experience as software company executive to lay out his view of the interior department’s role. The department under his leadership views the companies developing resources on federal lands as “customers” who are contributing revenue to the nation’s “balance sheet,” Burgum said.
“If someone was sending me revenue, they weren’t the enemy. They were the customer,” Burgum said. The administration loves anyone who wants to harvest timber, mine for critical minerals, graze cattle, or produce oil and gas on federals, the interior secretary said.
Royalties sent from lease agreements on federal land will help the U.S. pay down its national debt and balance the budget, Burgum said. “You’re the customer,” the interior secretary told the executives.
The value of nation’s abundant natural resources far outweighs its $36 trillion in debt, Burgum said. If financial markets understood the value of America’s natural resources, the 10-year long-term interest rate would come down, Burgum claimed.
“The interest rates right now are one of the biggest expenses we have as a country,” Burgum said. “So one of the things that we have to do is unleash America’s balance sheet, and President Trump is helping us do that,” he said.
Burgum slammed the Biden administration’s focus on climate change as an “ideology.” He said the Trump administration views Iran acquiring a nuclear weapon and China winning the artificial intelligence race as the two existential threats facing the U.S. rather than global warming. Wright said Biden had a “myopic” and “quasi religious” belief in reducing emissions that hurt consumers.
Burgum and Wright dismissed policies that support a transition from fossil fuels to renewable energy, arguing that wind and solar won’t be able to meet rising energy demand in the coming years from artificial intelligence and re-industrialization.
“There is simply no physical way that wind, solar and batteries could replace the myriad uses of natural gas. I haven’t even mentioned oil or coal yet,” Wright said at the conference. Wright previously served as CEO of oilfield services company Liberty Energy and a board member at nuclear startup Oklo.
Oil execs see allies in Washington
Oil executives are enthusiastic about the change of administrations in Washington, returning the praise they received from Trump’s energy team during the week.
ConocoPhillips CEO Ryan Lance said Wright and Burgum “understand the business,” describing them as the best energy team the U.S. has seen in decades. TotalEnergies CEO Patrick Pouyanné said he was “impressed by the quality of our counterparts.” Chevron CEO Mike Wirth said the industry is “seeing some reality come back to the conversation.”
“For years, my message has been, we need a balanced conversation about affordability, reliability and the environment, and focusing only on climate leads us to ignore the first two,” Wright said.
The executives all referred to the Gulf of Mexico as the Gulf of America, following Trump’s executive order to rename the body of water. The president issued an order on his first day to repeal Biden’s ban on offshore drilling in 625 million acres of U.S. coastal waters.
BP CEO Murray Auchincloss briefly slipped before correcting himself when discussing how generative AI is helping with exploration: “We started doing this in the Gulf of Mexico, uh America, and we spread that to other nations as well.”
But Trump’s calls to “drill, baby, drill” are running up against market reality. The CEOs of Chevron and Conoco said U.S. oil production will likely plateau in the coming years after hitting new records under the Biden administration.
“Chasing growth for growth’s sake has not proven to be particularly successful for our industry,” Wirth said. “At some point, you’ve grown enough that you should start to move towards a plateau, and you should generate more free cash flow, rather than just more barrels.”
Lance sees U.S. oil production plateauing later this decade and then slowly declining.
“Maybe it’s time to go back to exploring the Gulf of America,” Pouyanné said. “The new administration is opening the Gulf. It has been slowed down after the Macondo drama,” he said, referring the Deepwater Horizon oil spill, the largest in the history of marine drilling operations.
U.S. oil producers are scheduled to meet with Trump next week, industry lobby group American Petroleum Institute said in statement.
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