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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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A 100-MW solar farm just broke ground in Wisconsin

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A 100-MW solar farm just broke ground in Wisconsin

National Grid Renewables has broken ground on its 100 MW Apple River Solar Project in Polk County, Wisconsin.

The Wisconsin solar farm, which will use US-made First Solar Series 6 Plus bifacial modules, will be constructed by The Boldt Company, creating 150 construction and service jobs. Apple River Solar will generate over $36 million in direct economic benefits over its first 20 years.

Once it comes online in late 2025, Apple River Solar will supply clean energy to Xcel Energy, which serves customers throughout the Upper Midwest. According to National Grid Renewables, the solar farm will generate enough energy to power around 26,000 homes annually. It will also offset about 129,900 metric tons of carbon dioxide emissions each year – equivalent to taking 30,900 cars off the road.

“We are excited to see this project begin as it underscores our dedication to delivering clean, reliable and affordable energy to our customers,” said Karl Hoesly, President, Xcel Energy-Wisconsin and Michigan. “This project is an important step in those goals while bringing significant economic benefits to Polk County and the local townships.”

Electrek reported in February that Xcel Energy, Minnesota’s largest utility, expects to cut more than 80% – and possibly up to 88% – of its emissions by 2030, putting it on track to hit Minnesota’s goal of net zero by 2040. It also says it’s on track to achieve its clean energy goals for all the Upper Midwest states it serves – Minnesota, Wisconsin, North Dakota, South Dakota, and Michigan.


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Tesla announces 500 kW charging as it finally delivers V4 Supercharger cabinets

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Tesla announces 500 kW charging as it finally delivers V4 Supercharger cabinets

Tesla has announced that it will finally deliver 500 kW charging as it is about to install its long-awaited V4 Supercharger cabinets.

The rollout of Supercharger V4 has been a strange one, to say the least.

Tesla has been deploying the new charging stations for two years and calling them “Supercharger V4”, but it has only been deploying the charging stalls.

Supercharger stations are made of two main parts: the stalls, which are where the charging cable is located, and the cabinets, which are generally located further back and include all the power electronics.

For all these new “Supercharger V4”, Tesla was actually using Supercharger V3 cabinets. This has been limiting the power output of the charging stations to 250 kW – although

Today, Tesla officially announced its “V4 Cabinet”, which the automaker claims will enable of “delivering up to 500kW for cars and 1.2MW for Semi.”

Here are the main features of the V4 Cabinet as per Tesla:

  • Faster charging: Supports 400V-1000V vehicle architectures, including 30% faster charging for Cybertruck. S3XY vehicles enjoy 250kW charge rates they already experience on V3 Cabinet — charging up to 200 miles in 15 minutes.
  • Faster deployments: V4 Cabinet powers 8 posts, 2X the stalls per cabinet. Lower footprint and complexity = more sites coming online faster.
  • Next-generation hardware: Cutting-edge power electronics designed to be the most reliable on the planet, with 3X power density enabling higher throughput with lower costs.

Tesla reports that its first sites with the new V4 Cabinets are going into permitting now. The company expects its first sites to open next year.

We recently reported about Tesla’s new Oasis Supercharger project, which includes larger solar arrays and battery packs to operate the charging station mostly off-grid.

Early in the deployment of the Supercharger network, Tesla promised to add solar arrays and batteries to all Supercharger stations, and Musk even said that most stations would be able to operate off-grid.

While Tesla did add solar and batteries to a few stations, the vast majority of them don’t have their own power system or have only minimal solar canopies.

Back in 2016, I asked Musk about this, and he said that it would now happen as Tesla had the “pieces now in place” with Supercharger V3, Powerpack V2, and SolarCity:

It took about 8 years, but it sounds like the pieces are now getting actually in place with Supercharger V4, Megapacks, and this new Oasis project.

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Hyundai is launching an AI-powered EV next year to keep pace in China

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Hyundai is launching an AI-powered EV next year to keep pace in China

Hyundai has a new secret weapon it’s about ready to unleash. To revamp the brand in China and counter BYD’s surge, Hyundai is launching a new AI-powered EV next year. The new model will be Hyundai’s first dedicated electric car for the world’s largest EV market.

With the help of Haomo, a Chinese autonomous startup, Hyundai will launch its first EV equipped with generative AI. It will also be its first model designed specifically for China.

A Hyundai Motor official said (via The Korea Herald) the company is “working to load the software” onto the new EV model, “which will be released in the Chinese market next year.” The spokesperson added, “The level of autonomous driving is somewhere between 2 and 2.5.”

In comparison, Tesla’s Autopilot is considered a level 2 advanced driver assistance system (ADAS) on the SAE scale (0 to 5), meaning it offers limited hands-free features.

With Autopilot, you still have to keep your eyes on the road and hands on the steering wheel, or the system will notify you and eventually disengage.

Hyundai-AI-powered-EV
Hyundai IONIQ 5 with Waymo autonomous driving tech (Source: Hyundai)

Haomo’s system, DriveGPT, unveiled last spring, takes inspiration from the OpenAI’s popular ChatGPT.

The system can continuously update in real-time to optimize decision-making by absorbing traffic data patterns. According to Haomo, DriveGPT is used in around 20 models as it looks to play a bigger role in China.

Hyundai-AI-powered-EV
Hyundai at the Beijing Auto Show 2024 (Source: Hyundai Motor)

Hyundai hopes new AI-powered EV boosts sales in China

Electric vehicle sales continue surging in China. According to Rho Motion, China set another EV sales record last month with 1.2 million units sold, up 50% from October 2023.

Over 8.4 million EVs were sold in China in the first ten months of 2024, a notable 38% increase from last year.

Hyundai-AI-powered-EV
Hyundai IONIQ 6 (Source: Hyundai)

BYD continues to dominate its home market. According to Autovista24, BYD accounted for 32.9% of all PHEV and EV (NEV) sales in China through September, with over half of the top 20 best-selling EV models.

Tesla was second with a 6.5% share of the market, but keep in mind these numbers only include plug-in models (PHEV).

2025-Hyundai-IONIQ-5-prices
2025 Hyundai IONIQ 5 (Source: Hyundai)

Like most foreign automakers, Hyundai is struggling to keep up with the influx of low-cost electric models in China. Beijing Hyundai’s sales have been slipping since 2017. Through September, Korean automaker’s share of the Chinese market fell to just 1.2%.

Last month, Hyundai opened its first overseas digital R&D center in China to help kick off its return to the region.

According to local reports, Hyundai is partnering with other local tech companies like Thundersoft, a smart cockpit provider, and others in China to power up its next-gen EVs

With its first AI-powered EV launching next year, Hyundai hopes to turn things around in the region quickly. The new model will be one of five to launch in China through 2026.

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