Home Business US SES all-solid-state battery performance and stability significantly improved

US SES all-solid-state battery performance and stability significantly improved

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SES, a global all-solid-state battery developer, invested by Hyundai Motor Company, SK Corporation, and General Motors (GM) of the United States, has developed a next-generation battery that dramatically improves driving performance and supplements stability. It is predicted to become a ‘game changer’ in the electric vehicle battery market.

According to the industry on the 28th, SES will open an online event called ‘Battery World’ in the US on the 3rd of next month to unveil a hybrid lithium metal battery. According to the specifications of this battery obtained by this paper, the energy density reaches 417 Wh per kg (935 Wh per L). Considering that the energy density of the existing lithium-ion battery is 250~300Wh per kg, the mileage will be increased by about 30%.

Charging performance has also been improved. It can quickly charge from 10% to 90% in just 12 minutes. It is a step forward from the existing best-in-class battery that charges from 10% to 80% in 18 minutes. Even after repeating charging and discharging 800 times and 550 times, the battery performance was maintained at 80% and 90%, respectively.

SES is pursuing listing by merging with ‘Ivanhoe Capital Acquisition’, a SPAC listed on the New York Stock Exchange next month. SES’s estimated stock valuation is $3.6 billion. The company plans to build a lithium metal battery production plant in Shanghai, China, with the funds secured through the listing. The target period for mass production is 2025.

SK Innovation also announced on the same day that it will invest $30 million in Solid Power, which competes with SES, and jointly develop and produce all-solid-state batteries. The two companies will start developing all-solid-state batteries using the NCM (nickel, cobalt, manganese) anode material and silicon anode material of existing lithium-ion batteries. It plans to increase the energy density by about 33% compared to conventional batteries. This means that an electric vehicle that has traveled 700 km on a single charge can travel 930 km.

Kang Ki-seok, a professor of Materials Science and Engineering at Seoul National University, said, “The key is how stable lithium metal batteries can be mass-produced after millions of tests.”

Correspondent Il-gyu Kim [email protected]

ⓒ Hankyung.com, unauthorized reprinting and redistribution prohibited

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