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11.10.2022 | Battery | News | Online-Artikel

Svolt Develops Solid State Cell with Sulfide-based Electrolyte

verfasst von: Christiane Köllner

1 Min. Lesedauer

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Svolt has developed a 20-Ah cell with sulfide-based solid-state electrolyte. With these solid-state cells, electric vehicles could achieve a range of over 1000 km. 

Svolt reports progress in the development of solid-state batteries. The Chinese battery maker has produced a first batch of 20-Ah cells with sulfide-based solid-state electrolyte. The solid-state cells have an energy density of 350 to 400 Wh/kg. With this energy density, electric vehicles could realize a range of more than 1000 km. Svolt says it is the first battery manufacturer in China to demonstrate the production of this type of solid-state cell. 

The cells with sulfide-based solid-state electrolyte are said to be superior to cells with liquid electrolyte in terms of energy density, charging speed, safety, cycling stability and temperature resistance. Svolt had demonstrated this by successfully completing abuse tests, such as a 200 °C hot-box test and a nail penetration test. These test conditions would typically cause thermal runaway in high energy liquid electrolyte cells. The new 20-Ah cells, however, survived the tests unscathed, Svolt reports.

Expansion of research activities

Svolt plans to further expand its research and development activities in the field of solid-state batteries as well as in new process technologies in order to further develop the technological basis for mass production. As early as April 2021, Svolt’s Wuxi Lithium Battery Innovation Center and the Ningbo China Institute of Materials Technology and Engineering of the Chinese Academy of Sciences established a joint research center for solid-state battery technology.

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