SVOLT successfully develops solid state cell with sulfide-based electrolyte.
SVOLT Energy Technology Co., Ltd. (SVOLT), a global high-tech company headquartered in China, is making significant progress in the development of solid-state batteries. The company recently produced an initial batch of 20Ah cells with sulfide-based solid-state electrolyte.
These solid-state cells are considered the next step in the development of advanced battery technology. SVOLT is the first battery manufacturer in China to demonstrate the production of this type of solid-state cell.
Solid-state cells are superior to liquid lithium batteries
The SVOLT solid-state cells have an energy density of 350-400 Wh/kg. With this energy density, vehicles with a range of over 1,000 kilometers can be realized. The cells with sulfide-based solid-state electrolyte are superior to cells with liquid electrolyte in terms of energy density, charging speed, safety, cycle stability and temperature resistance.
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This was demonstrated by successfully completed abuse tests, such as a 200°C hot box test and a nail penetration test. These test conditions typically cause thermal runaway of the cell in liquid electrolyte cells with a high energy content – the new 20Ah cells from SVOLT, on the other hand, survived the tests unscathed.
SVOLT employs its own research and development team for the further development of this important future technology.
Together with top scientific institutes, the battery manufacturer is overcoming the technical challenges that still stand in the way of the breakthrough of the solid-state battery: a high conductivity of the solid-state electrolyte and the interface layers, the maintenance of stable contact between the interfaces over long periods of time and the efficient transfer of lithium ions at the interface, even at high C-rates.
Progress in the development of solid-state batteries
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 in April 2021.
Since then, it has already applied for 187 patents. 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 foundations for mass production.
SVOLT is constantly developing its lithium-ion batteries and battery systems for electric vehicles and energy storage systems and bringing them to mass production. In April 2019, for example, the company launched a novel prismatic cell architecture with stacked electrodes.
These cells have a five percent higher energy density, ten percent longer service life and 15 percent lower costs than cells of the same size produced in the winding process.
Statement
Dr. Dominik Lembke, Director Product Development Europe:
The development of solid cell technology with sulphide-based electrolyte is a major challenge.
“We are proud that we are the first battery manufacturer to have developed prototypes with up to 20 Ah. This success illustrates SVOLT’s leading position in battery technology. SVOLT’s innovations in the production of the first batch of 20Ah sulphide-based solid-state prototypes point the way to the future of electromobility.”
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SVOLT SUCCESSFULLY DEVELOPS SOLID-STATE CELL WITH SULPHIDE-BASED ELECTROLYTE, Frankfurt am Main/Changzhou, August 30, 2022
