Svolt Energy says it has cracked the code to making solid-state sulfide batteries that promise long life and long range.
is the first company to create prototype 20 Ah solid-state sulfide battery cells with an energy density of 350 to 400 Wh/kg. Those prototype cells have successfully passed nail puncture and thermal runaway tests at temperatures of up to 200° C. Once those cells are commercially available, they could make it possible for electric vehicles to drive 1,000 kilometers or more on a single charge, according to the company.
Svolt Energy says its sulfide technology has been difficult to develop, but it now has the ability to produce many kilograms of solid-state electrolyte materials, is able to continuously prepare solid-state electrolyte films, and can assemble solid-state soft pack cells with its newly developed production equipment. It has been awarded 109 sulfide battery technology patents, of which 93 cover the manufacturing process.
NIO than turned to WeLion to develop semi-solid state batteries for its ET5 and ET7 cars, which forced CATL to reassess its position and invest in the development of batteries with a high nickel content. Nowwhich is backed by Volkswagen, says it is ready for pilot mass production of semi-solid state batteries as soon as this year.
Semi-solid state batteries may be a bridge to true solid-state batteries, just as plug-in hybrid cars may act as a bridge to battery electric driving, but true solid-state batteries have significant advantages over conventional lithium-ion and semi-solid state batteries in terms of energy density, charging rate, safety, durability, and thermal management of the individual cells.
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