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In-situ Solid State Electrolyte Formation

Invention Reference Number

202405723

Fabrication methods are needed that are easily scalable, will enable facile manufacturing of SSEs that are < 50 µm thick to attain high energy density, and also exhibit good stability at the interface of the anode.17 Specifically, Wu et al. estimates that the targeted thickness of the SSE should be < 25 µm thick, assuming a density of 1.5 g cm-3, to assemble a Li-metal pouch cell with an energy density = 350 Wh kg-1. The present invention relates to the in-situ formation of an ion conducting solid electrolyte between composite electrodes with a reducing alkali metal (M) and organic polymers or solvents. This was done with no electrolyte or salt present in the system. This invention will improve the safe handling and storage of batteries by eliminating the need for a liquid electrolyte or salt in the cell while reducing production costs.