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US 2025/0030122 A1Published application
Free-standing sulfide solid electrolyte membrane and all solid-state batteries comprising the same
OwnerFang Hao, Daniel Wakaba +3inventors
InventorsFang Hao, Daniel Wakaba, Hyun Seok Kim, Minh Nguyen, Joanna Burdynska
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Abstract
This disclosure relates to a solid electrolyte membrane free of scaffold layer. In one embodiment, the membrane has a lithium-ion conductivity of at least 40% higher than the one prepared with a scaffold layer. Electrochemical devices such as all solid-state battery comprising the solid electrolyte membrane exhibit an improved cycling performance. Methods for preparing the solid electrolyte are also disclosed.
Claims20
An electrolyte membrane comprising:
- a) a sulfide solid electrolyte;
- and
- b) a nonfibrillizable binder with a weight percentage in a range from 1.0 wt % to 10.0 wt % in the electrolyte membrane,
- wherein the electrolyte membrane does not comprise a scaffold layer.
1 more element
A method of preparing a solid membrane free of a scaffold layer, comprising:
- a) mixing a nonfibrillizable binder, a solvent, and particles of a sulfide electrolyte to form a slurry;
- b) coating the slurry on a non-stick base;
- c) drying the coated slurry to form a dried coating on the non-stick base;
- and
- d) peeling the dried coating from the non-stick base, thereby obtaining a solid electrolyte membrane free of scaffold layer.
2 more elements
Dependencies are inferred from the claim text.