High-flux predicting method of cladding material with stable compatibility with solid electrolyte

Abstract

The invention provides a high-flux predicting method of a cladding material with stable compatibility with a solid electrolyte. A new high-flux analysis mode is adopted. The method is effectively applied to a large database. More than 67,026 materials are successfully searched. A coating material which can best stabilize an interface between a sulfide solid electrolyte and a typical electrode (cathode / anode) material can be found.

Description

technical field [0001] The invention belongs to the field of solid-state electrolytes and solid-state batteries, and in particular relates to a high-flux prediction method for a coating material compatible and stable with solid-state electrolytes. Background technique [0002] All-solid-state lithium-ion batteries are one of the most promising directions in the field of next-generation energy storage 1-3 . Most notably, ceramic solid-state electrolytes with nonflammable properties can address many of the safety concerns associated with the use of highly flammable organic liquid electrolytes. Furthermore, unlike liquid electrolytes, solid electrolytes do not suffer from the increased viscosity at low temperatures that would limit their operation, a key operating condition required by the fast-growing electric vehicle market 4-6 . In some cases, solid electrolytes can even have higher ionic conductivity than liquid electrolytes 6，7 . In addition, solid-state electrolytes ...

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Problems solved by technology

Although the oxide can maintain good stability in a wide voltage range 17 , but it usually has a low ionic conductivity (-1 )

In contrast, sulfides have excellent ionic conductivity up to 25mS cm -1 6，20 , the disadvantage is that the electrochemical stability is poor, and it will decompose within the battery operating voltage range 17-19

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