Method for evaluating oxidation resistance of sulfide solid electrolyte
By measuring the impedance of sulfide solid electrolytes mixed with nickel, manganese, or cobalt oxides over time, the method provides a straightforward and precise evaluation of oxidation resistance, addressing the challenges of existing assessment methods.
WO2026110841A1PCT designated stage Publication Date: 2026-05-28MITSUI MINING & SMELTING CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- MITSUI MINING & SMELTING CO LTD
- Filing Date
- 2025-11-19
- Publication Date
- 2026-05-28
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Figure JP2025040523_28052026_PF_FP_ABST
Abstract
Provided is a method for evaluating oxidation resistance of a sulfide solid electrolyte containing a lithium (Li) element and a sulfur (S) element. In the present invention, direct current resistance or alternating current impedance of a mixture of the sulfide solid electrolyte and an oxide of nickel, manganese, or cobalt is measured over time; and oxidation resistance of the sulfide solid electrolyte is evaluated on the basis of a change over time in said resistance or said impedance. The oxide of nickel preferably contains NiO2. The oxide of manganese preferably contains MnO2. The oxide of cobalt preferably contains CoO2.
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Citation Information
Patent Citations
JP1992319656A
JP2000199751A
JP2011191270A
JP2023067840A