Non-aqueous electrolyte energy storage element, equipment, and method of using the non-aqueous electrolyte energy storage element

By using a high-resistance separator and limiting the positive electrode potential to 3.69 V vs. Li/Li+ in non-aqueous electrolyte storage elements, the capacity retention rate is improved, addressing the issue of secondary particle cracking and degradation in lithium transition metal composite oxides with nickel.

JP7877687B2Active Publication Date: 2026-06-23GS YUASA CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
GS YUASA CORP
Filing Date
2022-01-11
Publication Date
2026-06-23

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Abstract

To provide a nonaqueous electrolyte storage element high in capacity maintenance ratio after a discharge / charge cycle.SOLUTION: A nonaqueous electrolyte storage element comprises: a positive electrode in which a positive electrode potential for a discharge final voltage in ordinary use is less than 3.69 Vvs.Li / Li+ and which contains a lithium transition metal composite oxide including a nickel element; a nonaqueous electrolyte; and a separator in which membrane resistance at 25°C in the state of being impregnated with the nonaqueous electrolyte is 2.5 Ω cm2 or more.SELECTED DRAWING: Figure 1
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