Li電極とLiS-PS系固体電解質の界面にインジウム薄膜を備えたバルク型リチウム金属二次電池

概要

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To enhance a cyclability and a rate capability in bulk-type solid-state cells using a lithium metal electrode, an indium thin layer prepared by vacuum-evaporation was inserted at the interface between a lithium electrode and an Li2S-P2S5 solid electrolyte layer. The Li/Li4Ti5O12 cells using indium thin film were charged and discharged for 120 cycles reversibly and worked at the high current density of 1.3 mA cm−2. Inserting lithium-alloy thin layer at the interface between the lithium electrode and the solid electrolyte layer brought about a good cyclability and a high rate capability for the all-solid-state lithium metal cells because of the formation and retention of intimate contacts at the interface. The obtained results are useful for achieving bulk-type solid-state lithium batteries with high power and energy densities.