Organic solid electrolytes and all-solid sodium-ion batteries

Abstract

This invention provides an organic solid electrolyte that can improve the rate characteristics of an all-solid-state sodium-ion battery, and an all-solid-state sodium-ion battery with improved rate characteristics. [Solution] An organic solid electrolyte comprising sodium bis(fluorosulfonyl)amide (NaFSA) and polyethylene oxide (PEO), wherein the molar ratio of Na:EO between NaFSA and PEO is in the range of 1:20 to 1:50 when the constituent unit of PEO is EO. An all-solid-state sodium-ion battery 10 comprising a positive electrode layer 12, an organic solid electrolyte layer 14 formed of the organic solid electrolyte, an inorganic solid electrolyte layer 16, and a negative electrode layer 18, in this order in the thickness direction.

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