Sodium ion conductor and solid-state sodium-ion battery

Abstract

The invention relates to a sodium ion conductor and a solid-state sodium-ion battery. Provided is a sodium ion conductor whose sodium ion conductivity is improved more than the conventional. The sodium ion conductor is a molecular crystal constituted of NaCB9H10, NaCB11H12, and a sodium halide, the sodium halide having a mol fraction of more than 0 and at most 70 on the basis of the total mol ratio of NaCB9H10, NaCB11H12, and the sodium halide.

Description

technical field [0001] The present application relates to sodium ion conductors and sodium ion solid batteries. Background technique [0002] Lithium-ion secondary batteries are used as power sources for mobile devices and vehicles, taking advantage of their high capacity and light weight. As an electrolyte, the use of a solid solid electrolyte instead of a liquid electrolyte is also being studied. [0003] However, there are fears that the price of raw materials for lithium will soar. Therefore, a sodium-ion solid battery using sodium, which is abundant in resources, has attracted attention as a lithium-substituting material. For sodium ion solid batteries, a sodium ion conductor having sodium ion conductivity is required. [0004] In non-patent literature 1, it is disclosed that NaCB 9 h 10 with NaCB 11 h 12 A sodium ion conductor obtained by mixing. [0005] prior art literature [0006] non-patent literature [0007] Non-Patent Document 1: Wan Si Tang et al., "...

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Problems solved by technology

[0003] But fears of surging raw material prices for lithium

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