All-solid-state secondary battery

Abstract

Provided is an all-solid-state secondary battery with high uniformity of heat dissipation for heat generated by a battery reaction. An all-solid-state lithium ion secondary battery (100) comprises a laminate (5) that has a positive electrode layer (1) including a positive electrode current collector layer (1A) and a positive electrode active material layer (1B), a negative electrode layer (2) including a negative electrode current collector layer (2A) and a negative electrode active material layer (2B), a solid electrolyte layer (3) including a solid electrolyte, and a a solid-electrolyte-containing margin layer (4) disposed side-by-side with each of the positive electrode layer (1) and the negative electrode layer (2). The positive electrode layer (1) and the negative electrode layer (2) are alternatingly laminated in the laminate (5) with the solid electrolyte layer (3) containing a solid electrolyte interposed therebetween. In the laminate (5), metal particles (10) having an oxide film are included in the positive electrode active material layer (1B), the negative electrode active material layer (2B), the solid electrolyte layer (3), and the margin layer (4).

Description

technical field [0001] The invention relates to an all solid secondary battery. [0002] This application claims the priority of Japanese Patent Application No. 2018-225662 filed in Japan on November 30, 2018, and the contents thereof are incorporated herein. Background technique [0003] In recent years, electronic technology has developed significantly, and portable electronic devices have become smaller, lighter, thinner, and multifunctional. Accordingly, there has been a strong desire for small, lightweight, thin, and reliable batteries to be used as power sources for electronic devices, and all-solid-state lithium-ion secondary batteries made of solid electrolytes have attracted attention. [0004] Generally, all solid-state lithium-ion secondary batteries are classified into two types: thin-film type and high-capacity type. The thin-film type is produced by thin-film technology such as PVD method or sol-gel method, and the large-capacity type is produced by powder mo...

AI Technical Summary

Problems solved by technology

However, the thin-film type has the following problems: it is difficult to increase the thickness of the active material layer or to form a high layer, so the capacity is small, and the production cost is high.

In addition, thinning of the solid electrolyte layer and high stacking of the battery are a problem because it is difficult to make a sheet.

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