Lithium ion rechargeable battery and process for poducing the rechargeable battery

Abstract

A multilayer whole solid-type lithium ion rechargeable battery has hitherto been produced by stacking green sheets of a positive electrode layer, a solid electrolyte layer, and a negative electrode layer, which are formed of respective materials different from each other in coefficient of thermal expansion, and firing the layers at a time. This technique poses problems of delamination and nonlamination attributable to a difference in shrinkage. The problems can be solved by forming green sheets with the addition of a sintering aid to each starting material powder for the positive electrode layer, the solid electrolyte layer, and the negative electrode layer and performing control, by setting the additive rate of the sintering aid and the firing temperature, so that the shrinkages of the respective green sheets are substantially equal to each other. Consequently, unfavorable phenomena such as delamination can be prevented.

Description

technical field

[0001] The present invention relates to a multilayer all-solid lithium ion secondary battery including a laminate composed of a positive electrode layer, a solid electrolyte layer, and a negative electrode layer, and a method for manufacturing the same. Background technique

[0002] Patent Document 1: Japanese Patent Laid-Open No. 2006-261008

[0003] Patent Document 2: Japanese PCT Publication No. 2003-505325

[0004] Patent Document 3: Japanese PCT Publication No. 2003-505326

[0005] Patent Document 4: Japanese Patent Laid-Open No. 2001-48545

[0006] In recent years, the development of electronic technology has been astonishing, and portable electronic devices are required to be smaller, lighter, thinner, and multifunctional. Along with this, there has been a strong demand for small, lightweight, thin, and reliable batteries to be used as power sources for electronic devices. In order to meet these demands, there has been proposed a multilayer lithium...

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