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Lithium ion rechargeable battery and process for poducing the rechargeable battery

A technology for secondary batteries and manufacturing methods, applied in secondary batteries, electrode manufacturing, battery electrodes, etc., can solve the problems of peeling of the bonding interface, inability to manufacture high-performance batteries, and inability to densify various components, and prevent delamination. layer, the effect of realizing high performance and reducing material cost

Active Publication Date: 2010-12-01
NAMICS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned conventional multilayer lithium ion secondary battery has the following problem: after firing, peeling occurs at the joint interface of various members.
In addition, there is a problem that unless firing is carried out at a sufficiently high temperature, various components cannot be densified, and high-performance batteries cannot be manufactured.

Method used

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  • Lithium ion rechargeable battery and process for poducing the rechargeable battery
  • Lithium ion rechargeable battery and process for poducing the rechargeable battery
  • Lithium ion rechargeable battery and process for poducing the rechargeable battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0108] [Adjust shrinkage by adding sintering aid]

[0109] A sintering aid is added to the positive electrode material, solid electrolyte material, and negative electrode material constituting the lithium-ion secondary battery to produce pellets, and the shrinkage of the pellets caused by firing is measured, and the cross-section is observed by SEM.

[0110] (production of samples)

[0111] The samples used this time are figure 1 The shrinkage shown was evaluated for the same specimens tested. The method of preparing the sample will be described in more detail below.

[0112] The positive electrode material is represented by the chemical formula as LiMnO 2 The substance, MnCO manufactured by Chuo Denki Kogyo 3 ・(C2-SP) and Li manufactured by Nippon Chemical Industries 2 CO 3 It was synthesized as a raw material and pre-baked at 800° C. for 2 hours. The solid electrolyte material is represented by the chemical formula Li 7 PSiO 8 The substance, Li manufactured by Wako ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M4/62H01M4/48H01M4/485H01M4/50H01M10/0525H01M10/0562H01M10/0585
CPCH01M4/0471H01M10/0562H01M10/0585H01M10/38Y02E60/122H01M10/0525H01M2300/0071H01M4/62H01M4/628Y10T29/49115Y02E60/10Y02P70/50
Inventor 佐藤洋笹川浩坂井德幸藤田隆幸
Owner NAMICS CORPORATION
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