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Electrochemical device

An electrochemical and electrode technology, applied in the field of electrochemical devices, can solve the problems of poor electrolyte resistance of nickel porous bodies and other problems

Inactive Publication Date: 2013-10-30
SUMITOMO ELECTRIC IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem pointed out that when the potential of the porous nickel body as the positive electrode (first electrode) collector becomes high (noble) in the organic electrolyte, the electrolyte resistance of the porous nickel body deteriorates

Method used

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Examples

Experimental program
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preparation example Construction

[0053] (Preparation of Porous Resin Molded Article)

[0054] A porous resin molded body having a three-dimensional network structure and having continuous pores is produced. Any resin can be selected as the material of the porous resin molded body. For example, foamed resin moldings of polyurethane, melamine resin, polypropylene, polyethylene, etc. can be used. Although shown as a foamed resin molded body, a resin molded body having an arbitrary shape may be selected as long as the resin molded body has pores (communicating pores) connected to each other. For example, instead of the foamed resin molded body, a nonwoven fabric-like body in which resin fibers are entangled with each other may be used. Preferably, the resin foamed molded body has a porosity of 80% to 98% and a cell diameter of 50 μm to 500 μm. Both polyurethane foam and foamed melamine resin have high porosity, high pore connectivity, and excellent thermal decomposability, and thus can be suitably used as resi...

Embodiment

[0136] Hereinafter, the present invention will be described in more detail with reference to examples. However, it should be understood that the present invention is not limited to these Examples.

[0137] (formation of conductive layer)

[0138] A production example of the aluminum porous body will be specifically described below. A polyurethane foam having a thickness of 1 mm, a porosity of 95%, and approximately 50 cells (cells) per inch was prepared as a foamed resin molded body and cut into a square of 100 mm×30 mm. This polyurethane foam was immersed in a carbon suspension, and then dried. Thus, a conductive layer with carbon particles adhered to the entire surface was formed. This suspension contained 25% by mass of graphite and carbon black, and also contained a resin binder, a penetrating agent, and a defoaming agent. The particle diameter of carbon black was 0.5 μm.

[0139] (Molten Salt Plating)

[0140] A polyurethane foam with a conductive layer on the surfa...

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Abstract

Provided is an electrochemical device which is easy to produce and which has excellent characteristics. An electrochemical device includes a first electrode including an aluminum porous body having interconnecting pores and an active material filled into the pores of the aluminum porous body, a separator, and a second electrode, the first electrode, the separator, and the second electrode being stacked, in which a plurality of electrode bodies each including the first electrode, the separator, and the second electrode are stacked without being wound.

Description

technical field [0001] The present invention relates to an electrochemical device comprising an aluminum porous body, in particular to its electrode structure. The term "electrochemical device" refers to lithium batteries (such as lithium secondary batteries) and capacitors with nonaqueous electrolytes (hereinafter referred to as "capacitors"), lithium ion capacitors with nonaqueous electrolytes (hereinafter referred to as "lithium ion capacitors") )Wait. Background technique [0002] In recent years, research has been actively conducted on electrochemical devices such as lithium batteries, capacitors, and lithium ion capacitors used in portable information terminals, electric vehicles, and household power storage devices. An electrochemical device includes a first electrode, a second electrode, and an electrolyte. A lithium secondary battery includes a positive electrode serving as a first electrode, a negative electrode serving as a second electrode, and an electrolyte, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M4/80H01M4/13H01M10/04H01M4/66H01M10/052H01M10/0585H01G11/06H01G11/28H01G11/70
CPCH01M10/0436Y02E60/122Y02E60/13H01M4/808H01M4/661H01M10/0585H01G11/28H01M10/052H01M4/13H01G11/70H01G11/06H01M2/1673H01M50/46Y02E60/10Y02P70/50
Inventor 细江晃久奥野一树太田肇木村弘太郎后藤健吾境田英彰西村淳一
Owner SUMITOMO ELECTRIC IND LTD