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Lithium ion secondary battery and method of fabricating thereof

  • US 5,981,107 A
  • Filed: 12/15/1997
  • Issued: 11/09/1999
  • Est. Priority Date: 12/17/1996
  • Status: Expired due to Fees
First Claim
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1. A lithium ion secondary battery comprising:

  • a positive electrode active material layer bonded to a positive electrode collector;

    a negative electrode active material layer bonded to a negative electrode collector;

    a separator which has surfaces facing respective surfaces of said active material layers; and

    a lithium ion-containing electrolytic solution kept within said separator, said active material layers and therebetween,wherein convex and concave parts are formed on at least one of the facing surfaces of said positive active material layer and said separator, and at least one of the facing surfaces of said negative material layer and said separator, and two pairs of said facing surfaces are bonded by an adhesive resin layer respectively, so that voids having a predetermined depth are formed by a bonded surface of said convex parts and said concave parts, and the lithium ion-containing electrolytic solution is kept in the voids.

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