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Method of assembling components of an electrochemical generator using thin films of lithium

  • US 4,897,917 A
  • Filed: 07/13/1988
  • Issued: 02/06/1990
  • Est. Priority Date: 06/18/1987
  • Status: Expired due to Term
First Claim
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1. A method for assembling the components of an electrochemical generator, wherein said components are in the form of thin films and comprise, as a first component, a lithium- or lithium alloy-based negative electrode and, as a second component, at least one thin film of a solid polymer electrolyte capable of conducting lithium ions, said method comprising:

  • (i) using a negative electrode precursor which consists of an intermediate assembly formed from a thin film of lithium or lithium alloy supported by an inert plastic film having controlled adhesion to the lithium such that the bond of the lithium-based film to said inert plastic film is sufficient to permit the handling of said intermediate assembly but is less than the bond of the lithium film to the solid polymer electrolyte of the component containing said electrolyte; and

    (ii) applying the free metal surface of said intermediate assembly against said solid polymer electrolyte of the component containing said electrolyte by working these at a temperature and under a pressure sufficient to cause the lithium of said intermediate assembly to adhere to said solid polymer electrolyte.

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