Solid polymer electrolyte electrochemical storage cell containing a redox shuttle additive for overcharge protection

  • US 6,004,698 A
  • Filed: 08/21/1997
  • Issued: 12/21/1999
  • Est. Priority Date: 08/21/1997
  • Status: Expired due to Term
First Claim
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1. A solid polymer electrolyte rechargeable electrochemical cell having a positive electrode, a negative electrode, a solid polymer electrolyte comprising a polyether polymer, and an organic redox shuttle additive selected from the group consisting of an alkali metal salt of 1,2,4-triazole, an alkali metal salt of imidazole, 2,3,5,6-tetramethylpyrazine, 1,3,5-tricyanobenzene and a dialkali metal salt of 3-4-dihydroxy-3-cyclobutene-1.2-dione, to protect the cell against overcharging.

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