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

A class of organic redox shuttle additives is described, preferably comprising nitrogen-containing aromatics compounds, which can be used in a high temperature (85.degree. C. or higher) electrochemical storage cell comprising a positive electrode, a negative electrode, and a solid polymer electrolyte to provide overcharge protection to the cell. The organic redox additives or shuttles are characterized by a high diffusion coefficient of at least 2.1.times.10.sup.-8 cm.sup.2 /second and a high onset potential of 2.5 volts or higher. Examples of such organic redox shuttle additives include 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.
Authors:
 [1] ;  [2]
  1. (Oakland, CA)
  2. (Moraga, CA)
Publication Date:
OSTI Identifier:
872773
Report Number(s):
US 6004698
DOE Contract Number:
AC03-76SF00098
Resource Type:
Patent
Research Org:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
Country of Publication:
United States
Language:
English
Subject:
solid; polymer; electrolyte; electrochemical; storage; cell; containing; redox; shuttle; additive; overcharge; protection; organic; redox; shuttle; additives; described; preferably; comprising; nitrogen-containing; aromatics; compounds; temperature; 85; degree; electrochemical; storage; cell; comprising; positive; electrode; negative; electrode; solid; polymer; electrolyte; provide; overcharge; protection; cell; organic; redox; additives; shuttles; characterized; diffusion; coefficient; times; 10; -8; cm; onset; potential; volts; examples; organic; redox; shuttle; additives; alkali; metal; salt; 4-triazole; alkali; metal; salt; imidazole; 6-tetramethylpyrazine; 5-tricyanobenzene; dialkali; metal; salt; 3-4-dihydroxy-3-cyclobutene-1; 2-dione; preferably comprising; diffusion coefficient; shuttle additive; shuttle additive; shuttle additive; electrochemical storage; electrochemical storage; positive electrode; negative electrode; alkali metal; alkali metal; alkali metal; metal salt; metal salt; metal salt; polymer electrolyte; polymer electrolyte; solid polymer; solid polymer; electrolyte electrochemical; cell comprising; cell containing; redox shuttle; redox shuttle; redox shuttle; storage cell; storage cell; overcharge protection; overcharge protection; provide overcharge; cell contain; containing aromatic /429/252/