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

Patent ·
OSTI ID:872773
 [1];  [2]
  1. Oakland, CA
  2. Moraga, CA
+ Show Author Affiliations

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.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
DOE Contract Number:
AC03-76SF00098
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 6004698
OSTI ID:
872773
Country of Publication:
United States
Language:
English

References (7)

Analysis of Redox Additive-Based Overcharge Protection for Rechargeable Lithium Batteries journal January 1991
Electrochemical Overcharge Protection of Rechargeable Lithium Batteries journal January 1988
Electrochemical Overcharge Protection of Rechargeable Lithium Batteries: II . Effect of Lithium Iodide‐Iodine Additives on the Behavior of Lithium Electrode in LiAsF6 Tetrahydrofuran Solutions journal January 1988
Applications of Metallocenes in Rechargeable Lithium Batteries for Overcharge Protection journal January 1992
Status of the development of rechargeable lithium cells journal January 1994
n-Butylferrocene for Overcharge Protection of Secondary Lithium Batteries journal January 1990
Polypyridine complexes of iron used as redox shuttles for overcharge protection of secondary lithium batteries journal April 1995

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Related Subjects

-8
/429/252/
10
2-dione
3-4-dihydroxy-3-cyclobutene-1
4-triazole
5-tricyanobenzene
6-tetramethylpyrazine
85
additive
additives
alkali
alkali metal
aromatics
cell
cell comprising
cell contain
cell containing
characterized
cm
coefficient
compounds
comprising
containing
containing aromatic
degree
described
dialkali
diffusion
diffusion coefficient
electrochemical
electrochemical storage
electrode
electrolyte
electrolyte electrochemical
examples
imidazole
metal
metal salt
negative
negative electrode
nitrogen-containing
onset
organic
overcharge
overcharge protection
polymer
polymer electrolyte
positive
positive electrode
potential
preferably
preferably comprising
protection
provide
provide overcharge
redox
redox shuttle
salt
shuttle
shuttle additive
shuttles
solid
solid polymer
storage
storage cell
temperature
times
volts