Electrolyte for rechargeable electrochemical cell
AssigneeEos Energy Storage, LLC
InventorsGeorge W. Adamson, Sara S. Bowers, Francis W. Richey
Life of this patent
Estimating the term…
Abstract
The present invention provides an aqueous electrolyte for use in rechargeable zinc-halide storage batteries that possesses improved stability and durability and improves zinc-halide battery performance. One aspect of the present invention provides an electrolyte for use in a secondary zinc bromine electrochemical cell comprising from about 30 wt % to about 40 wt % of ZnBr2 by weight of the electrolyte; from about 5 wt % to about 15 wt % of KBr; from about 5 wt % to about 15 wt % of KCl; and one or more quaternary ammonium agents, wherein the electrolyte comprises from about 0.5 wt % to about 10 wt % of the one or more quaternary ammonium agents.
Claims61
An electrolyte for use in a secondary static zinc halide electrochemical cell comprising:
- an aggregate concentration of from about 2.0 wt % to about 15.0 wt % of one or more quaternary ammonium agents, wherein the one or more quaternary ammonium agents comprises at least cetyltrimethylammonium chloride or cetyltrimethylammonium bromide.
An electrolyte for use in a secondary zinc bromine electrochemical cell comprising:
- from about 25 wt % to about 40 wt % of ZnBr2;
- from about 25 wt % to about 45 wt % of water;
- and
- one or more quaternary ammonium agents,
- wherein the electrolyte has an aggregate concentration of from about 2.0 wt % to about 15.0 wt % of the one or more quaternary ammonium agents, and wherein the one or more quaternary ammonium agents comprises at least
- cetyltrimethylammonium bromide, and
- an alkyl substituted pyridinium bromide, wherein the alkyl substituted pyridinium bromide is selected from 1-ethyl-2-methylpyridinium bromide, 1-ethyl-3-methylpyridinium bromide, or 1-ethyl-4-methylpyridinium bromide.
An electrolyte for use in a secondary zinc bromine electrochemical cell comprising:
- from about 25 wt % to about 40 wt % of ZnBr2;
- from about 25 wt % to about 45 wt % of water;
- and
- one or more quaternary ammonium agents,
- wherein the electrolyte has an aggregate concentration of from about 2.0 wt % to about 15.0 wt % of the one or more quaternary ammonium agents, and wherein the one or more quaternary ammonium agents comprises at least
- cetyltrimethylammonium bromide, and
- tetraethylammonium bromide.
An electrolyte for use in a secondary zinc bromine electrochemical cell comprising:
- from about 1.0 wt % to about 5 wt % of alkyl ammonium chloride;
- from about 25 wt % to about 40 wt % of ZnBr2;
- from about 25 wt % to about 45 wt % of water;
- and
The electrolyte of claim 58, further comprising from about 0.1 wt % to about 0.5 wt % of DME-PEG having an average molecular weight of from about 750 amu to about 1250 amu.
Dependencies are inferred from the claim text.