Electrolyte composition for a zinc-halide battery and bipolar electrode comprising a titanium carbide coated cathode box
AssigneeEos Energy Storage, LLC
InventorsGeorge W. Adamson, Sara S Bowers
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Abstract
The present invention provides a bipolar electrode that is useful in zinc-halide electrochemical cells or battery stacks. The bipolar electrode comprises a titanium bipolar electrode plate wherein a cathode assembly is disposed on a front surface of the electrode plate. The cathode assembly comprises a titanium cathode cage, a separator, and carbon material, wherein the cathode cage holds the carbon material in electrical communication with the front surface of the electrode plate.
Claims50
A bipolar electrode comprising:
- a bipolar electrode plate, the bipolar electrode plate comprising a front surface and a back surface;
- and
- a cathode assembly comprising
- a carbon material;
- a separator;
- and
- a cathode cage,
- wherein the cathode cage holds the carbon material in electrical communication with the front surface of the bipolar electrode plate, and the bipolar electrode plate and the cathode cage comprise a titanium material.
A rechargeable bipolar electrochemical cell comprising:
- an aqueous zinc-halide electrolyte;
- a bipolar electrode comprising
- a bipolar electrode plate, the bipolar electrode plate comprising a first titanium material;
- a carbon material;
- a cathode cage that holds the carbon material in electrical communication with a front surface of the bipolar electrode plate, the cathode cage comprising a second titanium material;
- and
- a separator interposed between at least a portion of the cathode cage and the carbon material;
- and
- a terminal endplate parallel with and adjacent to the first bipolar electrode plate, the terminal endplate comprising a second titanium material, the terminal endplate having an inner surface that opposes the front surface of the first bipolar electrode, and at least a portion of the inner surface is a rough surface,
- wherein the bipolar electrode and the terminal endplate are at least partially disposed in the electrolyte.
A rechargeable bipolar zinc-halide battery stack comprising:
- a plurality of bipolar electrodes;
- a terminal cathode assembly;
- a terminal anode assembly;
- and
- an aqueous zinc-halide electrolyte,
- wherein each bipolar electrode comprises a cathode cage, a carbon material, a separator, and a bipolar electrode plate;
- the terminal cathode assembly comprises a first terminal endplate;
- the terminal anode assembly comprises a second terminal endplate;
- the bipolar electrode plate, the cathode cage, the first terminal endplate, and the second terminal endplate each comprise a titanium material and are at least partially coated with titanium carbide.
Dependencies are inferred from the claim text.