Method for control of edge effects of oxidant electrode
First Claim
1. A method of discharging an electrical energy storage device comprising the steps;
- 1. providing a first electrode comprised on an electrochemically reducible substance;
2. providing a porous electrode having a first and second exterior face with a cavity formed in the interior between said exterior faces, thereby having first and second interior faces positioned opposite the first and second exterior faces;
3. providing a current carrying electrolyte between said electrodes;
4. passing an oxidant through said porous electrode;
5. screening the porous electrode thereby decreasing its electrochemical activity by blocking the interior face a greater amount than the respective exterior face of the porous electrode, thereby maintaining a differential of electrode surface area between the interior face and the exterior face; and
6. closing the circuit between the first electrode and the porous electrode, thereby oxidizing the substance at the first electrode and reducing the oxidant at the porous electrode.
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Accused Products
Abstract
Described is an electrode assembly comprising;
a. a porous electrode having a first and second exterior face with a cavity formed in the interior between said exterior faces thereby having first and second interior faces positioned opposite the first and second exterior faces;
b. a counter electrode positioned facing each of the first and second exterior faces of the porous electrode;
c. means for passing an oxidant through said porous electrode; and
d. screening means for blocking the interior face of the porous electrode a greater amount than the blocking of the respective exterior face of the porous electrode, thereby maintaining a differential of oxidant electrode surface between the interior face and the exterior face.
The electrode assembly is useful in a metal, halogen, halogen hydrate electrical energy storage device.
12 Citations
9 Claims
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1. A method of discharging an electrical energy storage device comprising the steps;
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1. providing a first electrode comprised on an electrochemically reducible substance; 2. providing a porous electrode having a first and second exterior face with a cavity formed in the interior between said exterior faces, thereby having first and second interior faces positioned opposite the first and second exterior faces; 3. providing a current carrying electrolyte between said electrodes; 4. passing an oxidant through said porous electrode; 5. screening the porous electrode thereby decreasing its electrochemical activity by blocking the interior face a greater amount than the respective exterior face of the porous electrode, thereby maintaining a differential of electrode surface area between the interior face and the exterior face; and 6. closing the circuit between the first electrode and the porous electrode, thereby oxidizing the substance at the first electrode and reducing the oxidant at the porous electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification