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US 9,005,311 B2Granted
Electrode active surface pretreatment
AssigneeSion Power Corporation
InventorsMarina Safont-Sempere, Chariclea Scordilis-Kelley
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Abstract
Electrode structures and methods of formation are provided. The formation process may include an initial high rate discharge to precondition the electrode active surface. The resulting electroactive surface may have reduced pitting and defects resulting in more uniform utilization of the electrode during subsequent cycling.
Claims24
A method comprising:
- providing an anode comprising:
- a first electroactive layer comprising an active electrode species, the first electroactive layer having a first capacity;
- a second electroactive layer comprising the active electrode species, the second electroactive layer having a second capacity;
- and
- an ion conductive protective layer disposed between the first and second electroactive layers;
- discharging the anode to a depth of discharge corresponding to at least the second capacity, thereby substantially removing the active electrode species from the second electroactive layer during the first discharge;
- and
- depositing at least a portion of the active electrode species in the first electroactive layer through the ion conductive layer during at least one charge.
5 more elements
Dependencies are inferred from the claim text.