Electrochemical cells having improved ionic conductivity
AssigneeEnPower, Inc.
InventorAdrian YAO
Life of this patent
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Abstract
Electrochemical cells of the present disclosure may include one or more multilayered electrodes. One or both multilayered electrodes may be configured such that a second layer farther from the current collector has a higher resistance to densification than a first layer closer to the current collector. This may be achieved by including a plurality of non-active ceramic particles in the second layer. Accordingly, calendering of the electrode results in a greater compression of the first layer, and a beneficial porosity profile is created. This may improve the ionic conductivity of the electrode, as compared with known systems.
Claims20
1-9. (Previously Canceled)
An electrochemical cell comprising:
- a first electrode and a second electrode on opposing sides of a separator, the first electrode including an active material composite layered onto a current collector substrate;
- wherein the active material composite of the first electrode comprises:
- a first layer adjacent to and in contact with the current collector substrate, the first layer including a plurality of first active material particles;
- a second layer intermediate the first layer and the separator, the second layer including a plurality of second active material particles mixed with a plurality of non-active ceramic particles, each one of the plurality of non-active ceramic particles consisting of a an electrically non-conductive ceramic material, such that the second layer is configured to have a higher pore volume fraction than the first layer.
19-20. (canceled)
An electrochemical cell comprising:
- a first electrode and a second electrode on opposing sides of a separator, the first electrode including an active material composite layered onto a current collector substrate;
- wherein the active material composite of the first electrode comprises:
- a first layer adjacent to and in contact with the current collector substrate, the first layer including a plurality of first active material particles;
- a second layer intermediate the first layer and the separator, the second layer including a plurality of second active material particles mixed with a plurality of non-active ceramic particles, each one of the plurality of non-active ceramic particles consisting of an electrochemically inactive ceramic material, such that the second layer is configured to have a higher pore volume fraction than the first layer.
Dependencies are inferred from the claim text.