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
A method of manufacturing an electrochemical cell electrode, the method comprising:
- forming a first layer by coating a first active material composite onto a current collector substrate, wherein the first active material composite includes a plurality of first active material particles;
- forming a second layer by coating a second active material composite onto the first layer, wherein the second active material composite includes a plurality of second active material particles and a plurality of non-active ceramic particles, such that the second layer is configured to have a greater resistance to densification than the first layer;
- wherein the first layer, the second layer, and the current collector substrate collectively form a composite electrode;
- and
- calendering the composite electrode by applying a compressive force to an exposed face of the second layer;
- wherein calendering the electrode causes the first layer to be compressed to a greater degree than the second layer.
A method of manufacturing an electrochemical cell electrode, the method comprising:
- forming a first layer by coating a first active material composite onto a current collector substrate, wherein the first active material composite includes a plurality of first active material particles;
- forming a second layer by coating a second active material composite onto the first layer, wherein the second active material composite includes a plurality of second active material particles and a plurality of non-active particles having a hardness greater than that of the first active material particles, such that the second layer is configured to have a lower overall compressibility than the first layer;
- wherein the first layer, the second layer, and the current collector substrate collectively form a composite electrode;
- and
- causing the first layer to be compressed to a greater degree than the second layer by calendering the composite electrode.
A method of manufacturing an electrochemical cell electrode, the method comprising:
- forming a first layer by coating a first active material composite onto a current collector substrate, wherein the first active material composite includes a plurality of first active material particles;
- forming a second layer by coating a second active material composite onto the first layer, wherein the second active material composite includes a plurality of second active material particles and a plurality of non-active ceramic particles, each one of the plurality of non-active ceramic particles consisting of a non-active ceramic material, such that the second layer is configured to have a greater resistance to densification than the first layer;
- wherein the first layer, the second layer, and the current collector substrate collectively form a composite electrode;
- and
- calendering the composite electrode by applying a compressive force to an exposed face of the second layer;
- wherein calendering the electrode causes the first layer to be compressed to a greater degree than the second layer.
Dependencies are inferred from the claim text.