Structures for interdigitated finger co-extrusion
View Patent ↗An electrode structure has an interdigitated layer of at least a first material and a second material, the second material having either higher or similar electrical conductivity of the first material and being more ionically conductivity than the first material, a cross-section of the two materials being non-rectangular.
1. An electrode structure, comprising:
an interdigitated layer of alternating regions of at least a first material and a second material, the second material:
having one of either higher or similar electrical conductivity of the first material;
being more ionically conductive than the first material;
having a higher porosity than the first material; and
having less active material than the first material;
wherein a cross-section of the two materials is trapezoidal, the electrode structure being one of either a cathode or an anode residing adjacent a separator such that the alternating portions alternate in a stacking direction, wherein the stacking direction is parallel to one of either the cathode or anode, resulting in the porosity alternating between a higher and lower porosity in contact with either the cathode or anode.
2. The structure of claim 1 , wherein the trapezoidal cross-section has sharp corners.
3. The structure of claim 1 , wherein the trapezoidal cross-section has rounded corners.
4. The structure of claim 1 , wherein the interdigitated layer comprises one of a wavy or undulating pattern.
5. The structure of claim 1 , wherein the interdigitated layer comprises a straight monolithic pattern in a print direction.
6. The structure of claim 1 , wherein the cross-section of the two materials being trapezoidal comprises stripes of materials with widths narrower at one end than at an opposite end.
7. The structure of claim 1 , wherein the cross-section of the two materials being trapezoidal comprises a widening stripe of one material and a narrowing stripe of the other.