ELECTRODE FOR ENERGY STORAGE DEVICE
An energy storage device electrode product is provided. The product comprises: at least one current collector and at least one electrode film disposed adjacent to the at least one current collector. The at least one current collector comprises a plurality of voids extending through a thickness of the current collector, wherein the plurality of voids allow electrolyte to flow through the thickness of the current collector. The plurality of voids extending through the current collector is formed without reducing a surface area of a conductive material of the current collector disposed adjacent to the electrode by more than about fifty percent. A method of producing an electrode product and a double layer capacitor product are also disclosed.
1 . An energy storage device electrode product comprising:
at least one current collector comprising plurality of voids extending through a thickness of the current collector, wherein the plurality of voids allow electrolyte to flow through the thickness of the current collector;
at least one electrode film disposed adjacent to and coupled to the at least one current collector,
wherein the plurality of voids extending through the current collector is formed without reducing a surface area of a conductive material of the current collector disposed adjacent to the electrode by more than about fifty percent.
2 . An energy storage device electrode product according to claim 1 wherein the plurality of voids is formed without substantially reducing a surface area of a conductive material of the current collector disposed adjacent to the electrode.
3 . An energy storage device electrode product according to claim 1 wherein the plurality of voids comprise a plurality of perforations.
4 . An energy storage device electrode product according to claim 1 wherein the plurality of voids comprise a plurality of slits.
5 . An energy storage device electrode product according to claim 1 wherein the plurality of voids comprise a plurality of punches.
6 . An energy storage device electrode product according to claim 1 wherein the energy storage device electrode product comprises a jellyroll-type electrode cell design.
7 . An energy storage device electrode product according to claim 1 wherein the energy storage device electrode product comprises an electrode of a stacked energy storage device design.
8 . An energy storage device electrode product according to claim 1 wherein the energy storage device electrode product comprises an electrode of a double layer capacitor.
9 . An energy storage device electrode product according to claim 1 wherein the plurality of voids are formed within a center portion of a width of the current collector.
10 . A method of preparing an energy storage device electrode product comprising:
providing an electrode;
providing a current collector;
disposing the current collector adjacent to the electrode; and
creating a plurality of voids extending through a thickness of the current collector,
wherein the plurality of voids extending through the thickness of the current collector is formed without reducing a surface area of a conductive material of the current collector disposed adjacent to the electrode by more than about fifty percent.
11 . A method of preparing an energy storage device electrode product according to claim 10 wherein the plurality of voids is formed without substantially reducing a surface area of a conductive material of the current collector disposed adjacent to the electrode.
12 . A method of preparing an energy storage device electrode product according to claim 10 wherein the plurality of voids comprise a plurality of perforations.
13 . A method of preparing an energy storage device electrode product according to claim 10 wherein the plurality of voids comprise a plurality of slits.
14 . A method of preparing an energy storage device electrode product according to claim 10 wherein the plurality of voids comprise a plurality of punches.
15 . A method of preparing an energy storage device electrode product according to claim 10 wherein the energy storage device electrode product comprises a jellyroll-type electrode cell design.
16 . A method of preparing an energy storage device electrode product according to claim 10 wherein the energy storage device electrode product comprises an electrode of a stacked energy storage device design.
17 . A method of preparing an energy storage device electrode product according to claim 10 wherein the energy storage device electrode product comprises an electrode of a double layer capacitor.
18 . A double layer capacitor comprising:
a first electrode comprising a first side and a second side, the first electrode comprising activated carbon and a binder;
a first current collector comprising a sheet of conductive material, the first current collector disposed adjacent the first side of the first current collector, wherein the first current collector comprises a plurality of voids extending through a thickness of the current collector, wherein the plurality of voids extending through the thickness of the current collector is formed without reducing a surface area of a conductive material of the current collector disposed adjacent to the electrode by more than about fifty percent;
a second electrode comprising a first side and a second side, the second electrode comprising activated carbon and a binder;
a second current collector disposed adjacent the first side of the second current collector; and
a separator disposed between the second side of the first electrode and the second side of the second electrode,
wherein the first electrode, the first current collector, the second electrode, the second current collector, and the separator are immersed in an electrolyte.
19 . A double layer capacitor according to claim 18 wherein the plurality of voids is formed without substantially reducing a surface area of a conductive material of the current collector disposed adjacent to the electrode.
20 . A double layer capacitor according to claim 18 wherein the plurality of voids comprise a plurality of perforations.
21 . A double layer capacitor according to claim 18 wherein the plurality of voids comprise a plurality of slits.
22 . A double layer capacitor according to claim 18 wherein the plurality of voids comprise a plurality of punches.
23 . A double layer capacitor according to claim 18 wherein the first electrode, first current collector, second electrode, second current collector, and separator are arranged in a jellyroll-type electrode cell design.
24 . A double layer capacitor according to claim 18 wherein the energy storage device electrode product comprises an electrode of a stacked energy storage device design.
25 . A double layer capacitor according to claim 18 wherein the plurality of voids are formed within a center portion of a width of the first current collector.