Devices and methods for high voltage and solar applications
AssigneesThe Regents of the University of California, Nanotech Energy, Inc.
InventorsMaher F. El-Kady, Richard B. Kaner, Jack Kavanaugh
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Abstract
Provided herein are devices comprising one or more cells, and methods for fabrication thereof. The devices may be electrochemical devices. The devices may include three-dimensional supercapacitors. The devices may be microdevices such as, for example, microsupercapacitors. In some embodiments, the devices are three-dimensional hybrid microsupercapacitors. The devices may be configured for high voltage applications. In some embodiments, the devices are high voltage microsupercapacitors. In certain embodiments, the devices are high voltage asymmetric microsupercapacitors. In some embodiments, the devices are integrated microsupercapacitors for high voltage applications.
Claims23
An electrochemical system comprising, a planar array of interconnected electrochemical cells comprising:
- three or more first electrodes, each first electrode comprising three or more first microelectrodes;
- three or more second electrodes, each second electrode comprising three or more second microelectrodes, wherein each first microelectrode is interdigitated with one second microelectrode to form one electrochemical cell,
- wherein at least one of the first electrodes and the second electrodes comprises a three-dimensional interconnected corrugated carbon-based network (ICCN) comprising a plurality of expanded and interconnected carbon layers, and a pseudocapacitive material,
- wherein the pseudocapacitive material comprises ultrathin nanoflakes up to 20 nm thick.
A method for fabricating an electrochemical system, comprising:
- forming a carbonaceous film;
- forming a carbonaceous framework from the carbonaceous film comprising a three-dimensional interconnected corrugated carbon-based network (ICCN) comprising a plurality of expanded and interconnected carbon layers;
- patterning the carbonaceous framework to form an array of two or more cells in one step, wherein the array of two or more cells comprises three or more first electrodes, each first electrode comprising three or more first microelectrodes, and three or more second electrodes, each second electrode comprising three or more second microelectrodes, wherein each first microelectrode is interdigitated with one second microelectrode to form one electrochemical cell;
- and
- electrodepositing a pseudocapacitive material onto the three or more first electrodes, the three or more second electrodes, or both.
- forming a charge storing active material comprising the three-dimensional ICCN having a plurality of pores from the carbonaceous film;
- patterning the three-dimensional ICCN to form the array of two or more cells, wherein each cell comprises at least two electrodes;
- and
- electrodepositing pseudocapacitive nanostructures within at least a portion of the plurality of pores, wherein the pseudocapacitive nanostructures comprise ultrathin nanoflakes up to 20 nm thick.
Dependencies are inferred from the claim text.