Wire– Type Nanoporous Dendritic Electrode for Flexible, Miniaturized Fiber Supercapacitors with Enhanced Electrochemical Performance
Paper ID : 1044-ICNS
Leila Naderi *1, Saeed Shahrokhian2
1Sharif university of technology, Tehran, Iran
2Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran‎ Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran
Flexible fiber-shaped supercapacitors (FSSCs) are recently of extensive interest for the next- generation portable and wearable electronic devices because of their attractive features such as miniature size, high flexibility, safety, and high power density. Herein, we have successfully fabricated three-dimensional (3D) current collector, a 3D porous dendritic film on a Cu-wire substrate by electrodeposition in the presence of hydrogen bubble template that leading to more efficient contact between the electroactive material and metal wire electrode for faradaic energy storage. Then, nickel hydroxide electroactive materials were grown onto a 3D porous film/Cu-wire current collector using the electrodeposition method. The prepared 3D, porous electrode exhibited remarkable electrochemical performance with high capacitance (12.2 F cm−2 at 4 mA cm-2), high rate capability and super cycling stability (100 % retention, even after 3500 cycles). An assembled fiber asymmetric microsupercapacitor containing nickel hydroxide coated 3D porous film/copper wire with reduced graphen oxide coated carbon fiber shows high energy density of 195μWh cm−2, high power density of 7643 μW cm−2, and 95.7% retention of initial capacity after 5000 cycles. These results proposes that the fabricated device has excellent potential for flexible and micro energy-related devices.
Microsupercapacitor, Flexible, Portable electronics, Porous structure, Wire electrode
Status : Abstract Accepted (Poster Presentation)