Flexible Fiber Asymmetric Micro–supercapacitors Fabrication Using NiMoO4 Nanorods Grown on 3D Porous Wire Current Collectors
Paper ID : 1045-ICNS
Authors:
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
Abstract:
Cu wires are coated by porous Ni film as current collectors by facile and cost-effective electrochemical methods in the presence of hydrogen bubble template. The high electrical/thermal conductivity of metal Cu wire and porous Ni film for growth of electroactive materials such as NiMoO4 nanorods can be beneficial for 3D porous current collectors. Furthermore, the metal Cu wire current collectors have excellent mechanical strength and flexibility. The porous Ni substrate would provide highly conductive networks, accelerate electrolyte penetration and short diffusion path lengths to facilitate electron transportation and increase the electroactive sites. NiMoO4 nanorods are hydrothermally grown on the porous Ni substrates to form flexible binder-free electrodes for fiber-shaped supercapacitors (FSSCs). The fabricated 3D porous electrode showed a higher electrochemical performance, such as areal and volumetric specific capacitance, rate capability and cyclic stability. Fiber asymmetric supercapacitor is then fabricated by binder-free electrodes of NiMoO4 nanorods grown on porous Ni layer coated Cu wire and RGO coated carbon fiber. The assembled device can be operated at the voltage range of 0 – 1.7 V and delivers a maximum energy (EA: 202 mWh cm–2) and power (PA: 13530 mW cm–2) density, which is higher than previous reported wire- typed supercapacitors.
Keywords:
3D current collector, Fiber micro–supercapacitor, Porous layer, Wire– type electrode, Flexible
Status : Abstract Accepted (Poster Presentation)