The facile and cost-effective preparation of supercapacitor electrodes is significant for the application of this kind of electrochemical energy-storing module. In this work, we designed a feasible strategy to fabricate a binary active material onto a current collector in one step. A colloidal mixture of graphene oxide and pyrrole layered on a carbon cloth could undergo a redox reaction through a mild hydrothermal process to yield a reduced graphene oxide/polypyrrole hydrogel film anchored onto the carbon cloth. The integrated electrode with the porous graphene/polypyrrole active material could be directly utilized as a freestanding working electrode for electrochemical measurements and the assembly of supercapacitor devices. The as-prepared electrode could achieve a high capacitance of 1221 mF cm -2 at 1 mA cm -2 (531 F g -1 ) with satisfactory cycling stability. The constructed symmetric supercapacitor with two optimal electrodes could provide an energy density of 70.4 μWh cm -2 (15.3 Wh kg -1 ). This work offers a feasible pathway toward the integration of graphene/conducting polymer composites as electrochemical electrodes.
Keyphrases
- reduced graphene oxide
- gold nanoparticles
- carbon nanotubes
- molecularly imprinted
- room temperature
- ionic liquid
- label free
- drug delivery
- tissue engineering
- electron transfer
- wastewater treatment
- walled carbon nanotubes
- solid phase extraction
- mass spectrometry
- high resolution
- heavy metals
- hyaluronic acid
- metal organic framework
- liquid chromatography
- anaerobic digestion