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YAN DONGXIAN1, QIN LIN1,* , FAN XIN1,* , ZHANG XIAOHUI2, PANG SHUHUA1,2
To meet people's requirements for high capacitance energy storage devices, the combination of two or even three materials with excellent properties enables electrode materials to have multiple mechanisms in electrochemical reaction at the same time, which improves electrochemical performance together. Herein, we have successfully synthesized rGO/metal oxide by Hummer's method and hydrothermal method and then further compounded with polypyrrole(PPy) by in-situ polymerization. The rGO/cobalt-nickel oxide/polypyrrole(rGO/NiCo/PPy) has a unique sea urchin-like structure coated with conductive polymer and its electrode displays large specific capacitance of 333.2 F/g at current density of 1 A/g. The ASC cell was assembled with rGO/NiCo/PPy as positive electrode and rGO/PPy as negative electrode. The specific capacitance of the ASC equipment attains up to 253 F/g at power density of 1250 W/kg. Then the specific capacitance remains 94% after 7000 charge and discharge cycles. Due to the escalation of specific surface area and the combination of bilayer capacitance with pseudocapacitance characteristics, the fundamental factors of the supervisor electrochemical characteristics are obtained. Furthermore, the asymmetric flexible supercapacitor equipment made of rGO/NiCo/PPy composite provides superior electrochemical performance.
Polypyrrole, Nickel-cobalt oxide, rGO, Supercapacitor, Electrochemical performance.
YAN DONGXIAN, QIN LIN, FAN XIN, ZHANG XIAOHUI, PANG SHUHUA, Fabrication of rGO/cobalt-nickel oxide/polypyrrole composites and their electrochemical performance, Optoelectronics and Advanced Materials - Rapid Communications, 18, 1-2, January-February 2024, pp.66-75 (2024).
Submitted at: March 7, 2022
Accepted at: Feb. 9, 2024
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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