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CuCo₂O₄ nanoneedle array with high stability for high performance asymmetric supercapacitors.

ABSTRACT: Cycling performance is very important to device application. Herein, a facile and controllable approach is proposed to synthesize high stability CuCo₂O₄ nanoneedle array on a conductive substrate. The electrode presents excellent performances in a large specific capacitance up to 2.62 F cm^-2 (1747 F g^-1) at 1 mV s^-1 and remarkable electrochemical stability, retaining 164% even over 70 000 cycles. In addition, the asymmetric supercapacitor assembled with the optimized CuCo₂O₄ nanoneedle array (cathode) and active carbon (anode), which exhibits superior specific capacity (146 F g^-1), energy density (57 W h kg^-1), and cycling stability (retention of 83.9% after 10 000 cycles). These outstanding performances are mainly ascribed to the ordered binder-free nanoneedle array architecture and holds great potential for the new-generation energy storage devices.

SUBMITTER: Zhang L

PROVIDER: S-EPMC9054572 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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CuCo2O4 nanoneedle array with high stability for high performance asymmetric supercapacitors.

Zhang Ling L Li Ruizhi R Li Weiqun W Li Rongcong R Li Chenliang C Zhou Yingke Y

RSC advances 20200615 38

Cycling performance is very important to device application. Herein, a facile and controllable approach is proposed to synthesize high stability CuCo2O4 nanoneedle array on a conductive substrate. The electrode presents excellent performances in a large specific capacitance up to 2.62 F cm-2 (1747 F g-1) at 1 mV s-1 and remarkable electrochemical stability, retaining 164% even over 70 000 cycles. In addition, the asymmetric supercapacitor as ...[more]

PMID: 35514599

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