CuCo2O4 nanoneedle array with high stability for high performance asymmetric supercapacitors. Issue 38 (15th June 2020)

• Record Type: Journal Article
• Authors: Zhang, Ling; Li, Ruizhi; Li, Weiqun; Li, Rongcong; Li, Chenliang; Zhou, Yingke
• Is Part Of: RSC advances. Volume 10:Issue 38(2020)
• Page Start: 22775
• Page End: 22782
• Publication Date: 2020-06-15
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0ra03771k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The CuCo2 O4 nanoneedle array with enhanced electrochemical performance especially high stability is due to the hierarchical porosity framework with the high mesoporous nanoneedle array. Abstract : Cycling performance is very important to device application. Herein, a facile and controllable approach is proposed to synthesize high stability CuCo2 O4 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 CuCo2 O4 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.