Brush-like nickel ferrite nanosheets decorated CuCo2O4/CuO nanowire arrays as high-performance electrode for all-solid-state asymmetric supercapacitors. Issue 11 (1st June 2021)

• Record Type: Journal Article
• Authors: Feng, Xuansheng; Zhao, Guochen; Zhou, Jixue; Chen, Pu; Li, Chao
• Is Part Of: Ceramics international. Volume 47:Issue 11(2021)
• Page Start: 15958
• Page End: 15967
• Publication Date: 2021-06-01
• Subjects: High energy density -- Binder-free electrode -- Outstanding specific capacitance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.02.170
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The inferior energy density limits the practical application and sustainable development of supercapacitors. Excellent electrode materials can effectively improve the specific capacitance and operating potential window. Thus, we deposit brush-like nickel ferrite (NiFe2 O4 ) nanosheets and CuCo2 O4 /CuO nanowire arrays to construct a binder-free electrode with tree-like CuCo2 O4 /CuO/NiFe2 O4 arrays. The resulting CuCo2 O4 /CuO/NiFe2 O4 electrode shows an outstanding specific capacitance (2067 F/g) and wide potential window (−0.1-0.6 V). The contribution rate of surface faradaic redox reaction is calculated to be 71% at 1 mV/s and assembled CuCo2 O4 /CuO/NiFe2 O4 //AC device realizes a remarkable energy density (77.1 Wh/kg at power density of 851.4 W/kg) and cyclic performance (92.9% of initial specific capacitance retained after 10, 000 cycles). Apparently, the CuCo2 O4 /CuO/NiFe2 O4 electrode as a novel binder-free electrode has great application potential and our work offers a novel idea to construct the arrays of multicomponent composite materials.