Synthesis of NiCo2O4 onto carbon current collector films as the flexible electrode material for supercapacitors

• Published in: Journal of materials science. Materials in electronics Vol. 28; no. 16; pp. 11615 - 11623
• Main Authors: Wu, Shuang, Liu, Qing, Xue, Fei, Wang, Meixia, Yang, Shuhua, Xu, Hongyan, Jiang, Fenghua, Wang, Jieqiang
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.08.2017; Springer Nature B.V
• Subjects: Capacitance; Carbon; Carbon fibers; Carbon nanotubes; Characterization and Evaluation of Materials; Chemistry and Materials Science; Electrode materials; Electrodes; Materials Science; Nickel compounds; Optical and Electronic Materials; Substrates; Supercapacitors; Specific Capacitance; Carbon Fiber; High Specific Capacitance; Cyclic Voltammetry Curve; NiCo2O4
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-017-6963-x

NiCo 2 O 4 is one of the well-known pseudocapacitive material with higher specific capacitance. In this work, carbon nanotubes (CNT) integrated carbon fibers (CF) are used as the flexible substrate for the growth of NiCo 2 O 4 nanoneedle arrays by an in-situ hydrothermal approach to obtain NiCo 2 O 4 /CC flexible electrode for supercapacitors application. The NiCo 2 O 4 nanoneedles with diameters of 40–50 nm were formed on the hydroxyl-functionalized CC. This hybrid electrode NiCo 2 O 4 /CC not only exhibits a high specific capacitance of 249.69 F g −1 , but also shows a favourable cycling stability of 63.3% retention after 1000 cycles at high mass loading. In addition, the proposed method provides a simple and effective strategy for preparing flexible electrode materials for supercapacitor and enables the perfect combination of pseudocapacitance and double layer capacitance.