Facile synthesis of morphology-controllable NiCo2S4 arrays on activated carbon textile as high-performance binder-free supercapacitor electrode

• Published in: Materials research bulletin Vol. 131; p. 110957
• Main Authors: Wang, Jian, Xie, Yu, Wang, Longcheng, Wang, Lina, Yue, Linhai, Jin, Dalai
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.11.2020
• Subjects: Flexible electrode; Nanostructure; NiCo2S4 arrays; Supercapacitor; Supercapacitor; NiCo2S4 arrays; Flexible electrode; Nanostructure
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/j.materresbull.2020.110957

[Display omitted] •NiCo2S4 arrays were fabricated on ACT by a facile one step hydrothermal method.•Morphology of the NiCo2S4 arrays was controled to be nanorods and nanosheets.•The NiCo2S4 arrays/ACT composite exhibits excellent electrochemical performance.•The composite also exhibits good electrochemical performance under stretching mode.•We report a flexible binder-free electrode for high performance supercapacitors. Binder-free electrodes provide great opportunities for the development of high-performance energy devices due to the absence of insulating and inactive binders. In this paper, NiCo2S4 arrays with attractive nanostructures were directly grown on activated carbon textile (ACT) by a facile one-pot hydrothermal method to develop a self-supported binder-free electrode. The nanostructures can be tuned from nanorods to nanosheets by simply controlling the concentration of the sulfur source. Both arrays exhibited battery-type behavior of the positive electrode, where the nanosheets arrays with relatively higher capacity of 183.2 mA h g−1 at 2 mA cm-2 and better cycling stability of 82.6 % capacitance retention after 1000 cycles was employed in an asymmetric supercapacitor (ASC) as positive electrode. The ASC exhibited excellent rate capability with the maximum specific energy of 56.2 Wh/kg and the specific power of 632.7 W/kg at the current density of 4 mA/cm2. The presented results are believed to be helpful to the design and application of promising flexible binder-free electrode for high-performance hybrid supercapacitors.