Electrodeposited Ni Co layered double hydroxides on titanium carbide as a binder-free electrode for supercapacitors

• DOI: 10.1016/j.electacta.2017.12.139
• Publication Date: 2017-12-22T08:04:37Z
• Authors: H. Li; F. Musharavati; E. Zalenezhad; X. Chen; K.N. Hui; K.S. Hui
• Keywords: Titanium carbide; Layered double hydroxides; Power density; Carbon fibers

Abstract We report the synthesized mixture of MXene and Ni Co LDH on nickel foam by an electrodeposition technique. The specific capacitance of the mixture attained 983.6 F g−1 at a discharge current of 2 A g−1, which is greater than that of pure MXene. Compared to Ni Co LDH, the sample created through electrodeposition provided a better rate capability of 983.6 F g−1 at 2 A g−1 and 536.6 F g−1 at 50 A g−1 and cycling stability with 76% retention after 5000 cycles at 30 A g−1. Moreover, a solid-state asymmetric supercapacitor with MXene-LDH as the positive electrode and multi-walled carbon nanotube coated on the nickel foam as the negative electrode delivers high energy density (36.70 Wh kg−1 at the power density of 1.44 kW kg−1), which outperforms the other devices reported previously.