3D-architectured nickel–cobalt–manganese layered double hydroxide/reduced graphene oxide composite for high-performance supercapacitor

• DOI: 10.1016/j.cplett.2015.10.003
• Publication Date: 2015-10-19T18:39:43Z
• Authors: M. Li; J.P. Cheng; F. Liu; X.B. Zhang
• Keywords: Cobalt oxide

Abstract Pure flower-like NiCoMn layered double hydroxide (LDH) and 3D-architectured NiCoMn LDH/reduced graphene oxide (rGO) composite are fabricated by a solution method. The NiCoMn hydroxide nanoflakes are tightly deposited on the surface of rGO. Electrochemical measurements prove that rGO can greatly improve its capacitive performances, compared with the pure counterpart. A high-specific capacitance of 912 F g−1, high-rate capability and long cycle life are achieved for the composite. A NiCoMn LDH/rGO//activated carbon hybrid capacitor is also fabricated. It possesses a high-specific capacitance of 206 F g−1 and an energy density of 92.8 W h kg−1 in 1.8 V.