Fe2O3/N doped rGO anode hybridized with NiCo LDH/Co(OH)2 cathode for battery-like supercapacitor

By Huanji Liu, Juncheng Zhu, Zhong Li, Zhi-Ping Shi, Jiliang Zhu, Hua Mei. 2021

185 citations recorded by the source corpus.

Abstract In this work, a high-performance hybrid supercapacitor is assembled with N-doped reduced graphene oxide (N-rGO) decorated with Fe2O3 (Fe2O3/N-rGO) as the anode, and NiCo layered double hydroxide integrated with conductive Co(OH)2 (NiCo LDH/Co(OH)2) as the cathode. The two main pseudo-capacitive materials are modified by different materials (N-rGO and Co(OH)2) to enhance the conductivity. For anode, the Fe2O3 nanoparticles are uniformly dispersed on N-rGO via a facile solvent-thermal method. The highly conductive Fe2O3/N-rGO exhibits a superior capacitance of 912.9 F/g at 1 A/g and retains 84 % at 30 A/g. The NiCo LDH/Co(OH)2 cathode also synthesized by a convenient solvent-thermal method delivers a high specific capacitance of 2220.0 F/g at 1 A/g and retains 70 % at a high current density of 50 A/g. Utilizing these electrodes, we successfully fabricate a hybrid battery-like supercapacitor with an excellent energy density of 103.3 Wh/kg at an outstanding power density of 790 W/kg, an excellent capacitance of 296.3 F/g at 1 A/g and a remarkable cyclic stability with 92 % retention after 1000 cycles at 10 A/g. Due to the elaborately designed electrode materials, the battery-like supercapacitor exhibits excellent electrochemical properties and is an inspiration for future energy storage devices.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/607e33264ced1e7199eb0712aa2b0c0a3eb69609