Facile synthesis of reduced graphene oxide/NiMn2O4 nanorods hybrid materials for high-performance supercapacitors

作者：Wang, Zhongbing^*; Zhu, Zihao; Zhang, Chunlei; Xu, Chengqiao; Chen, Chunnian

来源：Electrochimica Acta, 2017, 230: 438-444.

DOI：10.1016/j.electacta.2017.02.023

• Hybrid materials
• NiMn2O4 nanorods
• Graphene
• Supercapacitors

We report a mild strategy to synthesize reduced graphene oxide/spinel nickel manganese oxide (rGO/NiMn2O4) nanorods composites. The rGO/NiMn2(C2O4)(3) precursors were prepared via coprecipitation method in ethanol-water system and the composites were obtained by calcining the precursors in air. The hybrid materials have been characterized by X-ray powder diffraction, Raman spectra, X-Ray photoelectron spectroscopy, high-resolution transmission electron microscopy and field emission scanning electron microscopy. Different electrochemical measurements have been used in a three electrode system to study the electrochemical performance such as cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy. The typical hybrid materials (30 wt% rGO) display a high specific capacitance (693.00 Fg(-1) at 1 Ag-1) and prominent cycling stability (91.38% capacitance retention after 2000 cycles at 5 Ag-1), indicating that the composites possess potential application as excellent electrode material.

• 出版日期2017-3-10
• 单位合肥工业大学