物理化学学报Issue(5)：899-907,9.DOI:10.3866/PKU.WHXB201403261
MnO2/NiCo2O4的静电自组装合成及其电化学性能
Synthesis of a MnO2/NiCo2O4 Composite by Electrostatic Self-Assembly and Its Electrochemical Performance
摘要
Abstract
A hetero-layered MnO2/NiCo2O4 composite was fabricated according to an electrostatic self-assembly process between negatively charged MnO2-layered nanosheets and positively charged Co-Ni-layered double hydroxide nanosheets, fol owed by a heat-treatment process. The morphology, composition, and microstructure characteristics of the resulting material were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectrometry, atomic absorption spectrometry (AAS), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). Furthermore, the electrochemical behaviors of the composite were evaluated by cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS). The test results indicated that the hetero-layered composite showed porous stacking structure, which increased the effective liquid-solid interfacial area, and provided a fast path for the insertion and extraction of electrolyte ions. A specific capacitance of 482 F∙g-1 was obtained in the potential window from -0.6 to 0.45 V at a current density of 1 A∙g-1. These values were therefore superior to those of pure MnO2 or pure NiCo2O4.关键词
静电自组装/MnO2/NiCo2O4/层状堆垛结构/电化学性能Key words
Electrostatic self-assembly/MnO2/NiCo2O4/Layered stacking structure/Electrochemical performance分类
化学化工引用本文复制引用
李丽,胡中爱,杨玉英,吴红英,崔璐娟..MnO2/NiCo2O4的静电自组装合成及其电化学性能[J].物理化学学报,2014,(5):899-907,9.基金项目
The project was supported by the National Natural Science Foundation of China (20963009,21163017), Specialized Research Fund for the Doctoral Program of Higher Education, China (20126203110001), and Fundamental Research Funds for the Central Universities, China (zyz2012064).国家自然科学基金(20963009,21163017),高等学校博士学科点专项科研基金(20126203110001)和中央高校基本科研业务费专项资金(zyz2012064)资助 （20963009,21163017）
