Hierarchical Manganese Oxide/Carbon Nanocomposites for Supercapacitor Electrodes

作     者：Yiting Peng Zheng Chen Jing Wen Qiangfeng Xiao Ding Weng Shiyu He Hongbin Geng Yunfeng Lu 

作者机构：Department of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China Department of Chemical and Biomolecular Engineering University of California. Los Angeles CA 90095. USA 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2011年第4卷第2期

页      面：216-225页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：U.S. Department of Energy, USDOE Office of Science, SC Basic Energy Sciences, BES, (DE-SC0001342) 

主　　题：Hierarchically porous carbon MnO2/carbon nanocomposite supercapacitor 

摘      要：MnO2/carbon nanocomposites with hierarchical pore structure and controllable MnO2 loading have been synthesized using a self-limiting growth method. This was achieved by the redox reactions of KMnO4 with sacrificed carbon substrates that contain hierarchical pores. The unique pore structure allows the synthesis of nanocomposites with tunable MnO2 loading up to 83 wt.%. The specific capacitance of the nanocomposites increased with the MnO2 loading; the conductivity measured by electrochemical impedance spectroscopy, on the other hand, decreased with increasing MnO2 loading. Optimization of the MnO2 loading resulted in nanocomposites with high specific capacitance and excellent rate capability. This work provides important fundamental understanding which will facilitate the design and fabrication of high-performance supercapacitor materials for a large variety of applications.