文献类型：期刊文献

英文题名：High-rate electrochemical capacitors from highly graphitic carbon-tipped manganese oxide/mesoporous carbon/manganese oxide hybrid nanowires

作者：Jiang, Hao[1,2];Yang, Liping[2];Li, Chunzhong[1];Yan, Chaoyi[3];Lee, Pooi See[3];Ma, Jan[2,3]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat Minist Educ, Shanghai 200237, Peoples R China;[2]Nanyang Technol Univ, Temasek Labs, Singapore 637553, Singapore;[3]Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

年份：2011

卷号：4

期号：5

起止页码：1813

外文期刊名：ENERGY & ENVIRONMENTAL SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000289989800032)】；

基金：This work was supported by the National Natural Science Foundation of China (20925621), the Program of Shanghai Subject Chief Scientist (08XD1401500), and the Shanghai Shuguang Scholars Tracking Program (08GG09). The authors acknowledge Dr J. Yan for the valuable discussions.

语种：英文

摘要：In this paper, using manganese oxide as an example, we report the successful design and synthesis of a novel one-dimensional highly graphitic carbon-tipped manganese oxide/mesoporous carbon/manganese oxide hybrid nanowire. The unique structure significantly improves the conductivity of metal oxide materials, which is a key limitation in pseudocapacitors. The hybrid nanowire with optimal carbon content, when applied as an electrode, exhibits superior capacitive properties in 1 M Na2SO4 aqueous solution, such as high specific capacitance (266 F g(-1) at 1 A g(-1)), excellent rate capability (56.4% capacity retention at 60 A g(-1)) and outstanding cycling stability (without degradation after 1200 cycles). The energy densities achieved can be as high as 20.8 Wh kg(-1), at a power density of 30 kW kg(-1). The results demonstrated that the manganese oxide in our hybrid nanomaterial was efficiently utilized with the assistance of the highly conductive graphitic carbon-tipped mesoporous carbon shell. It is reckoned that the present low-cost novel hybrid nanowire can serve as a promising electrode material for supercapacitors and other electrochemical devices.