文献类型：期刊文献

英文题名：Morphology-controllable synthesis of MnO2 hollow nanospheres and their supercapacitive performance

作者：Ma, Jingping[1];Cheng, Qilin[1,2];Pavlinek, Vladimir[2];Saha, Petr[2];Li, Chunzhong[1]

机构：[1]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Tomas Bata Univ Zlin, Ctr Polymer Syst, Ctr Polymer, Zlin 76001, Czech Republic

年份：2013

卷号：37

期号：3

起止页码：722

外文期刊名：NEW JOURNAL OF CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000314973000025)】；

基金：This work was supported by the National Natural Science Foundation of China (20925621, 21236003, 21206043), the Shanghai Pujiang Program (12PJ1401900), the Fundamental Research Funds for the Central Universities and the Project sponsored by SRF for ROCS, SEM.

语种：英文

摘要：Uniform MnO2 hollow nanospheres with hierarchical (urchin-like and flower-like) and non-hierarchical structures have been synthesized via a dual-template assisted hydrothermal process. The morphology control of the MnO2 hollow spheres can be easily achieved by altering the mass ratio of Pluronic F-127 to silica spheres. Material characterizations reveal that urchin-like hollow spheres possess the highest BET surface area of 233.4 m(2) g(-1) among the diverse morphologies. A possible formation mechanism for the MnO2 hollow spheres with different morphologies is proposed. The supercapacitive performance of the MnO2 spheres was investigated by cyclic voltammetry and galvanostatic charge-discharge techniques. The urchin-like hollow spheres exhibit the highest specific capacitance of 266.6 F g(-1) within the potential range of 0-1.0 V. The relationship between the specific capacitance and the morphology of the MnO2 hollow spheres is also discussed. The good capacitive behavior and cycling stability of the hierarchical MnO2 hollow spheres highlights the importance of the morphological design and control of materials in practical supercapacitor applications.