Synthesis of Nanostructured Fibers Consisting of Carbon Coated Mn3O4 Nanoparticles and Their Application in Electrochemical Capacitors

被引:16
作者
Chen, Li-Li [1 ,2 ]
Wu, Xing-Long [2 ]
Guo, Yu-Guo [2 ]
Kong, Qing-Shan [1 ]
Xia, Yan-Zhi [1 ]
机构
[1] Qingdao Univ, Adv Fibers & Modern Textile Cultivat Base State K, Qingdao 266071, Peoples R China
[2] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
基金
中国国家自然科学基金;
关键词
Nanostructured Fibers; Carbon Coated Mn3O4 Nanoparticles; Supercapacitor; Manganese Alginate; Energy Storage; MANGANESE OXIDE; LOW-TEMPERATURE; POLYMER FIBERS; SUPERCAPACITOR; LITHIUM; NANOFIBERS; ELECTRODES; BATTERIES; RUO2;
D O I
10.1166/jnn.2010.3017
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Nanostructured composite fibers consisting of carbon coated Mn3O4 nanoparticles (Mn3O4@C) were prepared from thermal decomposition of manganese alginate fibers produced by wet-spinning technique, and investigated with SEM, TEM, XRD, nitrogen adsorption-desorption isotherms, and electrochemical tests toward energy storage. It is found that the as-obtained Mn3O4@C fibers consist of plenty of nano-sized Mn3O4 crystals with even diameter of 10-15 nm and carbon coating layer with a thickness of 1-2 nm. The composite fibers exhibit also a porous structure consisting of both micropores and mesopores. The electrochemical performances of Mn3O4@C fibers were examined by cyclic voltammetry and galvanostatic charge-discharge techniques. The results indicate that Mn3O4@C fibers possess a higher specific capacitance and superior rate capability when used as electrode materials for supercapacitor compared with commercial Mn3O4. The improved performances of Mn3O4@C fibers can be attributed to the nano-dimension of Mn3O4 particles, the thin carbon coating layer and the nanopores existing among Mn3O4@C nanoparticles.
引用
收藏
页码:8158 / 8163
页数:6
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