Coating MnO2 nanowires by silver nanoparticles for an improvement of capacitance performance

被引：8
|
作者：
Dai, Y. M. [1 ,2 ,3 ]
Tang, S. C. [1 ,2 ]
Ba, Z. X. [3 ]
Zhu, S. S. [3 ]
Wang, Q. [3 ]
Wang, C. [3 ]
Meng, X. K. [1 ,2 ]
机构：
[1] Nanjing Univ, Inst Mat Engn, Natl Lab Solid State Microstruct, Nanjing, Jiangsu, Peoples R China
[2] Nanjing Univ, Coll Engn & Appl Sci, Nanjing, Jiangsu, Peoples R China
[3] Nanjing Inst Technol, Sch Mat Engn, Nanjing, Jiangsu, Peoples R China
来源：
MATERIALS LETTERS | 2014年 / 117卷
基金：
中国国家自然科学基金;
关键词：
Manganese oxide; Composites; Supercapacitor; Structural stability; ELECTRODES;
D O I：
10.1016/j.matlet.2013.11.106
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
MnO2 nanowire/Ag nanoparticles composites for supercapacitor were synthesized with a two-step procedure, which involves preparing MnO2 nanowires and acquiring conductive Ag nanoparticles grown on the surface of MnO2 nanowires with reducing Ag+. The results show that Ag nanoparticles are not only to improve the electric conductivity, but also to enhance the structural stability of the composites. The composites have an excellent specific capacitance of 3964 Fig at a scan rate of 50 mV/s in 1 M Na2SO4 aqueous solution, which is almost five times that of the pure MnO2 nanowires. Besides, capacitance retention of 95.2% for the MnO2/Ag over 2000 charge/discharge cycles at a charge/discharge current of 5 A/g is much better than that of the pure MnO2 NWs. (C) 2013 Elsevier B.V. All rights reserved
引用
收藏
页码：104 / 107
页数：4
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