Liquid crystalline phase synthesis of nanoporous MnO2 thin film arrays as an electrode material for electrochemical capacitors

被引：7
|
作者：
Yang, Guangwu [1 ,2 ]
Wang, Baoli [3 ]
Guo, Wenyue [1 ,2 ]
Bu, Zhongheng [1 ]
Miao, Chengcheng [1 ]
Xue, Tong [4 ]
Li, Hulin [4 ]
机构：
[1] China Univ Petr, Coll Sci, Qingdao 266555, Shandong, Peoples R China
[2] China Univ Petr, Key Lab New Energy Phys & Mat Sci Univ Shandong, Qingdao 266555, Shandong, Peoples R China
[3] China Univ Petr, Sch Geosci, Qingdao 266555, Shandong, Peoples R China
[4] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2012年 / 47卷 / 11期
关键词：
Microporous materials; Oxides; Thin films; Electrochemical measurements; Energy storage; MANGANESE-DIOXIDE; OXIDE; SUPERCAPACITORS; STORAGE; DEPOSITION; BEHAVIOR;
D O I：
10.1016/j.materresbull.2012.08.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Three-dimensional (3D) MnO2 thin film arrays with nanoporous structure is electrodeposited on Ti foil from hexagonal lyotropic liquid crystalline phase. Low-angle X-ray diffraction (XRD), wide-angle XRD, field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) are employed to study the morphology and the structure of the as-synthesized MnO2 materials. Galvanostatic charge/discharge measurements show the nanoporous, 3D electrode material exhibits excellent capacitive performance between the potential range of -0.1 to 0.9 V. and a maximum specific capacitance as high as 462 F g(-1) are achieved in 0.5 M Na2SO4 solution at a charge/discharge current density of 4 A g(-1). Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：3120 / 3123
页数：4
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