Physicochemical factors that affect the pseudocapacitance and cyclic stability of Mn oxide electrodes

被引:49
作者
Chang, Jeng-Kuei [1 ]
Huang, Chiung-Hui [1 ]
Lee, Ming-Tsung [1 ]
Tsai, Wen-Ta [1 ]
Deng, Ming-Jay [2 ]
Sun, I-Wen [2 ]
机构
[1] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 70101, Taiwan
[2] Natl Cheng Kung Univ, Dept Chem, Tainan 70101, Taiwan
关键词
Mn oxide; Supercapacitor; Pseudocapacitance; Cyclic stability; Ionic liquid; MANGANESE OXIDE; THIN-FILM; ELECTROCHEMICAL CAPACITORS; HYDROTHERMAL SYNTHESIS; IONIC LIQUID; BEHAVIOR; PERFORMANCE;
D O I
10.1016/j.electacta.2008.12.042
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Manganese (Mn) oxide was prepared by anodizing metallic Mn film that was electrodeposited in n-butylmethylpyrrolidinium bis(trifluoromethylsulfony)imide (BMP-NTf2) ionic liquid. Different anodization courses, namely potentiostatic and cyclic voltammetric methods, led to variations in physical and chemical characteristics of the Mn oxides, and therefore in their pseudocapacitive performance. Evolution of the microstructure, residual weight, and chemical state of the Mn oxides with the charge-discharge cycling number was studied using a scanning electron microscope (SEM), an atomic absorption spectroscope, and an X-ray photoelectron spectroscope, respectively. The analytical results indicate that the electrochemical stability of Mn oxide is mainly determined by its microstructure; the more fibrous (or porous) oxide had a greater durability against cyclic charge-discharge. Moreover, the chemically hydrous state was found to be the most crucial factor that governed the mass specific capacitance of Mn oxide. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3278 / 3284
页数:7
相关论文
共 35 条
[1]   Electrochemical capacitance in manganese thin films with chevron microstructure [J].
Broughton, JN ;
Brett, MJ .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2002, 5 (12) :A279-A282
[2]   Manganese films electrodeposited at different potentials and temperatures in ionic liquid and their application as electrode materials for supercapacitors [J].
Chang, Jeng-Kuei ;
Huang, Chiung-Hui ;
Tsai, Wen-Ta ;
Deng, Ming-Jay ;
Sun, I-Wen ;
Chen, Po-Yu .
ELECTROCHIMICA ACTA, 2008, 53 (13) :4447-4453
[3]   Ideal pseudocapacitive performance of the Mn oxide anodized from the nanostructured and amorphous Mn thin film electrodeposited in BMP-NTf2 ionic liquid [J].
Chang, Jeng-Kuei ;
Huang, Chiung-Hui ;
Tsai, Wen-Ta ;
Deng, Ming-Jay ;
Sun, I. -Wen .
JOURNAL OF POWER SOURCES, 2008, 179 (01) :435-440
[4]   In situ MnK-edge X-ray absorption spectroscopic studies of anodically deposited manganese oxide with relevance to supercapacitor applications [J].
Chang, Jeng-Kuei ;
Lee, Ming-Tsung ;
Tsai, Wen-Ta .
JOURNAL OF POWER SOURCES, 2007, 166 (02) :590-594
[5]   Preparation of manganese thin film in room-temperature butylmethylpyrrolidinium bis(trifluoromethylsulfony)imide ionic liquid and its application for supercapacitors [J].
Chang, Jeng-Kuei ;
Tsai, Wen-Ta ;
Chen, Po-Yu ;
Huang, Chiung-Hui ;
Yeh, Fu-Hwa ;
Sun, I-Wen .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2007, 10 (01) :A9-A12
[6]   Effect of heat treatment on material characteristics and pseudo-capacitive properties of manganese oxide prepared by anodic deposition [J].
Chang, JK ;
Chen, YL ;
Tsai, WT .
JOURNAL OF POWER SOURCES, 2004, 135 (1-2) :344-353
[7]   Manganese oxide/carbon composite electrodes for electrochemical capacitors [J].
Chang, JK ;
Lin, CT ;
Tsai, WT .
ELECTROCHEMISTRY COMMUNICATIONS, 2004, 6 (07) :666-671
[8]   Material characterization and electrochemical performance of hydrous manganese oxide electrodes for use in electrochemical pseudocapacitors [J].
Chang, JK ;
Tsai, WT .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (10) :A1333-A1338
[9]   Preparation of manganese oxide thin films by electrolysis/chemical deposition and electrochromism [J].
Chigane, M ;
Ishikawa, M ;
Izaki, M .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2001, 148 (07) :D96-D101
[10]   Manganese oxide thin film preparation by potentiostatic electrolyses and electrochromism [J].
Chigane, M ;
Ishikawa, M .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (06) :2246-2251