Reversible phase transformation of MnO2 nanosheets in an electrochemical capacitor investigated by in situ Raman spectroscopy

被引：213

作者：

Hsu, Yu-Kuei ^{[2
,3
]}

Chen, Ying-Chu ^{[1
]}

Lin, Yan-Gu ^{[4
]}

Chen, Li-Chyong ^{[1
]}

Chen, Kuei-Hsien ^{[1
,2
]}

机构：

[1] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 106, Taiwan

[2] Acad Sinica, Inst Atom & Mol Sci, Taipei 106, Taiwan

[3] Natl Dong Hwa Univ, Dept Optoelect Engn, Hualien 97401, Taiwan

[4] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 30010, Taiwan

来源：

CHEMICAL COMMUNICATIONS | 2011年 / 47卷 / 04期

关键词：

MANGANESE OXIDE; ELECTRODE; MECHANISM;

D O I：

10.1039/c0cc03902k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The reversible phase transformation is reported from hexagonal to monoclinic structure responding to the intercalation/deintercalation of Na+ between MnO2 nanosheets upon potential cycling in aqueous electrolyte via an in situ Raman technique. This structural evolution will influence the Na+ diffusion process in MnO2 nanosheets and cause phase retention during the self-discharge process.

引用

收藏

页码：1252 / 1254

页数：3

相关论文

共 18 条

[1] Variation of the MnO2 birnessite structure upon charge/discharge in an electrochemical supercapacitor electrode in aqueous Na2SO4 electrolyte [J].

Athouel, Laurence ;

Moser, Francois ;

Dugas, Romain ;

Crosnier, Olivier ;

Belanger, Daniel ;

Brousse, Thierry .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (18) :7270-7277

[2] Enhanced capacitance of manganese oxide via confinement inside carbon nanotubes [J].

Chen, Wei ;

Fan, Zhongli ;

Gu, Lin ;

Bao, Xinhe ;

Wang, Chunlei .

CHEMICAL COMMUNICATIONS, 2010, 46 (22) :3905-3907

[3] A study on mechanism of charging/discharging at amorphous manganese oxide electrode in 0.1 M Na2SO4 solution [J].

Chun, Sang-Eun ;

Pyun, Su-Il ;

Lee, Gyoung-Ja .

ELECTROCHIMICA ACTA, 2006, 51 (28) :6479-6486

[4] Arrayed CNxNT-RuO2 nanocomposites directly grown on Ti-buffered Si substrate for supercapacitor applications [J].

Fang, Wei-Chuan ;

Chyan, Oliver ;

Sun, Chia-Liang ;

Wu, Chien-Ting ;

Chen, Chin-Pei ;

Chen, Kuel-Hsien ;

Chen, Li-Chyong ;

Huang, Jin-Hua .

ELECTROCHEMISTRY COMMUNICATIONS, 2007, 9 (02) :239-244

[5] Microstructural Effects on Charge-Storage Properties in MnO2-Based Electrochemical Supercapacitors [J].

Ghodbane, Ouassim ;

Pascal, Jean-Louis ;

Favier, Frederic .

ACS APPLIED MATERIALS & INTERFACES, 2009, 1 (05) :1130-1139

[6] Flexible supercapacitor based on polyaniline nanowires/carbon cloth with both high gravimetric and area-normalized capacitance [J].

Horng, Ying-Ying ;

Lu, Yi-Chen ;

Hsu, Yu-Kuei ;

Chen, Chia-Chun ;

Chen, Li-Chyong ;

Chen, Kuei-Hsien .

JOURNAL OF POWER SOURCES, 2010, 195 (13) :4418-4422

[7]

Hsu Y.-T., unpublished

[8] Raman spectra of birnessite manganese dioxides [J].

Julien, C ;

Massot, M ;

Baddour-Hadjean, R ;

Franger, S ;

Bach, S ;

Pereira-Ramos, JP .

SOLID STATE IONICS, 2003, 159 (3-4) :345-356

[9] Investigation of pseudocapacitive charge-storage reaction of MnO2.nH2O supercapacitors in aqueous electrolytes [J].

Kuo, Shin-Liang ;

Wu, Nae-Lih .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2006, 153 (07) :A1317-A1324

[10] Mesoporous MnO2/Carbon Aerogel Composites as Promising Electrode Materials for High-Performance Supercapacitors [J].

Li, Gao-Ren ;

Feng, Zhan-Ping ;

Ou, Yan-Nan ;

Wu, Dingcai ;

Fu, Ruowen ;

Tong, Ye-Xiang .

LANGMUIR, 2010, 26 (04) :2209-2213