An Investigation on Electrochemical Performance of Supercapacitor Electrode Materials Prepared by MnO₂ with four Different Crystal Forms

Authors

Zhen-Kun WEI
Xiao-Zhen HUA
Ke XIAO
Xian-Liang ZHOU
Zhi-Guo YE

Corresponding Author

Zhen-Kun WEI

Abstract

Four types of α-MnO₂, β-MnO₂, γ-MnO₂ and δ-MnO₂ powders were synthesized by relatively simple methods. The differences in crystal structures and surface morphologies for these forms of MnO₂ were investigated by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA) and specific surface area analysis (BET). The electrochemical performances were characterized by cyclic voltammetry (CV) and stability analysis. Based on the experimental results, four kinds of MnO₂ electrodes showed good capacity properties, and the α-MnO₂ electrode had the largest specific capacity due to the highest specific surface area and porosity. The remaining three types of MnO₂ electrodes had similar specific surface areas, and the β-MnO₂ electrode had better rate discharge property and stability due to its lower developed pore structure.

Graphical Abstract

Keywords

supercapacitor, manganese dioxide, crystal structure, cyclic voltammetry analysis

DOI Link

https://doi.org/10.13208/j.electrochem.150408

Publication Date

2015-08-28

Online Available Date

2015-08-28

Revised Date

2015-05-07

Received Date

2015-04-08

Recommended Citation

Zhen-Kun WEI, Xiao-Zhen HUA, Ke XIAO, Xian-Liang ZHOU, Zhi-Guo YE. An Investigation on Electrochemical Performance of Supercapacitor Electrode Materials Prepared by MnO₂ with four Different Crystal Forms[J]. Journal of Electrochemistry, 2015 , 21(4): 150408.
DOI: 10.13208/j.electrochem.150408
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss4/15

References

[1] Yury G, Bruce D, Begin P S. Where do batteries end and supercapacitors[J]. Science, 2014, 343(14): 1210-1211.
[2] Lee H Y, Goodenough J B. Supercapacitor behavior with KCl electrolyte[J]. Journal of Solid State Chemistry, 1999, 144(1): 220-223.
[3] Xia X(夏熙). Nano manganese dioxide and supercapacitor[J]. Chinese Battery Industry(电池工业), 2011, 16(1): 41-48.
[4] Huang T L(黄廷立), Ye Z G(叶志国), Peng X Y(彭新元), et al. electrochemical properties of supercapacitor electrode materials perpared by MnO2 with different crystal forms[J]. Materials for Mechanical Engineering(机械工程材料), 2012, 36(4): 67-70.
[5] Wei C G(魏春光). An Investigation on tunnel controlling and electrochemical cation storage performance of manganese dioxide[D]. Beijing: Tsinghua University, 2013.
[6] Wei W F, Cui X W, Chen W X, et al. Manganese oxide-based materials as electrochemical supercapacitor electrodes[J]. Chemical Society Reviews, 2011, 40(3): 1697-1721.
[7] Li J F, Xi B J, Zhu Y C, et al. A precursor route to synthesize mesoporous - MnO2 microcrystals and their applications in lithium battery and water treatment[J]. Journal of Alloys and Compounds, 2011, 509(39): 9542-9548.
[8] Xia X(夏熙). Crystal structure, preparation and discharge performance for manganese dioxides and related manganese oxides (1)[J]. Battery Bimonthly(电池), 2004, 34(6): 411-414.
[9] Hu Z M, Xu X, Chen C, et al. Al-doped α-MnO2 for high mass-loading pseudocapacitor with excellent cycling stability[J]. Nano Energy, 2015, 11: 226-134.
[10] Xiao K(肖可). Study on preperation and performance optimization of MnO2 aqueous supercapacitors[D]. NanChang: Nanchang Hangkong University, 2014.
[11] Zhai D Y(翟登云). A study on the electrode materials of supercapacitors with high energy density[D]. Beijing: Tsinghua University, 2011.