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Chin J Mater Res  2009, Vol. 23 Issue (6): 628-634    DOI:
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Effect of impurity ions on electrochemical super-capacitive properties of amorphous hydrated ruthenium oxide
WU Caixia1; LIU Gang2; FANG Haitao2; LI Feng3; SHI Pengfei1
1.School of Chemical Engineering and Technology; Harbin Institute of Technology; Harbin 150001
2.School of Materials Science and Engineering; Harbin Institute of Technology; Harbin 150001
3.Shenyang National Laboratory for Materials Science; Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110016
Cite this article: 

WU Caixia LIU Gang FANG Haitao LI Feng SHI Pengfei. Effect of impurity ions on electrochemical super-capacitive properties of amorphous hydrated ruthenium oxide. Chin J Mater Res, 2009, 23(6): 628-634.

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Abstract  

Amorphous hydrous ruthenium oxide was prepared by a chemical precipitation method. Two ruthenium oxide samples with different contents of Na and Cl impurities were obtained by changing the number of times for washing sediments with distilled water. The experiment results showed that the Na and Cl impurities exist as hydrated Na+ and hydrated Cl−, respectively. Sample W 5 (sufficiently
washed 5 times with distilled water during its preparation) has lower content of Na+ and Cl+ impurities in comparison with sample W 1 (insufficiently washed once with distilled water during its preparation). Cyclic voltammetric measurements indicate that the specific capacitance and power performance of W 5 are all higher than that of W 1. Hydrated Na+ and Cl− impurities not only decrease the specific capacitance of ruthenium oxide, but degrade the power performance. The reason for the deleterious effect of hydrated Na+ and Cl− impurities on the super-capacitive properties is discussed.
Key words:  inorganic non-metallic materials        material physics and chemistry       supercapacitor       X–ray photoelectron spectra       ruthenium oxide     
Received:  27 May 2009     
ZTFLH: 

O614

  
Fund: 

Supported by National Natural Science Foundation of China Nos.50872026 and 50602011.
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WU Cai-Xia
LIU Gang
FANG Hai-Shou
TANG Xiao-Xia
REN Xiao-Hui
LI Feng
SHI Peng-Fei

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https://www.cjmr.org/EN/     OR     https://www.cjmr.org/EN/Y2009/V23/I6/628

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