Abstract
Polyaniline/multi-walled carbon nanotubes (PANI/MWCNT) composites synthesized by chemical oxidation method were characterized by scanning electron microscopy (SEM),X-ray diffraction (XRD) and IR techniques. In 1mol/L Li2SO4 neutral solution,the electrochemical performance of the composites electrode was investigated by cyclic voltammetry,galvanostatic charge-discharge tests and ac impedance spectroscopy. The results showed that the composites electrode performed well in 1mol/L Li2SO4 solution,the specific capacitance reached 412F/g at 5 mA/cm2. The composites electrode possessed better capability of high current than that of PANI electrode,the specific capacitance kept at 318 F/g at 50mA/cm2 and was 77.2% of that at 5 mA/cm2,but the specific capacitance of PANI at 50 mA/cm2 was only 56.2% of that at 5 mA/cm2. The addition of multi-walled carbon nanotubes could decrease the resistance of composites electrode,leading to remarkably improve the capability of high current discharge.
Keywords
electrochemical capacitor, polyaniline/multi-walled carbon nanotubes composites, capacitance performance
Publication Date
2009-08-28
Online Available Date
2009-08-28
Revised Date
2009-08-28
Received Date
2009-08-28
Recommended Citation
Wen-bo CONG, Xiao-shu HE.
Capacitor Property of PANI/MWCNT Electrode in Li_2SO_4 Solution[J]. Journal of Electrochemistry,
2009
,
15(3): 288-292.
DOI: 10.61558/2993-074X.1997
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol15/iss3/11
References
[1]Ma Renzhi(马仁志),Wei Binqing(魏秉庆),Xu Cai-lu(徐才录),et al.Supercapacitor based on carbon nanotubes[J].Science in China(Series E),2000,30(2):112-116.
[2]Sivakkumar S R,Wan Ju Kim.Electrochemical perform-ance of polyaniline nanofibers and polyaniline/multi-walled carbon nanotube composites as an electrode mate-rial for aqueous redox supercapacitors[J].Journal of Power Sources,2007,(171):1062-1068.
[3]Vinay Gupta,Norio Miura.Influence of the microstruc-ture on the supercapacitive behavior of polyaniline/sin-gle-wall carbon nanotube composites[J].Electrochemi-cal Acta,2006,(157):616-620.
[4]Dong Bin,He Ben-Lin.Preparation and electrochemical characterization of polyaniline/multi-walled carbon nanotubes composites for supercapacitor[J].Materials Science and Engineering,2007,(142):172-176.
[5]Hu Chi-Chang,Lin Jeng-Yan.Effects of the loading and polymerization temperature on capacitive performance of polyaniline in NaNO3[J].Electrochemical Acta,2002,(47):4055-4067.
[6]Zhou Zhanghua,Cai Naicai.Capacitive of characteris-tics of manganese oxides and polyaniline composite thin film deposited on porous carbon[J].Electrochemical Acta,2005,(94):371-375.
[7]Zhang Xiong,Ji Liyan.Synthesis of a novel polyaniline-intercalated layered manganese oxide nanocomposite as electrode material for electrochemical capacitor[J].Journal of Power Sources,2007,(173):1017-1023.
[8]Yang Hongsheng(杨红生),Zhou Xiao(周啸),Zhang Qingwu(张庆武).Studies on preparation and proper-ties of polyaniline/fractionized carbon nanotube compos-ites[J].Acta Polymerica Sinica,2004,(5):266-269.
[9]Park J H,Park O O.Hybrid electrochemical capacitors based on polyaniline and activated carbon electrodes[J].Journal of Power Sources,2002(111):185-190.
[10]Cao Chunan(曹楚南),Zhang Jianqing(张鉴清).An introduction to electrochemical impedance spectroscopy[M].Beijing:Science Press,2002.
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