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Synthesis of Amorphous MnO2/MWCNT Nanocomposites and Their Electrochemical Properties
Corresponding Author(s) : Jie Hu
Asian Journal of Chemistry,
Vol. 26 No. 18 (2014): Vol 26 Issue 18
Abstract
MnO2/MWCNT nanocomposites has been fabricated through a simple route in a water-reflux condenser system under different temperature. The as-prepared composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Brunauer-Emmett-Teller surface area analysis. Capacitive properties of the synthesized composite electrodes were investigated via cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectrometry in a 0.5 M Na2SO4 electrolyte. Results show that this method can control the number and size of MnO2 particles loaded onto the surface of MWCNTs. Because excessive MnO2 enwrapping carbon nanotubes would affect the overall conductivity, the composite prepared by lower temperature has better characteristics of super capacitor. 60-MnO2/MWCNT composite (51 wt. % MnO2) displays the specific capacitance as high as 337 F/g at 1000 mA/g, which is higher than that of 100-MnO2/MWCNT (290 F/g) and exhibited an excellent cycling stability with no more than 6 % capacitance loss after 1000 cycles.
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- F. Teng, S. Santhanagopalan, Y. Wang and D.D. Meng, J. Alloys Comp., 499, 259 (2010); doi:10.1016/j.jallcom.2010.03.181.
- F. Teng, S. Santhanagopalan and D.D. Meng, Solid State Sci., 12, 1677 (2010); doi:10.1016/j.solidstatesciences.2010.07.026.
- V. Subramanian, H. Zhu and B. Wei, Electrochem. Commun., 8, 827 (2006); doi:10.1016/j.elecom.2006.02.027.
- R. Jiang, T. Huang, Y. Tang, J. Liu, L. Xue, J. Zhuang and A. Yu, Electrochim. Acta, 54, 7173 (2009); doi:10.1016/j.electacta.2009.07.041.
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- J.M. Ko and K.M. Kim, Mater. Chem. Phys., 114, 837 (2009); doi:10.1016/j.matchemphys.2008.10.047.
- Z.J. Fan, Z.W. Qie, T. Wei, J. Yan and S. Wang, Mater. Lett., 62, 3345 (2008); doi:10.1016/j.matlet.2008.02.060.
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- X.F. Xie and L. Gao, Carbon, 45, 2365 (2007); doi:10.1016/j.carbon.2007.07.014.
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References
F. Teng, S. Santhanagopalan, Y. Wang and D.D. Meng, J. Alloys Comp., 499, 259 (2010); doi:10.1016/j.jallcom.2010.03.181.
F. Teng, S. Santhanagopalan and D.D. Meng, Solid State Sci., 12, 1677 (2010); doi:10.1016/j.solidstatesciences.2010.07.026.
V. Subramanian, H. Zhu and B. Wei, Electrochem. Commun., 8, 827 (2006); doi:10.1016/j.elecom.2006.02.027.
R. Jiang, T. Huang, Y. Tang, J. Liu, L. Xue, J. Zhuang and A. Yu, Electrochim. Acta, 54, 7173 (2009); doi:10.1016/j.electacta.2009.07.041.
M.O. Danilov and A.V. Melezhyk, J. Power Sources, 163, 376 (2006); doi:10.1016/j.jpowsour.2006.08.009.
J.M. Ko and K.M. Kim, Mater. Chem. Phys., 114, 837 (2009); doi:10.1016/j.matchemphys.2008.10.047.
Z.J. Fan, Z.W. Qie, T. Wei, J. Yan and S. Wang, Mater. Lett., 62, 3345 (2008); doi:10.1016/j.matlet.2008.02.060.
Z. Fan, J.H. Chen, M.Y. Wang, K. Cui, H. Zhou and Y. Kuang, Diamond Rel. Mater., 15, 1478 (2006); doi:10.1016/j.diamond.2005.11.009.
X.F. Xie and L. Gao, Carbon, 45, 2365 (2007); doi:10.1016/j.carbon.2007.07.014.
S.B. Ma, K.W. Nam, W.S. Yoon, X.Q. Yang, K.Y. Ahn, K.H. Oh and K.B. Kim, Electrochem. Commun., 9, 2807 (2007); doi:10.1016/j.elecom.2007.09.015.
S.B. Ma, K.W. Nam, W.S. Yoon, X.Q. Yang, K.Y. Ahn, K.H. Oh and K.B. Kim, J. Power Sources, 178, 483 (2008); doi:10.1016/j.jpowsour.2007.12.027.
J. Yan, Z. Fan, T. Wei, J. Cheng, B. Shao, K. Wang, L. Song and M. Zhang, J. Power Sources, 194, 1202 (2009); doi:10.1016/j.jpowsour.2009.06.006.
M. Wang, C. Wang, G. Wang, W. Zhang and F. Bin, Electroanalysis, 22, 1123 (2010); doi:10.1002/elan.200900521.
H.Y. Chu, Q.Y. Lai, L. Wang, J.F. Lu and Y. Zhao, Ionics, 16, 233 (2010); doi:10.1007/s11581-009-0378-5.
H. Wang, C. Peng, F. Peng, H. Yu and J. Yang, Mater. Sci. Eng. B, 176, 1073 (2011); doi:10.1016/j.mseb.2011.05.043.
Z.J. Fan, M.M. Xie, X. Jin, J. Yan and T. Wei, J. Electroanal. Chem., 659, 191 (2011); doi:10.1016/j.jelechem.2011.05.025.
J.H. Zhang, Y.H. Wang, J.B. Zang, G.X. Xin, Y.G. Yuan and X.H. Qu, Carbon, 50, 5196 (2012); doi:10.1016/j.carbon.2012.07.002.
S.B. Ma, K.Y. Ahn, E.S. Lee, K.H. Oh and K.B. Kim, Carbon, 45, 375 (2007); doi:10.1016/j.carbon.2006.09.006.
H. Zhou, S. Zhu, M. Hibino and I. Honma, J. Power Sources, 122, 219 (2003); doi:10.1016/S0378-7753(03)00439-7.
K.H. An, W.S. Kim, Y.S. Park, Y.C. Choi, S.M. Lee, D.C. Chung, D.J. Bae, S.C. Lim and Y.H. Lee, Adv. Mater., 13, 497 (2001); doi:10.1002/1521-4095(200104)13:7<497::AID-ADMA497>3.0.CO;2-H.