Composite Material of MnO₂ and CNT for Supercapacitor

Abstract:

MnO2 nanoparticle was produced using liquid coprecipitation method, CNT was produced using microwaveplasma chemical vapor deposition(MWPCVD). SEM and EDS were used to examine the morphology and the elements of the samples. The diameter of MnO2 particle is about 300nm. And the CNT sample has a diameter about 10~20nm and a length longer than 5 µm. Two methods, namely annealing and doping CNT, were used to modify the electrochemical characteristics of MnO2 particle. The electrochemical characteristics were tested using galvanostatic charge-discharge cycling. And the results demonstrated that the prepared MnO2 have a good pseudocapacitance behavior and power characteristic. And the specific capacitor (SC) of MnO2 particle was about 145.41F/g, the SC of CNT was 136.30F/g, the one up to 179.89F/g with a dopant of CNT.

• Periodical: Advanced Materials Research (Volume 663)
• Pages: 447-450
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.663.447
• Online since: February 2013
• Authors: De Qun Kang, Ze Xiang Chen, Tian Yong Hu, Jun Ren, Miao Dong
• Keywords: CNT, Composite, MnO₂, Super-Capacitor (SC)

References

[1] Simon P, Gogotsi Y. Materials for Electrochemical Capacitors[J]. Nat Mater, 2008, 7: 845-854.

[2] Frackowiak E. Carbon Materials for Supercapacitor Application[J]. Phys Chem Chem Phys, 2007, 9: 1774-1785.

[3] Zhang L L, Zhao X S . Catbon-based Materials as Supercapacitor Electrodes[J]. Chem Soc Rev, 2009, 38: 2550-2531.

[4] WAN Chuanyun, WANG Lijun, SHEN Shaodian, et al. Effect of Synthesis Routes on the Performances of MnO2 for Electrochemical Capacitors[J]. Acta Chim Sin, 2009, 67(14): 1559-1565.

[5] Marchioni F, Yang J, Walker W, et al. A Low Band Gap Conjugated Polymer for Supercapacitor Devices[J]. J Phys B, 2006, 110: 22202-22206.

DOI: 10.1021/jp063849w

[6] Sivaraman P, Kushwaha R K, Shashidhara K, et al. All Solid Supercapacitor Based on Polyaniline and Crosslinked Sulfonated Poly[J]. Eletrochim Acta, 2010, 55: 2451-2456.

DOI: 10.1016/j.electacta.2009.12.009

[7] Masaharu Nakayama, Taku Kanaya, Ryota Inoue. Anodic Depodition of Layerde Manganese Oxide into a Colloidal Crystal Template for Electrochemical Supercapacitor[J]. Electrochemistry Communication, 2007, (9): 1154-1158.

DOI: 10.1016/j.elecom.2007.01.021

[8] Chung-KweiLin, Kai-Han Chuang, Chia-Yan Lin, et al. Manganese Oxide Films Prepared by Sol-gel Process for Supercapacitor Application[J]. Surface&coatings Technoligy, 2007, (202): 1272-1276.

DOI: 10.1016/j.surfcoat.2007.07.049

[9] ZHANG Zhi-an, YANG Bang-chao, DENG Mei-gen, et al. Amorphous MnO2 as Electrode Material for Supercapacitor[J]. Journal of Functional Materials and Devices, 2005, 11(1): 58-62.

[10] Hee Y Lee, Goodenough J B. Supercapacitor Behavior with KCl Eletrolyte[J]. Journal of Solid State Chemistry, 1999, 144: 220-223.

DOI: 10.1006/jssc.1998.8128

[11] ZHENG Liping, WANG Xianyou, LI Na, et al. Modification of Carbon Nanotubes and Its Application in Supercapacitor[J]. Chemistry, 2009, 8: 720-727(in Chinese).

[12] Zhang H, Gao G, Yang Y. Carbon Nanotube Arrays and Their Composites for Electrochemical Capacitors and Lithium-ion Batteries[J]. Energy Environ Sci, 2009, 2: 932-943.

DOI: 10.1039/b906812k