自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 11    No. 3    September 2004

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Influence of polyethylene glycol on pore structure and electric
double-layer capacitance of carbon xerogel
HOU Zhao-hui(侯朝辉)1,2, LI Xin-hai(李新海)1, HE Ze-qiang(何则强) 1,
LIU En-hui(刘恩辉) 1, DENG Ling-feng(邓凌峰) 1

1.School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2.Department of Chemistry and Chemical Engineering,
Hunan Institute of Science and Technology, Yueyang 414006, China

Abstract:Mesoporous polyethylene glycol-resorcinol and formaldehyde(PEG-RF) carbon xerogels were prepared by a new polymer blend method in which PEG-RF mixed organic xerogels were synthesized by blending thermally unstable polyethylene glycol with organic monomers, resorcinol and formaldehyde and then subjected to pyrolization at 1 000℃.The influences of mass ratio of PEG to the theoretical yield of RF xerogel,m(PEG)/m(RF) and the relative molecular
mass of PEG on the pore structure and electric double layer capacitance(EDLC) performance of PEG-RF carbon xerogels were investigated. The results show that PEG under different conditions leads to the difference of phase separation structure of the polymer blend and thus the change of pore structure of PEG-RF carbon xerogels. Specific surface area and capacity of PEG-RF carbon xerogels in 30% H2SO4solution can reach 755 m2/g and 150 F/g, respectively. Their surface
can be fully utilized to form electric double layer. However, the pore structure differences of PEG-RF carbon xerogels result in their different EDLC performances. The distributed capacitance effect increases with decreasing the pore size of PEG-RF carbon xerogels.

 

Key words: polymer blend method; polyethylene glycol; carbon xerogel; electric double-layer capacitance

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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