Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1610840 | Journal of Alloys and Compounds | 2014 | 9 Pages |
Abstract
Mesohollow and microporous carbon nanofibers (MhMpCFs) were prepared by a coaxial electrospinning with polyacrylonitrile (PAN) and polymethylmethacrylate (PMMA) as outer and inner spinning solutions followed by a carbonization. The carbon fibers were thermal treated with sublimed sulfur to form S/MhMpCFs composite, which was used as cathode material for lithium-sulfur batteries. Electrochemical study shows that the S/MhMpCFs cathode material provides a maximum capacity of 815Â mAÂ h/g after several cycles of activation, and the capacity retains 715Â mAÂ h/g after 70Â cycles, corresponding to a retention of 88%. The electrochemical property of the S/MhMpCFs composite is much superior than the S-incorporated solid carbon fibers prepared from electrospinning of single PAN. The mechanism of the enhanced electrochemical property of the S/MhMpCFs composite is discussed.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yuanhe Wu, Mingxia Gao, Xiang Li, Yongfeng Liu, Hongge Pan,