Ordered mesoporous carbon/sulfur nanocomposite of high performances as cathode for lithium-sulfur battery
Date
2011-03-08Author
Chen, Shu-Ru
Zhai, Yun-Pu(Fudan Univ, Dept Chem)
Xu, Gui-Liang
Jiang, Yan-Xia
姜艳霞
Zhao, Dong-Yuan(Fudan Univ, Dept Chem)
Li, Jun-Tao
李君涛
Huang, Ling
黄令
Sun, Shi-Gang
孙世刚
Collections
- 化学化工-已发表论文 [14469]
Abstract
Ordered mesoporous carbon/sulfur (OMC/S) nanocomposites with hierarchically structured sulfur loading, ranging from 50 to 75 wt%, were synthesized via a simple melt-diffusion strategy. The OMC with a BET surface area of 2102 m(2) g(-1), a pore volume of 2.0 cm(3) g(-1) and unique bimodal mesoporous (5.6/2.3 nm) structure, was prepared from a triconstituent co-assembly method. The resulting OMC/S nanocomposite material served as cathode of rechargeable lithium-sulfur (Li-S) battery. It has been tested that the novel OMC/S cathode can deliver a superior reversible capacity and cyclability. In particular, the nanocomposite with a loading of 60 wt% sulfur (OMC/S-60) presents the highest sulfur utilization ca. 70%, an excellent high rate capability ca. 6C and a good cycling stability for up to 400 full charge-discharge cycles. The exceptional electrochemical performances are exclusively attributed to the large internal surface area and high porosity of the ordered mesoporous carbon, which favorites both electron and Li-ion transportations. (C) 2011 Elsevier Ltd. All rights reserved.
Citation
ELECTROCHIMICA ACTA,2011,56(26):9549-9555URI
http://dx.doi.org/doi:10.1016/j.electacta.2011.03.005https://dspace.xmu.edu.cn/handle/2288/11466
WOS:000297493300005