Functionalized n-doped porous carbon nanofiber webs for a lithium-sulfur battery with high capacity and rate performance

Juan Yang, Jing Xie, Xiangyang Zhou, Youlan Zou, Jingjing Tang, Songcan Wang, Feng Chen, Luyu Wang

科研成果: 期刊稿件文章同行评审

185 引用 (Scopus)

摘要

Functionalized N-doped porous carbon nanofiber webs/sulfur (N-PCNF/S) composites are first proposed as the cathode materials for an advanced lithium-sulfur battery. The functionalized N-doped porous carbon nanofiber webs (N-PCNF) with an appropriate N doping (4.32 wt %) are synthesized by a facile approach, which consists of pyrolyzation of polypyrrole nanofiber and a subsequent KOH activation. Instrumental analysis shows that N-PCNF possesses a large specific surface area (2642 m2 g-1) and a high inner pore volume (1.31 cm3 g-1). When evaluating its electrochemical properties in a lithium-sulfur battery, the N-PCNF/S composite with 77.01 wt % sulfur content displays an excellent electrochemical performance. The specific discharge capacity still reaches 749.8 mAh g -1 after 180 cycles at 0.2 C. At a higher rate of 1 C, the capacity stabilizes at 666.0 mAh g-1 after 200 cycles. This work demonstrates that combining the favorable aspects of N doping modification and one-dimensional nanostructure in the carbon matrix design is an effective way to improve the electrochemical performance of the carbon/sulfur cathodes.

源语言英语
页(从-至)1800-1807
页数8
期刊Journal of Physical Chemistry C
118
4
DOI
出版状态已出版 - 30 1月 2014
已对外发布

指纹

探究 'Functionalized n-doped porous carbon nanofiber webs for a lithium-sulfur battery with high capacity and rate performance' 的科研主题。它们共同构成独一无二的指纹。

引用此