title: Free-standing porous carbon nanofibers-sulfur composite for flexible Li-S battery cathode.
abstract: Flexible and free-standing sulphur/(PCNFs-CNT) composite (S@PCNFs-CNT) electrode was successfully prepared by infiltrating sulfur into microporous carbon nanofibers-carbon nanotube (PCNFs-CNT) composite. When used as a cathode material for Li-S batteries, the S@PCNFs-CNT exhibits much better cycle performance and rate performance compared to CNT-free S@PCNFs. It delivers a reversible capacity of 637 mA h g(-1) after 100 cycles at 50 mA g(-1) and a rate capability of 437 mA h g(-1) at 1 A g(-1). The improved electrochemical performance is attributed to synergistic effect of the 3D interconnected structure, the additive of CNT, and the uniform distribution of micropores (<2 nm) in the PCNFs-CNT matrix. Our results indicate the potential suitability of PCNFs-CNT for efficient, free-standing, and high-performance batteries.
authors.affiliation: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Anhui Hefei 230026, China. yanyumse@ustc.edu.cn.
authors.forename: Linchao
authors.initials: L
authors.lastname: Zeng
authors.forename: Fusen
authors.initials: F
authors.lastname: Pan
authors.forename: Weihan
authors.initials: W
authors.lastname: Li
authors.forename: Yu
authors.initials: Y
authors.lastname: Jiang
authors.forename: Xiongwu
authors.initials: X
authors.lastname: Zhong
authors.forename: Yan
authors.initials: Y
authors.lastname: Yu