Sulfur encapsulated in porous hollow CNTs@CNFs for high-performance lithium-sulfur batteries

Yuming Chen, Xiaoyan Li, Kyu Sung Park, Jianhe Hong, Jie Song, Li Min Zhou, Yiu Wing Mai, Haitao Huang, John B. Goodenough

Research output: Journal article publicationJournal articleAcademic researchpeer-review

73 Citations (Scopus)

Abstract

Significant challenges for the commercialization of a lithium-sulfur battery include its rapid capacity fading and low power capability. Encapsulating the sulfur in pores of small volume of a porous carbon material alleviates this problem. We report a carbon-sulfur nanoarchitecture that encapsulates sulfur in porous hollow carbon-nanotubes@carbon-nanofibers (CNTs@CNFs) with a high Brunauer-Emmett-Teller (BET) specific surface area of 1400 m2g-1and a total pore volume of 1.12 cm3g-1. As a cathode, this material with 55 wt.% sulfur shows a high capacity of ∼1313 mA h g-1at 0.2 C, 1078 mA h g-1at 0.5 C, 878 mA h g-1at 1 C, 803 mA h g-1at 1.5 C, 739 mA h g-1at 2 C, and 572 mA h g-1at 5 C, and maintains ∼700 mA h g-1at 1 C after 100 cycles and 430 mA h g-1at 5 C after 200 cycles, which makes it a superior cathode material for a rechargeable Li-S battery. 2014 This journal is
Original languageEnglish
Pages (from-to)10126-10130
Number of pages5
JournalJournal of Materials Chemistry A
Volume2
Issue number26
DOIs
Publication statusPublished - 14 Jul 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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