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 language | English |
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Pages (from-to) | 10126-10130 |
Number of pages | 5 |
Journal | Journal of Materials Chemistry A |
Volume | 2 |
Issue number | 26 |
DOIs | |
Publication status | Published - 14 Jul 2014 |
ASJC Scopus subject areas
- General Chemistry
- Renewable Energy, Sustainability and the Environment
- General Materials Science