Issue 26, 2014

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

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 m2 g−1 and a total pore volume of 1.12 cm3 g−1. As a cathode, this material with 55 wt.% sulfur shows a high capacity of ∼1313 mA h g−1 at 0.2 C, 1078 mA h g−1 at 0.5 C, 878 mA h g−1 at 1 C, 803 mA h g−1 at 1.5 C, 739 mA h g−1 at 2 C, and 572 mA h g−1 at 5 C, and maintains ∼700 mA h g−1 at 1 C after 100 cycles and 430 mA h g−1 at 5 C after 200 cycles, which makes it a superior cathode material for a rechargeable Li–S battery.

Graphical abstract: Sulfur encapsulated in porous hollow CNTs@CNFs for high-performance lithium–sulfur batteries

Supplementary files

Article information

Article type
Paper
Submitted
14 4 2014
Accepted
06 5 2014
First published
12 5 2014

J. Mater. Chem. A, 2014,2, 10126-10130

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

Y. Chen, X. Li, K. Park, J. Hong, J. Song, L. Zhou, Y. Mai, H. Huang and J. B. Goodenough, J. Mater. Chem. A, 2014, 2, 10126 DOI: 10.1039/C4TA01823K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements