Issue 37, 2015

Ultra-lightweight PANiNF/MWCNT-functionalized separators with synergistic suppression of polysulfide migration for Li–S batteries with pure sulfur cathodes

Abstract

A custom separator with an ultra-lightweight polyaniline nanofiber/multiwall carbon nanotube (PANiNF/MWCNT) coating has been utilized in lithium–sulfur (Li–S) batteries for investigating the electrochemical performance of the hybrid conductive-polymer/carbon coating. The cells employing the PANiNF/MWCNT-functionalized separators facilitate high reversible capacities of 709, 641, and 612 mA h g−1 at, respectively, C/5, C/2, and 1C rates after 100 cycles. High charge-storage capacity retention was also found in the cell with the PANiNF/MWCNT-functionalized separator after a resting time of 12 h. Such dynamic and static electrochemical stability could be ascribed to the synergistic physical adsorption and chemical immobilization of the polysulfides by the ultra-lightweight PANiNF/MWCNT coating (only 0.01 mg cm−2). This demonstrates that the design of hybrid polymer/carbon-coated-separators has the potential to become a viable approach for successfully developing practical Li–S batteries.

Graphical abstract: Ultra-lightweight PANiNF/MWCNT-functionalized separators with synergistic suppression of polysulfide migration for Li–S batteries with pure sulfur cathodes

Supplementary files

Article information

Article type
Communication
Submitted
06 Jul 2015
Accepted
10 Aug 2015
First published
10 Aug 2015

J. Mater. Chem. A, 2015,3, 18829-18834

Ultra-lightweight PANiNF/MWCNT-functionalized separators with synergistic suppression of polysulfide migration for Li–S batteries with pure sulfur cathodes

C. Chang, S. Chung and A. Manthiram, J. Mater. Chem. A, 2015, 3, 18829 DOI: 10.1039/C5TA05053G

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