Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 37, Pages 18829-18834Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta05053g
Keywords
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-SC0005397]
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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.
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