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Title: Built‐in Carbon Nanotube Network inside a Biomass‐Derived Hierarchically Porous Carbon to Enhance the Performance of the Sulfur Cathode in a Li‐S Battery

Journal Article · · ChemNanoMat
 [1];  [2];  [3];  [3];  [1]; ORCiD logo [4]
  1. School of Chemistry and Chemical Engineering Hefei University of Technology Hefei 230009 P.R. China
  2. School of Chemistry and Chemical Engineering Hefei University of Technology Hefei 230009 P.R. China, Texas Materials Institute and Materials Science and Engineering Program The University of Texas at Austin Austin TX 78712 USA
  3. Texas Materials Institute and Materials Science and Engineering Program The University of Texas at Austin Austin TX 78712 USA
  4. Division of Nanomaterials &, Chemistry Hefei National Laboratory for Physical Sciences at Microscale Department of Chemistry University of Science and Technology of China Hefei 230026 P.R. China

Abstract The practical application of lithium‐sulfur batteries is usually hindered by the unstable discharge intermediates and the low conductivity of the sulfur cathode. Herein, we propose to improve the performance of the sulfur cathode by introducing a built‐in carbon nanotube network inside a biomass‐derived hierarchically porous carbon for the subsequent sulfur loading. This balanced structural design of the carbon substrate enables effective trapping of active sulfur within the cathode and provides a highly efficient pathway for electron transmission, contributing to an increased conductivity and structural integrity of the cathode. By using a potentiostatic process at the end of charge, the reversibility of the electrode reaction of sulfur is improved. The sulfur cathode delivers an initial discharge capacity of 1739 mA h g −1 and reaches a high initial Columbic efficiency of 87.6 %, and maintains its efficiency to >97.5 % from the 2nd cycle. It also shows admirable cycling and rate performance.

Sponsoring Organization:
USDOE
OSTI ID:
1400959
Journal Information:
ChemNanoMat, Journal Name: ChemNanoMat Vol. 2 Journal Issue: 7; ISSN 2199-692X
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 49 works
Citation information provided by
Web of Science

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