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Title: A core–shell cathode substrate for developing high-loading, high-performance lithium–sulfur batteries

Abstract

Lithium–sulfur batteries with a high theoretical energy density would be a promising next-generation energy-storage system if their cell-fabrication parameters (e.g., sulfur loading/content and the electrolyte/sulfur ratio) are improved to a practically necessary level. In this article, we report the design of a three-dimensional core–shell carbon substrate, integrating a porous internal core with a conductive external carbon nanofiber shell. Such a carbon substrate encapsulates a high amount of sulfur as the active material core to form a high-loading core–shell cathode, attaining an ultra-high sulfur loading and content of, respectively, 23 mg cm-2 and 75 wt%. With distinguishable internal and external regions, the carbon substrate facilitates the redox reactions and hinders the polysulfide diffusion. Therefore, the core–shell cathodes exhibit a high areal capacity and energy density of, respectively, 14 mA h cm-2 and 27 mW h cm-2 during cycling. During resting, they achieve a long shelf-life of one month with a low capacity-fade rate of 0.25% per day.

Authors:
 [1];  [2]; ORCiD logo [3]; ORCiD logo [2]
  1. Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program & Texas Materials Institute; Univ. of Science and Technology of China, Hefei (China)
  2. Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program & Texas Materials Institute
  3. Univ. of Science and Technology of China, Hefei (China)
Publication Date:
Research Org.:
Univ. of Texas, Austin, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; China Scholarship Council
OSTI Identifier:
1598248
Alternate Identifier(s):
OSTI ID: 1483703
Grant/Contract Number:  
SC0005397; 201706340107
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Chemistry. A
Additional Journal Information:
Journal Volume: 6; Journal Issue: 48; Journal ID: ISSN 2050-7488
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE

Citation Formats

Yu, Ran, Chung, Sheng-Heng, Chen, Chun-Hua, and Manthiram, Arumugam. A core–shell cathode substrate for developing high-loading, high-performance lithium–sulfur batteries. United States: N. p., 2018. Web. doi:10.1039/C8TA09059A.
Yu, Ran, Chung, Sheng-Heng, Chen, Chun-Hua, & Manthiram, Arumugam. A core–shell cathode substrate for developing high-loading, high-performance lithium–sulfur batteries. United States. doi:10.1039/C8TA09059A.
Yu, Ran, Chung, Sheng-Heng, Chen, Chun-Hua, and Manthiram, Arumugam. Wed . "A core–shell cathode substrate for developing high-loading, high-performance lithium–sulfur batteries". United States. doi:10.1039/C8TA09059A. https://www.osti.gov/servlets/purl/1598248.
@article{osti_1598248,
title = {A core–shell cathode substrate for developing high-loading, high-performance lithium–sulfur batteries},
author = {Yu, Ran and Chung, Sheng-Heng and Chen, Chun-Hua and Manthiram, Arumugam},
abstractNote = {Lithium–sulfur batteries with a high theoretical energy density would be a promising next-generation energy-storage system if their cell-fabrication parameters (e.g., sulfur loading/content and the electrolyte/sulfur ratio) are improved to a practically necessary level. In this article, we report the design of a three-dimensional core–shell carbon substrate, integrating a porous internal core with a conductive external carbon nanofiber shell. Such a carbon substrate encapsulates a high amount of sulfur as the active material core to form a high-loading core–shell cathode, attaining an ultra-high sulfur loading and content of, respectively, 23 mg cm-2 and 75 wt%. With distinguishable internal and external regions, the carbon substrate facilitates the redox reactions and hinders the polysulfide diffusion. Therefore, the core–shell cathodes exhibit a high areal capacity and energy density of, respectively, 14 mA h cm-2 and 27 mW h cm-2 during cycling. During resting, they achieve a long shelf-life of one month with a low capacity-fade rate of 0.25% per day.},
doi = {10.1039/C8TA09059A},
journal = {Journal of Materials Chemistry. A},
number = 48,
volume = 6,
place = {United States},
year = {2018},
month = {11}
}

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    Works referencing / citing this record:

    ZnS coating of cathode facilitates lean‐electrolyte Li‐S batteries
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