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

Journal Article · · Journal of Materials Chemistry. A
DOI: https://doi.org/10.1039/C8TA09059A · OSTI ID:1598248
 [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); University of Texas at Austin
  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)
+ Show Author Affiliations

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.

Research Organization:
Univ. of Texas, Austin, TX (United States)
Sponsoring Organization:
China Scholarship Council; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
SC0005397
OSTI ID:
1598248
Journal Information:
Journal of Materials Chemistry. A, Journal Name: Journal of Materials Chemistry. A Journal Issue: 48 Vol. 6; ISSN JMCAET; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

References (27)

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Phase Inversion: A Universal Method to Create High-Performance Porous Electrodes for Nanoparticle-Based Energy Storage Devices journal October 2016
Functional Carbons Remedy the Shuttling of Polysulfides in Lithium-Sulfur Batteries: Confining, Trapping, Blocking, and Breaking up journal March 2018
Progress on the Critical Parameters for Lithium-Sulfur Batteries to be Practically Viable journal May 2018
A Soft Approach to Encapsulate Sulfur: Polyaniline Nanotubes for Lithium-Sulfur Batteries with Long Cycle Life journal January 2012
More Reliable Lithium-Sulfur Batteries: Status, Solutions and Prospects journal April 2017
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A Polyaniline-Coated Sulfur/Carbon Composite with an Enhanced High-Rate Capability as a Cathode Material for Lithium/Sulfur Batteries journal May 2012
Review on High-Loading and High-Energy Lithium-Sulfur Batteries journal May 2017
Improved cyclability of lithium–sulfur battery cathode using encapsulated sulfur in hollow carbon nanofiber@nitrogen-doped porous carbon core–shell composite journal November 2014
Investigations of lithium–sulfur batteries using electrochemical impedance spectroscopy journal May 2013
Encapsulating sulfur into mesoporous TiO2 host as a high performance cathode for lithium–sulfur battery journal September 2013
Progress in the production and modification of PVDF membranes journal June 2011
Carbon nanomaterials for advanced lithium sulfur batteries journal April 2018
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A novel device structure for a low-cost Li–S battery journal January 2017
Strategies of constructing stable and high sulfur loading cathodes based on the blade-casting technique journal January 2017
Compact high volumetric and areal capacity lithium sulfur batteries through rock salt induced nano-architectured sulfur hosts journal January 2017
Sulfur@graphene oxide core–shell particles as a rechargeable lithium–sulfur battery cathode material with high cycling stability and capacity journal January 2013
A high sulfur content composite with core–shell structure as cathode material for Li–S batteries journal January 2013
Graphene-encapsulated sulfur (GES) composites with a core–shell structure as superior cathode materials for lithium–sulfur batteries journal January 2013
Polysulfide Shuttle Study in the Li/S Battery System journal January 2004

Cited By (6)

Current Status and Future Prospects of Metal–Sulfur Batteries journal May 2019
ZnS coating of cathode facilitates lean‐electrolyte Li‐S batteries journal October 2019
The immobilizing polysulfide mechanism of cadmium-doping carbon aerogels via a microtemplate for high performance Li–S batteries journal January 2020
Patterned macroporous Fe 3 C/C membrane-induced high ionic conductivity for integrated Li–sulfur battery cathodes journal January 2019
Core-shell S@C 3 N 4 nano-spheres as advanced adsorbent material for excellent lithium storage journal July 2019
Expansion-tolerant architectures for stable cycling of ultrahigh-loading sulfur cathodes in lithium-sulfur batteries journal January 2020

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