Jump to main content
Jump to site search


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

Author affiliations

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. Herein, 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. Thus, 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.

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

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Sep 2018, accepted on 22 Nov 2018 and first published on 22 Nov 2018


Article type: Paper
DOI: 10.1039/C8TA09059A
Citation: J. Mater. Chem. A, 2018, Advance Article
  •   Request permissions

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

    R. Yu, S. Chung, C. Chen and A. Manthiram, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA09059A

Search articles by author

Spotlight

Advertisements