Confining Sulfur in Porous Carbon by Vapor Deposition to Achieve High-Performance Cathode for All-Solid-State Lithium-Sulfur Batteries

Atif S. Alzahrani, Mitsutoshi Otaki, Daiwei Wang, Yue Gao, Timothy S. Arthur, Shuai Liu, Donghai Wang

Research output: Contribution to journalArticlepeer-review

Abstract

All-solid-state lithium-sulfur batteries (ASLBs) have the potential to achieve high energy density because of sulfur's high theoretical capacity (1672 mAh g-1) while alleviating persistent polysulfide shuttling inherent to lithium-sulfur batteries based on liquid organic electrolyte. However, the homogenization of sulfur, carbon, and solid electrolyte is a challenge to achieving high-performance cathodes for ASLBs. Herein, we demonstrate a promising sulfur-carbon composite with high sulfur content (71.4-83.3%) prepared using a sulfur vapor deposition (SVD) approach to show enhanced discharge specific capacities, rate performance, and cycling stability, outperforming conventional sulfur liquid deposition (SLD) and sulfur solid deposition (SSD) approaches. A higher discharge specific sulfur capacity of 1792.6 mAh g-1 has been achieved at 0.1C and 60 °C with improvement ascribed to smaller particle size and more homogeneous and deeply confined sulfur in sulfur-carbon composite, in contrast to 1619.2 and 1329.3 mAh g-1 for samples prepared by conventional SLD and SSD approaches, respectively.

Original languageEnglish (US)
Pages (from-to)413-418
Number of pages6
JournalACS Energy Letters
Volume6
Issue number2
DOIs
StatePublished - Feb 12 2021

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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