TiS2-Polysulfide Hybrid Cathode with High Sulfur Loading and Low Electrolyte Consumption for Lithium-Sulfur Batteries

Sheng Heng Chung, Liu Luo, Arumugam Manthiram

研究成果: Article

70 引文 斯高帕斯(Scopus)

摘要

Sulfur cathodes have a high theoretical capacity of 1675 mAh g-1, making the lithium-sulfur batteries a promising technology for future energy-storage devices. However, their commercial viability is faced with challenges arising from intrinsic electrochemical instabilities and inappropriate cell fabrication parameters. We report here the feasibility of employing TiS2 as a conductive polysulfide adsorbent, which allows the use of a high amount of electrochemically active polysulfides in building a TiS2-polysulfide hybrid cathode. The hybrid cathode exhibits long cycle stability at a C/5 rate over 200 cycles with a high areal capacity and energy density of, respectively, 10 mAh cm-2 and 20 mWh cm-2, exceeding those of commercial LiCoO2. Such an enhanced electrochemical performance is obtained in cells with a high sulfur content (65 wt %), high sulfur loading (12 mg cm-2), high sulfur mass (12 mg/cathode), and a low electrolyte/sulfur ratio of just 5 μL mg-1.

原文English
頁(從 - 到)568-573
頁數6
期刊ACS Energy Letters
3
發行號3
DOIs
出版狀態Published - 2018 三月 9

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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