Asymmetric allyl-activation of organosulfides for high-energy reversible redox flow batteries

Guo Ming Weng, Bin Yang, Chi You Liu, Guan Ying Du, Elise Y. Li*, Yi Chun Lu


研究成果: 雜誌貢獻回顧評介論文同行評審

32 引文 斯高帕斯(Scopus)


Organosulfides (R-Sn-R) exhibit a high theoretical capacity and low cost, but suffer from sluggish kinetics and poor reversibility. Here, we demonstrate an effective and universal strategy to improve their redox activity by replacing one organic functional group with an allyl (A) to form asymmetric allyl-substituted organosulfides (R-Sn-A). This promotes the cleavage of the A-S bond owing to facile generation of allyl radials, thereby improving the reduction kinetics and capacity. We verified the formation of asymmetric organosulfides by gas-chromatography-mass spectrometry and show that the allyl-activation strategy is universal to a series of functional groups. We successfully increased the discharge potential (up to 280 mV) and discharge capacity (up to 200%) of the organosulfide compared to its symmetric counterpart. A highly-concentrated liquid electrolyte (5 M) with a volumetric capacity of 224 A h L-1 was realized, demonstrating a substantial improvement in volumetric capacity compared to other reported liquid electrolytes to date. This strategy revitalizes organosulfides for high-energy and low-cost energy storage applications.

頁(從 - 到)2244-2252
期刊Energy and Environmental Science
出版狀態已發佈 - 2019 7月

ASJC Scopus subject areas

  • 環境化學
  • 可再生能源、永續發展與環境
  • 核能與工程
  • 污染


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