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Electrolyte Regulation towards Stable Lithium‐Metal Anodes in Lithium–Sulfur Batteries with Sulfurized Polyacrylonitrile Cathodes
Author(s) -
Chen WeiJing,
Li BoQuan,
Zhao ChangXin,
Zhao Meng,
Yuan TongQi,
Sun RunCang,
Huang JiaQi,
Zhang Qiang
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201912701
Subject(s) - electrolyte , anode , polyacrylonitrile , materials science , cathode , lithium (medication) , faraday efficiency , energy storage , battery (electricity) , lithium metal , nanoarchitectures for lithium ion batteries , carbon fibers , chemical engineering , inorganic chemistry , chemistry , electrode , composite material , polymer , medicine , power (physics) , physics , engineering , quantum mechanics , endocrinology , composite number
Lithium–sulfur (Li–S) batteries are highly regarded as the next‐generation energy‐storage devices because of their ultrahigh theoretical energy density of 2600 Wh kg −1 . Sulfurized polyacrylonitrile (SPAN) is considered a promising sulfur cathode to substitute carbon/sulfur (C/S) composites to afford higher Coulombic efficiency, improved cycling stability, and potential high‐energy‐density Li–SPAN batteries. However, the instability of the Li‐metal anode threatens the performances of Li–SPAN batteries bringing limited lifespan and safety hazards. Li‐metal can react with most kinds of electrolyte to generate a protective solid electrolyte interphase (SEI), electrolyte regulation is a widely accepted strategy to protect Li‐metal anodes in rechargeable batteries. Herein, the basic principles and current challenges of Li–SPAN batteries are addressed. Recent advances on electrolyte regulation towards stable Li‐metal anodes in Li–SPAN batteries are summarized to suggest design strategies of solvents, lithium salts, additives, and gel electrolyte. Finally, prospects for future electrolyte design and Li anode protection in Li–SPAN batteries are discussed.