Recent advances in anion-derived SEIs for fast-charging and stable lithium batteries
Ye Xiao , Rui Xu , Lei Xu , Jun-Fan Ding , Jia-Qi Huang
Energy Materials ›› 2021, Vol. 1 ›› Issue (2) : 100013
Recent advances in anion-derived SEIs for fast-charging and stable lithium batteries
The construction of stable and reliable electrode interfaces is one of the key scientific issues widely encountered by the battery community. An anion-derived solid electrolyte interphase (SEI) has been recently reported to outperform the traditional solvent-rich SEI in inhibiting side reactions, motivating ion transport and regulating electrode reactions in working Li batteries. Here, we first explicitly introduce the fundamental characteristics of anion-derived SEIs and then concisely present novel developments in electrolyte chemistry involving highly concentrated, localized highly concentrated and weakly solvating electrolytes, which facilitate the formation of anion-derived SEIs on anodes. The critical significance of these SEIs for building fast-charging and stable Li batteries is particularly highlighted. Finally, we outline the future challenges of designing Li metal interfaces to further enhance the cycling reversibility and lifespan of working batteries.
Lithium metal anode / solid electrolyte interphases / highly concentrated electrolytes / weakly solvating electrolytes / anion-derived SEIs
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