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High‐Performance Silicon Anodes Enabled By Nonflammable Localized High‐Concentration Electrolytes
Author(s) -
Jia Haiping,
Zou Lianfeng,
Gao Peiyuan,
Cao Xia,
Zhao Wengao,
He Yang,
Engelhard Mark H.,
Burton Sarah D.,
Wang Hui,
Ren Xiaodi,
Li Qiuyan,
Yi Ran,
Zhang Xin,
Wang Chongmin,
Xu Zhijie,
Li Xiaolin,
Zhang JiGuang,
Xu Wu
Publication year - 2019
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201900784
Subject(s) - electrolyte , anode , materials science , electrochemistry , chemical engineering , cathode , silicon , lithium (medication) , graphite , interphase , energy storage , energy density , nanotechnology , electrode , composite material , engineering physics , metallurgy , electrical engineering , chemistry , medicine , power (physics) , physics , quantum mechanics , biology , engineering , genetics , endocrinology
Silicon anodes are regarded as one of the most promising alternatives to graphite for high energy‐density lithium‐ion batteries (LIBs), but their practical applications have been hindered by high volume change, limited cycle life, and safety concerns. In this work, nonflammable localized high‐concentration electrolytes (LHCEs) are developed for Si‐based anodes. The LHCEs enable the Si anodes with significantly enhanced electrochemical performances comparing to conventional carbonate electrolytes with a high content of fluoroethylene carbonate (FEC). The LHCE with only 1.2 wt% FEC can further improve the long‐term cycling stability of Si‐based anodes. When coupled with a LiNi 0.3 Mn 0.3 Co 0.3 O 2 cathode, the full cells using this nonflammable LHCE can maintain >90% capacity after 600 cycles at C/2 rate, demonstrating excellent rate capability and cycling stability at elevated temperatures and high loadings. This work casts new insights in electrolyte development from the perspective of in situ Si/electrolyte interphase protection for high energy‐density LIBs with Si anodes.