Nonflammable Electrolytes for Lithium Ion Batteries
Enabled by Ultraconformal Passivation Interphases
Posted on 2019-09-24 - 13:35
The
approaches enhancing the energy density of lithium (Li)-ion
batteries (LIBs) often push the batteries to their safety limit. Therefore,
electrolytes that not only enhance electrochemical performances but
also improve safety properties of LIBs are urgently needed for further
development of LIBs. Although organic phosphorus-containing solvents
have been used with organic carbonates to form flame-retarding or
nonflammable electrolytes, their poor compatibility with the graphite
anodes leads to fast capacity fade of LIBs. Herein we report a promising
approach by formulating a nonflammable localized high-concentration
electrolyte based on triethyl phosphate, ethylene carbonate, and a
partially fluorinated ether. This electrolyte readily generates a
robust solid electrolyte interphase on the graphite anode and a cathode
electrolyte interphase on the LiNi0.8Mn0.1Co0.1O2 (NMC811) cathode. As a result, this electrolyte
shows good compatibility with both the graphite anode and the
high-voltage cathode and enables long-term cycling stability of the
graphite||NMC811 cells. This work sheds new light in the development
of nonflammable electrolytes for high-energy-density LIBs.
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Cao, Xia; Xu, Yaobin; Zhang, Linchao; Engelhard, Mark H.; Zhong, Lirong; Ren, Xiaodi; et al. (2019). Nonflammable Electrolytes for Lithium Ion Batteries
Enabled by Ultraconformal Passivation Interphases. ACS Publications. Collection. https://doi.org/10.1021/acsenergylett.9b01926
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AUTHORS (15)
XC
Xia Cao
YX
Yaobin Xu
LZ
Linchao Zhang
ME
Mark H. Engelhard
LZ
Lirong Zhong
XR
Xiaodi Ren
HJ
Haiping Jia
BL
Bin Liu
CN
Chaojiang Niu
BM
Bethany E. Matthews
HW
Haiping Wu
BA
Bruce W. Arey
CW
Chongmin Wang
JZ
Ji-Guang Zhang
WX
Wu Xu