期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 61, 期 -, 页码 32-35出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2015.09.026
关键词
Lithium-ion battery; High voltage; Polymer electrolyte; Poly(ethyl alpha-cyanoacrylate)
资金
- National High Technology Research and Development Program of China (863 Program) [2013AA050905]
- 135 Projects Fund of CAS-QIBEBT Director Innovation Foundation [Y20604110F]
In order to overcome severe capacity fading of Ni-rich layered oxides Li[N1-x-yCoxMny]O-2 cathode of lithium-ion battery at elevated voltage, a composite membrane consisting of poly(ethylene terephthalate) (PET) nonwoven fabric incorporated with poly(ethyl alpha-cyanoacrylate) was investigated as polymer matrix of gel polymer electrolyte (GPE). The ionic conductivity of the GPE based on this composite membrane saturated with a liquid electrolyte (LE) of 1 M LiPF6 in carbonate solvents is 2.54 mS cm(-1) at room temperature, and the stable electrochemical voltage window can be up to 4.7 V. Its electrochemical performance is evaluated by using full cell with Li[Ni0.5Co0.2Mn0.3]O-2 as cathode and graphite as anode. These results demonstrate that the as-prepared GPE remarkably improves the cyclability at the high cut-off voltage compared to the commercial liquid electrolyte. (C) 2015 Elsevier B.V. All rights reserved.
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