期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 17, 期 8, 页码 2167-2172出版社
SPRINGER
DOI: 10.1007/s10008-013-2072-9
关键词
Polymethyl methacrylate; Poly(vinylidene fluoride-co-hexafluoropropylene); Separator; Gel polymer electrolyte; Lithium-ion battery
资金
- National Natural Science Foundation of China
- Natural Science Foundation of Guangdong Province [U1134002]
- Natural Science Fund of Guangdong Province [10351063101000001]
- Joint Project of Guangdong Province
- Ministry of Education [2011B090400627]
- Graduate Research and Innovation Fund of South China Normal University [2012kyjj113]
Polyethylene-supported polymethyl methacrylate/poly(vinylidene fluoride-co-hexafluoropropylene) separator for gel polymer lithium-ion battery use was prepared with a mixed solvent of n-butanol and acetone. The prepared separator was characterized with scanning electron spectroscopy and X-ray diffraction, and its performance was investigated by electrochemical impedance spectroscopy and battery charge/discharge test. Compared to the separator prepared with acetone, the separator prepared with the mixed solvent shows an enhanced porosity (from 42 to 49 %) and electrolyte uptake (from 104 to 125 %). The ionic conductivity of the corresponding gel polymer electrolyte is improved from 2.81 to 3.39 mS cm(-1), the discharge capacity retention of the LiCoO2/artificial graphite battery is increased from 95 to 98 % after 100 cycles at 0.5 C, and the discharge capacity of the battery at 1 C increases by 4 %.
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