| PREPARATION AND ELECTROCHEMICAL CHARACTERISTICS OF POLYMER ELECTROLYTE MEMBRANES BASED ON SAN/PVDF-HFP BLENDS |
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| 作者姓名： | 其鲁 |
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| 作者单位： | College of |
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| 摘 要： | A copolymer of poly(acrylonitrile-co-styrene) (SAN) was synthesized via an emulsion polymerization method. Novel polymer electrolyte membranes cast from the blends of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), SAN and fumed silica (SiO2) are microporous and can be used in polymer lithium-ion batteries. The membrane shows excellent characteristics such as high ionic conductivity and good mechanical strength when the mass ratio between SAN and PVDF-HFP and SiO2 is 3.5/31.5/5. The ionic conductivity of the membrane soaked in a liquid electrolyte of 1 mol/L LiPF6/EC/DMC/DEC is 4.9×10-3 S cm-1 at 25℃. The membrane is electrochemical stable up to 5.5 V versus Li /Li in the liquid electrolyte. The influences of SiO2 content on the porosity and mechanical strength of the membranes were studied. Polymer lithium-ion batteries based on the membranes were assembled and their performances were also studied.
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| 关 键 词： | 聚合体电解膜 聚（丙烯腈-共-苯乙烯） 聚合体锂离子电池 合成 电气化学性质 |
| 收稿时间： | 2005-04-30 |
| 修稿时间： | 2005-06-27 |
PREPARATION AND ELECTROCHEMICAL CHARACTERISTICS OF POLYMER ELECTROLYTE MEMBRANES BASED ON SAN/PVDF-HFP BLENDS |
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| Ding-guo Tang,Lu Qi,Yun-xiang Ci.PREPARATION AND ELECTROCHEMICAL CHARACTERISTICS OF POLYMER ELECTROLYTE MEMBRANES BASED ON SAN/PVDF-HFP BLENDS[J].Chinese Journal of Polymer Science,2006,0(2):213-220. |
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| Authors: | Ding-guo Tang Lu Qi Yun-xiang Ci |
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| Institution: | College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China |
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| Abstract: | A copolymer of poly(acrylonitrile-co-styrene) (SAN) was synthesized via an emulsion polymerization method.Novel polymer electrolyte membranes cast from the blends of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), SAN and fumed silica (SiO2) are microporous and can be used in polymer lithium-ion batteries. The membrane shows excellent characteristics such as high ionic conductivity and good mechanical strength when the mass ratio between SAN and PVDF-HFP and SiO2 is 3.5/31.5/5. The ionic conductivity of the membrane soaked in a liquid electrolyte of 1 mol/L LiPF6/EC/DMC/DEC is 4.9 × 10-3 Scm-1 at 25℃. The membrane is electrochemical stable up to 5.5 V versus Li /Li in the liquid electrolyte. The influences of SiO2 content on the porosity and mechanical strength of the membranes were studied.Polymer lithium-ion batteries based on the membranes were assembled and their performances were also studied. |
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| Keywords: | Polymer electrolyte membrane Blends Poly(acrylonitrile-co-styrene) Polymer lithium-ion battery BASED POLYMER ELECTROLYTE MEMBRANES CHARACTERISTICS ELECTROCHEMICAL PREPARATION based performances influences content porosity membranes electrochemical stable liquid electrolyte characteristics high ionic conductivity good mechanical strength |
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