Composite polymer electrolyte membranes supported by non-woven fabrics for lithium-ion polymer batteries  

作　　者：TANGDingguo LIUJianhong QILu CHENHui CIYunxiang 

机构地区：[1]CollegeofChemistryandMolecularEngineering,PekingUniversity,Beijing100871,China [2]CITICGuoanMengguliPowerSourceTechnologyCo.Ltd.,Beijing102200,China

出　　处：《Chinese Science Bulletin》2005年第6期501-504,共4页

摘　　要：Poly(vinylidene fluoride-co-hexafluoropropyle- ne) (PVDF-HFP) is one of the most popular polymers for polymer electrolyte membranes because of its excellent oper- ating characteristics and superior electrochemical properties. The electrochemical performances of polymer electrolyte membrane can be enhanced by evenly dispersing nano-meter SiO2 particles in the polymer. In this paper, non-woven fab- rics were immersed in the mixed solution of PVDF-HFP/ SiO2/butanone/butanol/plasticizer, and then dried in a vac- uum oven to remove the solvents and the plasticizer and to make porous composite polymer electrolyte membranes. The prepared composite membranes supported by non-woven fabrics boast good mechanical strength and excellent elec- trochemical properties: the electrochemical stability window is 4.8 V vs. Li+/Li, and the ionic conductivity is 3.35×10?4 S/cm (around 60% of that of a common PE membrane) at room temperature. The lithium-ion polymer battery assem- bled by the composite membrane exhibits high rate capabil- ity and excellent cycling performance.Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) is one of the most popular polymers for polymer electrolyte membranes because of its excellent operating characteristics and superior electrochemical properties. The electrochemical performances of polymer electrolyte membrane can be enhanced by evenly dispersing nano-meter SiO2 particles in the polymer. In this paper, non-woven fabrics were immersed in the mixed solution of PVDF-HFP/SiO2/butanone/butanoUplasticizer, and then dried in a vacuum oven to remove the solvents and the plasticizer and to make porous composite polymer electrolyte membranes. The prepared composite membranes supported by non-woven fabrics boast good mechanical strength and excellent electrochemical properties: the electrochemical stability window is 4.8 V vs. Li+/Li, and the ionic conductivity is 3.35x10(-4) S/cm (around 60% of that of a common PE membrane) at room temperature. The lithium-ion polymer battery assembled by the composite membrane exhibits high rate capability and excellent cycling performance.

关 键 词：电解液薄膜 锂离子聚合物电池 密度 电化学特性 LICOO2 非机织织物 

分 类 号：TM911.1[电气工程—电力电子与电力传动]