聚醚侧链型聚硅氧烷对含氟聚合物凝胶锂离子电解质膜性能的影响  

Effects of PDMS with polyether side chains on the fluoropolymer based gel lithium electrolytes

作　　者：张诚[1] 陈月明[1] 李浩[2] 麻小挺[2] 朱宝库[2] 

机构地区：[1]浙江工业大学化学工程与材料学院,浙江杭州310014 [2]浙江大学高分子科学与工程学系,教育部高分子合成与功能构造重点实验室,浙江杭州310027

出　　处：《功能材料》2010年第10期1784-1787,1791,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(20974094);国家重点基础研究发展计划(973计划)资助项目(2009CB623402)

摘　　要：通过浸没沉淀相转化法制备了具有类似孔结构的聚醚侧链型聚硅氧烷(PDMS-g-(PPO-PEO))改性的聚偏氟乙烯(PVDF)和聚偏氟乙烯-六氟丙烯(PVDF-HFP)多孔骨架,经电解液活化后得到凝胶电解质膜,研究了PDMS-g-(PPO-PEO)对含氟聚合物凝胶电解质膜性能的影响。由改性PVDF和PVDF-HFP骨架被电解液活化制备的聚合物凝胶电解质膜,离子电导率分别达到2.2×10-3和1.7×10-3S/cm,综合分析凝胶电解质膜中电解液稳定性和膜的电化学性能发现,PDMS-g-(PPO-PEO)对PVDF骨架的改性效果明显优于PVDF-HFP骨架,共混改性后PVDF可代替PVDF-HFP作为隔膜作为锂离子电池凝胶电解质膜。A series of PVDF/（PDMS-g-（PPO-PEO））and PVDF-HFP/（PDMS-g-（PPO-PEO））blend separators was prepared via phase inversion route in this work.After being activated with lithium electrolyte solution,the blend separators having proper porous structure were converted into corresponding lithium gel electrolyte membranes.By measuring the stability of electrolyte,electrochemical stability and ionic conductivity etc,the effects of PDMS-g-（PPO-PEO）on properties of lithium gel electrolyte membranes were investigated and discussed.The ionic conductivity of blend PVDF/PDMS-g-（PPO-PEO）and PVDF-HFP/PDMS-g-（PPO-PEO）lithium gel electrolyte membrane reached as high as 2.2×10-3 and 1.7×10-3S/cm respectively.Together with its higher stability of electrolyte solution uptake,the PVDF/PDMS-g-（PPO-PEO）blend separator presented in this work should contribute the more proper matrix in gel electrolyte membrane used for lithium batteries.

关 键 词：聚硅氧烷 多孔隔膜 含氟聚合物 锂离子电池 凝胶电解质 

分 类 号：TM911.3[电气工程—电力电子与电力传动]