PVP/PVDF-HFP微孔聚合物电解质的制备及性能  

Preparation and properties of PVP/PVDF-HFP microporous polymer electrolyte

作　　者：杨波[1] 李新海[1] 郭华军[1] 王志兴[1] 黄思林[1] 李勇勇[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2012年第5期1628-1633,共6页Journal of Central South University:Science and Technology

基　　金：湖南省重大科技专项项目(2009FJ1002)

摘　　要：以聚偏氟乙烯-六氟丙烯(PVDF-HFP)和聚乙烯基吡咯烷酮(PVP)为基质材料,采用倒相法,在不同的PVP:PVDF-HFP配比下合成PVP/PVDF-HFP微孔聚合物电解质膜,将制备的微孔膜浸入电解液中活化得到了一系列锂离子电解质膜,并通过扫描电镜、力学、红外光谱进行能分析。研究结果表明:所制备的微孔聚合物电解质膜在PVP:PVDF-HFP配比(质量比)为0.2:1时综合性能最好,其吸液率为210%,抗拉强度为2.86 N/mm2,电导率为1.82×10-3 S/cm,电化学稳定窗口为5.7 V。PVP/PVDF-HFP micropores membranes based on PVDF-HFP and PVP were prepared by the phase transfer method with different mass ratios of PVP to PVDF-HFP.The membranes were characterized by means of SEM,FTIR,AC impedance and linear scan voltammetry methods.The results show that the optimium mass ratio of PVP to PVDF-HFP is 0.2：1.The liquid absorption rate of the polymer electrolyte is 210%.It shows a good tensile strength of 2.86 N/mm2.The ionic conductivity is 1.82×10？3 S/cm,and the electrochemical stable window is 5.7 V.

关 键 词：聚合物电解质 锂离子电池 倒相法 离子电导率 

分 类 号：TM912[电气工程—电力电子与电力传动]