PVP/PVDF-HFP微孔聚合物电解质的制备及性能
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 李新海 郭华军 王志兴 黄思林 李勇勇
YANG Bo,LI Xin-hai,GUO Hua-jun,WANG Zhi-xing,HUANG Si-ling,LI Yong-yong (School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China)
机构地区: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》 EI CAS CSCD 2012年第43卷第5期 1628-1633页,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
polymer electrolyte Li-ion battery phase inversion ionic conductivity
分 类 号:TM912 [工业技术 > 电工技术 > 独立电源技术(直接发电)]
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