导电聚合物电解质隔膜PEO/LiPCSI的制备及性能研究  

Preparation and properties of conductive polymer electrolyte diaphragm PEO/LiPCSI

作　　者：付茹 王子阳 邹海凤 陈卓 程琥 Fu Ru;Wang Ziyang;Zou Haifeng;Chen Zhuo;Cheng Hu(Key Laboratory of Functional Materials and Chemistry of Guizhou Province,School of Chemistry and Materials Science,Guizhou Normal University,Guiyang 550001)

机构地区：[1]贵州师范大学化学与材料科学学院,贵州省功能材料化学重点实验室,贵阳550001

出　　处：《化工新型材料》2024年第7期143-147,156,共6页New Chemical Materials

基　　金：国家自然科学基金(22062004)。

摘　　要：以对苯乙烯磺酸钠为原料,通过酰化、氨解、离子交换和聚合反应制得单离子导体聚[(对苯乙烯磺酰)(氰基)亚胺锂](LiPCSI),以聚氧化乙烯(PEO)为聚合物基质,通过溶液浇铸法制备了导电聚合物电解质隔膜PEO/LiPCSI。采用傅里叶变换红外光谱仪、核磁共振波谱仪对LiPCSI的结构进行分析,采用扫描电子显微镜、热重分析仪和电化学工作站对电解质隔膜性能进行了表征。结果表明,氧锂摩尔比(EO/Li^(+))不同的电解质隔膜均具有良好的热稳定性,其中EO/Li^(+)=10的电解质隔膜电化学性能最优,其离子电导率为2.99×10^(-5)S/cm,锂离子迁移数接近于1(锂离子迁移数tLi^(+)=0.94),电化学稳定窗口达到4.77V。Using sodium p-styrenesulfonate as raw material,a single-ion conductor lithium poly[(p-styrene sulfonyl)(cyano)imide](LiPCSI)was prepared by acylation,ammonolysis,ion exchange and polymerization reaction.A conducive polymer electrolyte diaphragm(PEO/LiPCSI)was prepared by solution casting method with poly(ethylene oxide)(PEO)as polymer matrix.The structure of LiPCSI was analyzed by Fourier transform infrared spectroscopy(FT-IR)and nuclear magnetic resonance spectroscopy.The properties of the electrolyte diaphragm were characterized by scanning electron microscopy(SEM),thermogravimetry analyzer(TG)and electrochemical workstation.The results showed that the electrolyte diaphragms with different oxygen-lithium ratio by mole(EO/Li^(+))had good thermal stability,among which the electrolyte diaphragm with EO/Li^(+)=10 had the best electrochemical performance.Its ion conductivity was 2.99×10^(-5) S/cm,the lithium-ion migration number was close to 1(t Li^(+)=0.94),and the electrochemical stabilization window reached 4.77V.

关 键 词：锂单离子导体 聚合物电解质 电化学性能 聚氧化乙烯 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ317[化学工程—高聚物工业]