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2.99×10-5S/cm,锂离子迁移数接近于1(锂离子迁移数t<sub>Li+=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 2.99×10-5S/cm,the lithium-ion migration number was close to 1 (t<sub>Li+=0.94),and the electrochemical stabilization window reached 4.77V.
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基金资助
国家自然科学基金(22062004)
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