塑晶聚合物电解质在锂离子电池中的应用
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摘要
采用溶剂挥发法制备了塑晶聚合物电解质膜。通过红外(FTIR),扫描电镜(SEM)对其内部基团结构及形貌进行了表征,采用DSC,万能材料试验机对其热稳定性及机械性能进行测试,采用循环伏安,交流阻抗以及恒流充放电对其电化学性能进行测试。结果表明,塑晶聚合物电解质具有良好的机械性能、较高室温电导率以及较宽的化学稳定窗口,在室温下其电导率约为0.9×10~(-3)S/cm。
The plastic crystal polymer electrolyte was synthesized by one step solvent evaporation method. The structure and morphology of plastic crystal polymer electrolyte were characterized by Fourier transform infrared spectroscopy(FTIR) and scanning electron microscope, the thermal stability and mechanical property were characterized by differential scanning calorimetry(DSC) and universal materials testing machine, and the electrochemical performance was studied by cyclic voltammetry(CV), impedance spectra, and constant-current charge and discharge. It turns out that plastic crystal polymer electrolyte is mechanical tough, by the mean time, it has high room-temperature conductivity and a wide electrochemical stability window, and the ambient temperature conductivities reaches 0.9×10~(-3)S/cm.
The plastic crystal polymer electrolyte was synthesized by one step solvent evaporation method. The structure and morphology of plastic crystal polymer electrolyte were characterized by Fourier transform infrared spectroscopy(FTIR) and scanning electron microscope, the thermal stability and mechanical property were characterized by differential scanning calorimetry(DSC) and universal materials testing machine, and the electrochemical performance was studied by cyclic voltammetry(CV), impedance spectra, and constant-current charge and discharge. It turns out that plastic crystal polymer electrolyte is mechanical tough, by the mean time, it has high room-temperature conductivity and a wide electrochemical stability window, and the ambient temperature conductivities reaches 0.9×10~(-3)S/cm.
引文
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[2]张鹏,李琳琳,何丹农,等.锂离子电池凝胶聚合物电解质研究进展[J].高分子学报,2011(2):125-131.
[3]赵旭东,朱文,李镜人,等.全固态锂离子电池用PEO基聚合物电解质的研究进展[J].材料导报,2014,28(7):13-17.
[4]ALARCO P J,ABU-LEBDEH Y,ABOUIMRANE A,et al.The plastic-crystalline phase of succinonitrile as a universal matrix for solid-state ionic conductors[J].Nature Materials,2004,3(7):476-481.
[5]MACFARLANE D R,FORSYTH M.Plastic crystal electrolyte materials:New perspectives on solid state ionics[J].Advanced materials,2001,13(12/13):957-966.
[6]范欢欢,周栋,范丽珍,等.现场聚合制备锂离子电池用凝胶聚合物电解质研究进展[J].硅酸盐学报,2013,41(2):134-139.
[7]LIANG X,YANG Y,JIN X,et al.The high performances of SiO2/Al2O3-coated electrospun polyimide fibrous separator for lithium-ion battery[J].Journal of Membrane Science,2015,493:1-7.
[8]江清柏.多孔型聚合物电解质的界面性能及其机械性能研究[D].长沙:长沙理工大学,2015.
[9]张飞.用于全固态超级电容器的PVA聚合物电解质膜的制备及其电化学性能研究[D].武汉:武汉工程大学,2016.