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设计并合成了一系列基于苯环和环状碳酸酯的有机分子双(2,3-环碳酸甘油酯)对苯二甲酸酯、三(2,3-环碳酸甘油酯)均苯三甲酸酯和四(2,3-环碳酸甘油酯)均苯四甲酸酯,采用倍率测试、恒流充放电测试、交流阻抗测试和扫描电子显微镜测试等手段研究了这些添加剂对锂离子电池性能的影响.通过对循环20周前后球化石墨电极形貌的对比,发现含均苯四甲酸酯和均苯三甲酸酯的电解液球化石墨电极表面相对于空白电解液可形成一层致密而稳定的固体电解质中间相膜(SEI),从而优化电极-电解液的界面性能,且电池电阻增加较小;在测试电池的倍率性能时发现,均苯四甲酸酯的加入可以改善电池的倍率性能,而对苯二甲酸酯的加入则未能改善电池的循环性能.
A series of organic molecular bis (2,3-cyclocarbonate) terephthalate, tri (2,3-cyclocarbonate) trimesic acid based on benzene ring and cyclic carbonate were designed and synthesized. (2,3-cyclohexanecarboxylate) pyromellitic acid ester, the use of rate test, constant current charge and discharge test, AC impedance test and scanning electron microscopy tests and other means of these additives on the performance of lithium-ion batteries .The comparison of the morphologies of the spherodized graphite electrodes before and after 20 cycles showed that the surface of the spherodized graphite electrodes containing pyromellitates and trimellitates could form a dense layer with respect to the blank electrolyte Stable solid electrolyte mesophase film (SEI), so as to optimize the electrode-electrolyte interface performance, and increase the battery resistance is small; in the test of the battery’s rate performance found that the addition of pyromellitates can improve the battery magnification Performance, while the addition of terephthalate failed to improve the battery cycle performance.