新型锂离子电池电解液添加剂的合成与应用
发布时间：2018-08-03 20:39
【摘要】：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.
[Abstract]:A series of organic molecular double (2,3- ring carbonated glycerides) terephthalate, three (2,3- cyclic carbonate glyceride), benzoate and four (2,3- ring glyceride), four formate, was designed and synthesized. The rate test, constant current charge discharge test, AC impedance test and scanning electron microscope were used. The effect of these additives on the performance of lithium ion batteries was investigated by means of test and other means. By comparing the morphology of the spheroidizing graphite electrode before and after 20 cycles, it was found that the surface of the spheroidizing graphite electrode containing all benzoate and three benzoate can form a dense and stable solid electrolyte mesophase on the surface of the graphite electrode with the blank electrolyte. SEI), in order to optimize the interface performance of the electrode electrolyte and the increase of battery resistance, it is found that the addition of benzoate can improve the performance of the battery, while the addition of terephthalate can not improve the cycle energy of the battery when testing the rate performance of the battery.
【作者单位】： 天津科技大学化工与材料学院;天津科技大学理学院;杭州金色能源科技有限公司;
【基金】：国家自然科学基金(批准号:21373150)资助~~
【分类号】：O646;TM912
本文编号：2162933
[Abstract]:A series of organic molecular double (2,3- ring carbonated glycerides) terephthalate, three (2,3- cyclic carbonate glyceride), benzoate and four (2,3- ring glyceride), four formate, was designed and synthesized. The rate test, constant current charge discharge test, AC impedance test and scanning electron microscope were used. The effect of these additives on the performance of lithium ion batteries was investigated by means of test and other means. By comparing the morphology of the spheroidizing graphite electrode before and after 20 cycles, it was found that the surface of the spheroidizing graphite electrode containing all benzoate and three benzoate can form a dense and stable solid electrolyte mesophase on the surface of the graphite electrode with the blank electrolyte. SEI), in order to optimize the interface performance of the electrode electrolyte and the increase of battery resistance, it is found that the addition of benzoate can improve the performance of the battery, while the addition of terephthalate can not improve the cycle energy of the battery when testing the rate performance of the battery.
【作者单位】： 天津科技大学化工与材料学院;天津科技大学理学院;杭州金色能源科技有限公司;
【基金】：国家自然科学基金(批准号:21373150)资助~~
【分类号】：O646;TM912
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