新型有机硅基离子塑晶材料作为固态电解质用于锂离子电池（英文）

发布时间：2018-03-15 13:06

本文选题：有机硅　切入点：离子塑晶　出处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2016年02期 　论文类型：期刊论文

【摘要】：目的:合成新型的有机硅基离子塑晶材料[DTMA][TFSI],测试材料的物理和电化学性能,研究其掺杂改性并作为固态电解质用于锂离子电池。创新点:1.合成新型的有机硅基离子型塑晶材料;2.将三元复合塑晶材料作为固态电解质在室温下用于锂离子电池。方法:1.通过热性能分析,得到材料的塑晶温度区间和融化熵值(图1和表1);2.通过电导率测试,确定塑晶掺杂对导电性能的影响(图2);3.通过对扣式电池的充放电性能、倍率性能、循环性能以及阻抗的测试(图4~7),得到塑晶复合物作为固态电解质的电化学性能以及电池循环的稳定性和可逆性。结论:1.合成新型有机硅基离子塑晶材料[DTMA][TFSI],塑晶温度区间为 26°C到54°C;2.在纯塑晶IPC中添加10% LiODFB和10%PC,得到复合物的电导率为1×10~(-4) S/cm,提高塑晶作为固态电解质在室温下应用的可行性;3.将复合物用于LiFePO_4/Li半电池测试,在C/20倍率下,电池的放电比容量为144 mA·h/g,库伦效率为99%。在50次循环后,容量保持率为94%;4.测试结果表明,新型有机硅基离子塑晶的复合物可作为固态电解质材料应用于锂离子电池,以及更高能量密度的锂-硫和锂-空电池。
[Abstract]:Objective: to synthesize new organosilicon-based ionic plasticized material [DTMA] [TFSI], and to test the physical and electrochemical properties of the material. The doping modification was studied and used as solid electrolyte for lithium-ion batteries. Innovation point 1. Synthesis of novel organosilicon-based ionic plastic-crystalline materials. The ternary composite plastic-crystalline materials were used as solid electrolytes for lithium ion electrolysis at room temperature. Method 1. Through thermal performance analysis, The temperature range and melting entropy of the material were obtained (Fig. 1 and Table 1). The effect of doping on conductivity was determined by electrical conductivity test (fig. 2 / 3). The electrochemical performance of plastic-crystalline composite as solid electrolyte and the stability and reversibility of battery cycle were obtained. Conclusion: 1. Synthesis of new organosilicon-based ionic plasticized material [DTMA] [TFSI], plastic crystal temperature. The electrical conductivity of the composite was 1 脳 10 ~ (-4) S / cm, which improved the feasibility of using the composite as a solid electrolyte at room temperature. The composite was used in the LiFePO_4/Li semi-battery test. At C / 20, the specific discharge capacity of the battery is 144 Ma 路h / g, and the Coulomb efficiency is 990.After 50 cycles, the capacity retention rate is 940.The test results show that the new organosilicon-based plastic-crystal composite can be used as a solid electrolyte material for lithium ion batteries. And higher energy density lithium-sulfur and lithium-air batteries.
【作者单位】： Key
【基金】：supported by the Special Support Program of Guangdong Province for High-level Talents(No.2014TX01N014) the Guangdong Provincial for Science&Technology(Nos.2013B091300017 and 2014A050503050) the Guangzhou Municipal for Science&Technology(No.201423/2014Y2-00219) the Dongguan Municipal Collaboration for Industry&Science(No.2013509104210),China
【分类号】：TM912;TB34

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