Thermal safety and performances analysis of gel polymer electrolytes synthesized by in situ polymerization for Li-ion battery

• Published in: Journal of solid state electrochemistry Vol. 25; no. 7; pp. 2021 - 2032
• Main Authors: Li, Libo, Xie, Ming, Zhang, Yonghong, Xu, Yanping, Li, Jia, Shan, Yuhang, Zhao, Yangmingyue, Zhou, Da, Chen, Xiaochuan, Cui, Wenjun
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 2021; Springer Nature B.V
• Subjects: Analytical Chemistry; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Differential scanning calorimetry; Electrochemistry; Electrolytes; Energy Storage; Infrared analysis; Lithium; Lithium-ion batteries; Original Paper; Physical Chemistry; Polymerization; Polymers; Polymethyl methacrylate; Rechargeable batteries; Thermal stability; Thermodynamic properties; Thermogravimetric analysis; Trifluoromethane; Non-isothermal method; Kinetics; Electrolyte; Li-ion battery; Thermoanalysis
• ISSN: 1432-8488; 1433-0768
• DOI: 10.1007/s10008-021-04965-3

This work obtained gel polymer electrolytes (GPEs) via in situ polymerization of methyl methacrylate (MMA) in the environment of lithium bis(trifluoromethane sulfonyl)imide (LiTFSI) and N-methyl-N-propylpyrrolidinium bis(trifluoromethane sulfonyl)amide (Py13TFSI). The thermogravimetric analysis (TGA) and the differential scanning calorimeter (DSC) determined the non-isothermal decomposition of Py13TFSI/LiTFSI/PMMA polymer electrolyte for Li-ion battery. TGA, DSC, and the infrared graph analyzed thermodynamic properties, and the results showed the addition of Py13TFSI significantly improved the thermostability of electrolytes. Flynn-Wall-Ozawa (Ozawa), Kissinger-Akahira-Sunose (KAS), and Friedman methods applied for kinetics characteristics to activation energy ( E a ) and pre-exponential factor ( A ). The E a value from Ozawa and KAS methods was 208.478 kJ mol −1 and 207.423 kJ mol −1 , respectively.