RESEARCH ON LOW-COST FLUORINE-FREE AQUEOUS MIXED SOLVENT LITHIUM ACETATE ELECTROLYTES

被引：0
|
作者：
Wu F. [1 ,2 ,3 ]
Jiang W. [1 ,2 ,3 ,4 ]
Luo M. [1 ,3 ,4 ]
Wu Y. [1 ,2 ,3 ,4 ]
Zhang Y. [5 ]
He W. [5 ]
机构：
[1] National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy, GRINM Group Co.，Ltd., Beijing
[2] GRIMAT Engineering Institute Co.，Ltd., Beijing
[3] General Research Institute for Nonferrous Metals, Beijing
[4] GRINM（Guangdong）Institute for Advanced Materials and Technology, Foshan
[5] School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2023年 / 44卷 / 08期
关键词：
electrolyte; energy storage; lithium-ion batteries; solvation;
D O I：
10.19912/j.0254-0096.tynxb.2022-0560
中图分类号：
学科分类号：
摘要：
Using 1，5-pentanediol（PD）and polyethylene glycol（PEG）as co-solvent to improve the electrochemical performance of 13 m（m=［mol salt］［/ kg solvent］）LiOAc as aqueous lithium-ion batteries electrolytes obtains low-cost fluorine-free aqueous mixed solvent lithium acetate electrolytes. The activity of water molecules in the electrolyte was characterized by infrared absorption and Roman scattering spectroscopy. The results show that in the mixed solvent electrolytes the activity of water molecules is inhibited. Electrochemical tests show that the electrolytes have the widest electrochemical stability window of 3.10 V when the electrolyte composition is 2 m LiOAc-PD0.5PEG0.5，which makes the negative electrode Li4Ti5O12 reversibly charge and discharge. Li4Ti5O12//LiMn2O4 full cell with 2 m LiOAc-PD0.5PEG0.5 tests show an initial platform voltage of 2.3 V and specific energy of 0.0616 kWh/kg，which obtains higher capacity and cycle stability than 13 m LiOAc electrolytes. © 2023 Science Press. All rights reserved.
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页码：17 / 22
页数：5
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