玻璃纤维布基多层复合固态电解质的制备及其性能

doi:10.19799/j.cnki.2095-4239.2022.0113

储能科学与技术 ›› 2022, Vol. 11 ›› Issue (10): 3090-3099.doi: 10.19799/j.cnki.2095-4239.2022.0113

玻璃纤维布基多层复合固态电解质的制备及其性能

廖敏会¹^,²(), 杨大祥¹^,²^,³(), 周洋¹^,², 万仁杰³, 刘瑞平⁴, 王强¹^,²^,³

^1.重庆交通大学绿色航空技术研究院
^2.绿色航空能源动力重庆市重点实验室
^3.重庆交通大学，重庆 401120
^4.中国矿业大学，北京 100083

收稿日期:2022-03-04 修回日期:2022-03-07 出版日期:2022-10-05 发布日期:2022-10-10
通讯作者: 杨大祥 E-mail:939551239@qq.com;361425973@qq.com
作者简介:廖敏会（1991—），女，硕士，工程师，从事固态电解质研究，E-mail：939551239@qq.com；
基金资助:
绿色航空能源动力重庆市重点实验室开放基金(GATRI2021F01003B)

Preparation and properties study of glass fiber cloth-based multilayer composite solid electrolyte

Minhui LIAO¹^,²(), Daxiang YANG¹^,²^,³(), Yang ZHOU¹^,², Renjie WAN³, Ruiping LIU⁴, Qiang WANG¹^,²^,³

^1.The Green Aerotechnics Research Institute of Chongqing Jiaotong University
^2.Chongqing Key Laboratory of Green Aviation Energy and Power
^3.Chongqing Jiaotong University, Chongqing 401120, China
^4.China Mining University, Beijing 100083, China

Received:2022-03-04 Revised:2022-03-07 Online:2022-10-05 Published:2022-10-10
Contact: Daxiang YANG E-mail:939551239@qq.com;361425973@qq.com

摘要/Abstract

摘要：

以双三氟甲基磺酰亚胺锂(LiTFSI)为锂盐，利用玻璃纤维布、聚环氧乙烯(PEO)、1-乙基-3-甲基咪唑双三氟甲磺酰亚胺盐[(EMIM)TFSI]、锂镧锆氧(LLZO)纳米颗粒等为原料，采用溶液浇筑法制备不同锂镧锆氧含量的玻璃纤维基多层复合固态电解质膜，通过该4种物质的协同作用扩大PEO的非晶相区域、改善膜的界面兼容性等，综合提高膜的离子导电率；同时，利用玻璃纤维布表面Si—O和—OH官能团引导锂离子的均匀沉积，抑制锂枝晶的生长。结果表明，30 ℃条件下，添加质量比为5% LLZO的玻璃纤维布/PEO/ILs/LLZO(SPE)复合固态电解质膜的离子电导率为3.53×10^-4 S/cm，工作电压窗口为5.18 V，离子迁移数为0.33，所制备的磷酸铁锂(LFP)/SPE/Li和镍钴锰酸锂(NCM₆₂₂)/SPE/Li固态电池0.1 C放电容量分别为165 mAh/g和226 mAh/g。其中，LFP/SPE/Li电池 0.5 C循环120次，放电容量为120 mAh/g，容量保持率为99.8%，此外，循环前后阻抗变化较小，具有优异的界面稳定性。

关键词: 多层复合固态电解质膜, 玻璃纤维布, [EMIM]TFSI, 离子电导率, 固态电池

Abstract:

Lithium bistrifluoromethanesulfonimide (LiTFSI) was used as a lithium salt. Glass fiber cloth, polyethylene oxide (PEO), 1-ethyl-3-methylimidazole bis-trifluoromethanesulfonimide salt ([EMIM]TFSI) and LLZO nanoparticles were used as raw materials. Glass fiber-based multilayer composite solid electrolyte membranes with different LLZO contents were prepared by the solution casting method. Enlarging the amorphous phase region of PEO and improving the interface compatibility of the film can improve the ionic conductivity of the film, and at the same time, using Si-O and -OH functional groups on the surface of glass fiber cloth can guide the uniform deposition of lithium ions and inhibit the growth of lithium dendrites. The results show that under the condition of 30 ℃, the ionic conductivity of glass fiber cloth/PEO/ILs/LLZO (SPE) composite solid electrolyte membrane with a weight ratio of 5% LLZO is 3.53 × 10^-4S/cm, and the working voltage window is 5.18 V. The Li⁺ migration number is 0.33. The prepared LFP/SPE/Li and NCM₆₂₂/SPE/Li solid state batteries have a discharge capacity of 165 mAh/g and 226 mAh/g at 0.1 C, respectively. Among them, the LFP/SPE/LI battery circulates 120 cycles at 0.5 C, a discharge capacity of 120 mAh/g, and a capacity retention rate of 99.8%. In addition, the impedance change is small before and after cycling, and it has excellent interfacial stability.

Key words: multilayer composite solid electrolyte membrane, glass fiber cloth, [EMIM]TFSI, ionic conductivity, solid state battery

中图分类号:

O 69

廖敏会, 杨大祥, 周洋, 万仁杰, 刘瑞平, 王强. 玻璃纤维布基多层复合固态电解质的制备及其性能[J]. 储能科学与技术, 2022, 11(10): 3090-3099.

Minhui LIAO, Daxiang YANG, Yang ZHOU, Renjie WAN, Ruiping LIU, Qiang WANG. Preparation and properties study of glass fiber cloth-based multilayer composite solid electrolyte[J]. Energy Storage Science and Technology, 2022, 11(10): 3090-3099.

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玻璃纤维布基多层复合固态电解质的制备及其性能

Preparation and properties study of glass fiber cloth-based multilayer composite solid electrolyte

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