Shi Xiaojuan, Zhang Hui, Hu Hongjiu
Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Mechanics in Energy Engineering, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, China.
Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Frontier Science Center of Mechanoinformatics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, China.
Polymers (Basel). 2025 Jul 21;17(14):1991. doi: 10.3390/polym17141991.
Traditional covalently cross-linked solid-state electrolytes exhibit desirable mechanical durability but suffer from limited processability and recyclability due to their permanent network structures. Incorporating dynamic covalent bonds offers a promising solution to these challenges. In this study, we report a reprocessable and recyclable polymer electrolyte based on a dynamic ester bond network, synthesized from commercially available materials. Polyethylene glycol diglycidyl ether (PEGDE) and glutaric anhydride (GA) were cross-linked and cured in the presence of benzyl dimethylamine (BDMA), forming an ester-rich polymer backbone. Subsequently, 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) was introduced as a transesterification catalyst to facilitate network rearrangement. Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) was incorporated to establish efficient ion transport pathways. By tuning the cross-linking density and catalyst ratio, the electrolyte achieved an ionic conductivity of 1.89 × 10 S/cm at room temperature along with excellent reprocessability.
传统的共价交联固态电解质具有理想的机械耐久性，但由于其永久性网络结构，加工性和可回收性有限。引入动态共价键为应对这些挑战提供了一个有前景的解决方案。在本研究中，我们报道了一种基于动态酯键网络的可再加工和可回收的聚合物电解质，它由市售材料合成。聚乙二醇二缩水甘油醚（PEGDE）和戊二酸酐（GA）在苄基二甲基胺（BDMA）存在下交联并固化，形成富含酯的聚合物主链。随后，引入1,5,7-三氮杂双环[4.4.0]癸-5-烯（TBD）作为酯交换催化剂以促进网络重排。掺入双（三氟甲磺酰）亚胺锂（LiTFSI）以建立有效的离子传输途径。通过调整交联密度和催化剂比例，该电解质在室温下实现了1.89×10 S/cm的离子电导率以及优异的再加工性。
