Qiao Qiao, Xiong Xiao-Song, Ni Xiao-Qin, Fu Li-Jun, Ren Xiao-Ming, van Ree Teunis, Wu Yu-Ping
College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
School of Energy Science and Engineering, Nanjing Tech University, Nanjing 211816, China.
ACS Appl Mater Interfaces. 2024 Oct 2. doi: 10.1021/acsami.4c10534.
Solid-state electrolytes (SSEs) have garnered significant attention as critical materials for enabling safer, energy-dense, and reversible electrochemical energy storage in batteries. Among the various types of solid electrolytes developed, composite polymer electrolytes (CPEs) have stood out as some of the most promising candidates due to their well-rounded performance. In this study, we choose polyethylene glycol (PEG) as the covalent grafting intercalant and lithium perchlorate as carrier source to prepare a fast lithium ion conductor, K-PEG-Li doped with clay-based active filler as a CPE. The CPE exhibits excellent lithium conduction (4.36 × 10 S cm at 25 °C and 3.32 × 10 S cm at 115 °C), great mechanical performance with good tensile strength (6.07 MPa) and toughness (strain 313%), and convincing flame-retardancy. These outstanding conducting and mechanical functionalities indicate that such a clay-based active filler doped composite polymer electrolyte will find promising application in solid-state lithium batteries.
固态电解质（SSEs）作为实现电池更安全、能量密度更高和可逆电化学储能的关键材料，已引起广泛关注。在已开发的各种类型的固体电解质中，复合聚合物电解质（CPEs）因其全面的性能脱颖而出，成为最有前途的候选材料之一。在本研究中，我们选择聚乙二醇（PEG）作为共价接枝插层剂，高氯酸锂作为载流子源，制备了一种快速锂离子导体，即掺杂粘土基活性填料的K-PEG-Li作为复合聚合物电解质。该复合聚合物电解质表现出优异的锂传导性（25℃时为4.36×10 S cm，115℃时为3.32×10 S cm）、良好的机械性能，具有良好的拉伸强度（6.07 MPa）和韧性（应变313%）以及令人信服的阻燃性。这些出色的导电和机械功能表明，这种掺杂粘土基活性填料的复合聚合物电解质在固态锂电池中将有广阔的应用前景。
