Fabrication of Elastic Cyclodextrin-Based Triblock Polymer Electrolytes for All-Solid-State Lithium Metal Batteries

• DOI: 10.1021/acsaem.1c01625
• Publication Date: 2021-08-20T16:14:52Z
• Authors: Cai Zuo; Hongping Li; Gong Chen; Jun Yang; Zhixin Xu; Zhigang Xue
• Keywords: 01 natural sciences; 0104 chemical sciences

Lithium metal batteries with liquid electrolytes usually suffer from the growth of lithium dendrites and safety issues such as leaking volatilization. Solid polymer (SPEs) can relieve these problems due to their chemical electrochemistry stability. However, PEO-based SPEs are still too brittle endure bending, stretching, shearing. Herein, highly elastic cyclodextrin-based triblock (CDTPEs) were fabricated via ring-opening polymerization initiator-free thiol–ene reaction. The rubbery PTMC segment endows CDTPEs excellent elasticity complicated conditions. This CDTPE integrates an elongation (580%) favorable ionic conductivity (1.5 × 10–3 S cm–1 at 100 °C). More importantly, stable stripping/plating process for over 2200 h was achieved uniform electrodeposition. cyclodextrin component is verified be beneficial LiFePO4/CDTPE/Li cells exhibit cycling performance reversible specific discharge capacity. Our work may provide a method stabilizing batteries.