Rational Design of a Cross-Linked Composite Solid Electrolyte for Li-Metal Batteries

• DOI: 10.1021/acsami.3c15456
• Publication Date: 2023-12-22T19:36:47Z
• Authors: Changhao Tian; Mengyuan Song; Jiantao Tang; Haoyang Yuan; Chao Ai; Huajun Cao; Tao Huang; Aishui Yu
• Keywords: Rational design; Lithium metal

The interfacial problem caused by solid–solid contact is an important issue faced a solid-state electrolyte (SSE). Herein, cross-linked composite solid (CSE) poly(vinylene carbonate) (PVCA)─ethoxylated trimethylolpropane triacrylate (ETPTA)─Li1.5Al0.5Ge1.5(PO4)3 (LAGP) (PEL) prepared in situ thermal polymerization. ionic conductivity and Li+ transference number (tLi+) of PEL increase significantly due to the addition LAGP, which can reach 1.011 × 10–4 S cm–1 0.451 respectively. electrochemical stable window also widened 4.68 V. Benefiting from integrated structure, assembled coin cell shows low resistance. all-solid-state NCM622|PEL|Li exhibits initial discharge capacity 169.7 mA h g–1 70% retention over 100 cycles at 0.2 C, demonstrating excellent cycling stability.