Enthalpy-Driven Molecular Engineering Enables High-Performance Quasi-Solid-State Electrolytes for Long Life Lithium Metal Batteries

Enthalpy-Driven Molecular Engineering Enables High-Performance Quasi-Solid-State Electrolytes for Long Life Lithium Metal Batteries

© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - (2025) vom: 07. Apr., Seite e2419335
1. Verfasser: Wang, Zilong (VerfasserIn)
Weitere Verfasser: Shen, Longyun, Ma, Yilin, Law, Ho Mei, Xu, Shengjun, Bi, Yixin, Robson, Matthew J, Wang, Yuhao, Gröschel, André, Chen, Qing, Ciucci, Francesco
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2025
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article Li‐metal battery in situ polymerization polymerization enthalpy pouch‐type battery quasi‐solid‐state electrolyte
Beschreibung
Zusammenfassung:© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
The advancement of lithium metal batteries toward their theoretical energy density potential remains constrained by safety and performance issues inherent to liquid electrolytes. Quasi-solid-state electrolytes (QSSEs) based on poly-1,3-dioxolane (poly-DOL) represent a promising development, yet challenges in achieving satisfactory Coulombic efficiency and long-term stability have impeded their practical implementation. While lithium nitrate addition can enhance efficiency, its incorporation results in prohibitively slow polymerization rates spanning several months. In this work, high-polymerization-enthalpy 1,1,1-trifluoro-2,3-epoxypropane is introduced as a co-polymerization promoter, successfully integrating lithium nitrate into poly-DOL-based QSSEs. The resulting electrolyte demonstrates exceptional performance with 2.23 mS cm-1 of ionic conductivity at 25 °C, a Coulombic efficiency of 99.34% in Li|Cu cells, and stable lithium metal interfaces sustained through 1300 h of symmetric cell cycling. This co-polymerization approach also suppresses poly-DOL crystallization, enabling Li|LiFePO4 cells to maintain stability beyond 2000 cycles at 1C. Scale-up validation in a ≈1 Ah Li|NCM811 pouch cell achieves 94.4% capacity retention over 60 cycles. This strategy establishes a new pathway for developing high-performance, in situ polymerized quasi-solid-state batteries for practical energy storage applications
Beschreibung:Date Revised 07.04.2025
published: Print-Electronic
Citation Status Publisher
ISSN:1521-4095
DOI:10.1002/adma.202419335