Boosting wide-temperature solid-state lithium metal batteries by polyether-carbonate hybridization.

作者：Jia Chou, Shengbo Yang, Cheng-Yan Zhuo, Zhixing Wang, Huajun Guo, Xinhai Li, Guochun Yan, Guangchao Li, W. Peng, Zhenghui Liu, Jiexi Wang, Hui Duan · 发表于：Materials Horizons · 年份：2026 · DOI：10.1039/d5mh02486b · 被引用次数：1 · 研究领域：Medicine

The development of temperature-resilient solid-state lithium metal batteries is hindered by multiple interrelated factors, including the intrinsically low ionic conductivity of solid-state electrolytes, the propensity for lithium dendrite formation due to non-uniform Li+ flux distribution, and interfacial degradation mechanisms that collectively deteriorate electrochemical performance and raise safety concerns at elevated or sub-ambient temperatures. Herein, a polyether-co-carbonate solid polymer electrolyte (PDPC) adaptable for a wide temperature range has been developed through an electronic cloud modulation strategy. The synergistic combination of electron-donating ether groups and electron-withdrawing carbonate groups in PDPC effectively regulates the coordination structure and transport characteristics to optimize ionic transport and interfacial stability. The resulting electrolyte, composed of poly(1,3-dioxolane), poly(propylene carbonate), and poly(vinylene carbonate) segments, exhibits a high ionic conductivity of 1.8 × 10-4 S cm-1 at 25 °C, a low activation energy of 0.16 eV, an expanded electrochemical stability window of 4.5 V vs. Li+/Li, and an improved Li+ transference number of 0.84. Owing to these outstanding properties, the PDPC-based lithium-metal batteries overcome the challenges in both low- and high-temperature operation, delivering superior electrochemical performance and high Coulombic efficiency across a wide temperature range (-10 to 60 °C).