Mechanically compliant and cost-effective 1.4Li2O-0.75ZrCl4-0.25AlCl3 solid electrolyte for all-solid-state batteries with improved cycling stability

作者：Lv Hu, Yaolong He, Dong Wang, Wanxia Li, Jingming Yao, Xiaolong Zhang, Jinfeng Zhu, Huaican Chen, Wen Yin, Yanru Wang, Kejun Yan, Jinzhu Wang, Hui Li, Fang Chen, Y. Liu, Junqi Lai, Qi Chen, Jie Ma, Shuhong Jiao, Guorui Wang, Siqi Shi, liwei chen, Jianyu Huang, Cheng Ma · 发表于：Nature Communications · 年份：2026 · DOI：10.1038/s41467-025-68210-5 · 被引用次数：7 · 研究领域：Advanced Battery Materials and Technologies、Thermal Expansion and Ionic Conductivity、Advancements in Battery Materials

Abstract Although Li-ion conductivity has been the primary focus during decades of solid-electrolyte research, the mechanical compliance is equally important. For most state-of-the-art solid electrolytes, the mechanical compliance is characterized by the hardness above 1 GPa and Young’s modulus above 15 GPa. Here, we report a particularly compliant solid electrolyte, 1.4Li 2 O-0.75ZrCl 4 -0.25AlCl 3 , whose hardness and Young’s modulus reach 0.22 and 1.41 GPa, respectively. Meanwhile, it shows an ionic conductivity of 2.55 mS cm −1 at 25 °C and an estimated cost of $43.70 L −1 , considerably lower than that of the Li 2 ZrCl 6 solid electrolyte known for cost-effectiveness ($140.01 L −1 ). The improved mechanical compliance and fast Li-ion transport in 1.4Li 2 O-0.75ZrCl 4 -0.25AlCl 3 enable decent cell performance. With high positive electrode active material loading above 20 mg cm −2 , these two types of cells achieve areal capacities of 3.62 mAh cm −2 (85.78% capacity retention) and 3.92 mAh cm −2 (90.11% capacity retention), respectively, after 100 cycles under 0.1 C at 25 °C. The simultaneous achievement of highly competitive mechanical compliance, Li-ion conductivity, and cost-effectiveness in 1.4Li 2 O-0.75ZrCl 4 -0.25AlCl 3 have the potential to pave the way for the realization of commercial, practical all-solid-state Li batteries.