宁波东方理工大学孙学良团队近日研究了用于全固态电池的高性价比一体化卤化物材料。相关论文于2025年6月25日发表在《自然》杂志上。

所有固态电池都需要先进的阴极设计，以实现其高能量密度和经济可行性的潜力。集成一体式阴极消除了非活性导电添加剂和异质界面，有望获得可观的能量和稳定性，但受到缺乏足够Li⁺/e⁻电导率、机械坚固性和结构稳定性的材料的阻碍。研究组介绍了Li_1.3Fe_1.2Cl₄，这是一种克服这些挑战的具有成本效益的卤化物材料。利用可逆的Fe²⁺/Fe³⁺氧化还原和Li⁺/e⁻在其框架内的快速传输，Li_1.3Fe_1.2Cl₄实现了与Li⁺/Li相比529.3 Wh kg⁻¹的电极能量密度。

至关重要的是，Li_1.3Fe_1.2Cl₄在循环过程中表现出独特的动态特性，包括可逆的局部铁迁移和赋予自愈行为的脆韧转变。这实现了卓越的循环稳定性，在5℃的速率下保持了3000次循环的90%容量保持率。Li_1.3Fe_1.2Cl₄与富镍层状氧化物的集成进一步将能量密度提高到725.6 Wh kg⁻¹。通过利用一体化卤化物的有利动态机械和扩散特性，这项工作将一体化卤化物确立为下一代全固态电池中能量密集、耐用阴极的途径。

附：英文原文

Title: A cost-effective all-in-one halide material for all-solid-state batteries

Author: Fu, Jiamin, Wang, Changhong, Wang, Shuo, Reid, Joel W., Liang, Jianwen, Luo, Jing, Kim, Jung Tae, Zhao, Yang, Yang, Xiaofei, Zhao, Feipeng, Li, Weihan, Fu, Bolin, Lin, Xiaoting, Hu, Yang, Su, Han, Hao, Xiaoge, Gao, Yingjie, Zhang, Shutao, Wang, Ziqing, Liu, Jue, Abdolvand, Hamid, Sham, Tsun-Kong, Mo, Yifei, Sun, Xueliang

Issue&Volume: 2025-06-25

Abstract: All-solid-state batteries require advanced cathode designs to realize their potential for high energy density and economic viability1,2,3. Integrated all-in-one cathodes, which eliminate inactive conductive additives and heterogeneous interfaces, hold promise for substantial energy and stability gains but are hindered by materials lacking sufficient Li+/e conductivity, mechanical robustness and structural stability4,5,6,7,8,9,10,11,12,13,14. Here we present Li1.3Fe1.2Cl4, a cost-effective halide material that overcomes these challenges. Leveraging reversible Fe2+/Fe3+ redox and rapid Li+/e transport within its framework, Li1.3Fe1.2Cl4 achieves an electrode energy density of 529.3Whkg1 versus Li+/Li. Critically, Li1.3Fe1.2Cl4 shows unique dynamic properties during cycling, including reversible local Fe migration and a brittle-to-ductile transition that confers self-healing behaviour. This enables exceptional cycling stability, maintaining 90% capacity retention for 3,000 cycles at a rate of 5 C. Integration of Li1.3Fe1.2Cl4 with a nickel-rich layered oxide further increases the energy density to 725.6Whkg1. By harnessing the advantageous dynamic mechanical and diffusion properties of all-in-one halides, this work establishes all-in-one halides as an avenue for energy-dense, durable cathodes in next-generation all-solid-state batteries.

DOI: 10.1038/s41586-025-09153-1

Source: https://www.nature.com/articles/s41586-025-09153-1