对于全固态电池而言,一种高导电性圆柱体阴极
Julian F Baumgärtner1,2, Daniel Isler1,2, Hung Quoc Nguyen3
1Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland.
ACS energy letters
|November 20, 2025
概括
与铁基Li2-xFeCl4 (LFC) 一样,旋为高功率的离子电池提供了优越的导电性. 这项研究突出了LFC的重点.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 高功率的离子电池 (LIB) 需要具有出色的离子和电子导电性的正极活性材料 (CAM).
- 氧脊柱是常用的CAM,但在运输特性方面存在局限性.
- 需要先进的CAM,利用地球上丰富的元素.
研究的目的:
- 为了研究haloospinels作为一个新的类型的CAMs为LIBs.
- 为了证明基于铁的旋对提高电池性能的潜力.
- 探索使用Li2-xFeCl4 (LFC) 作为全固态电池 (ASSB) 中的模型CAM.
主要方法:
- 合成和描述旋转型Li2-xFeCl4 (LFC) 的情况.
- 使用微米大小的LFC粒子制造阴极.
- 在完全固态电池配置中对LFC进行电化学测试.
- 对LFC的离子和电子导电性的评估.
主要成果:
- 相比于oxospinels,Halospinels具有显著增强的离子和电子传输特性.
- 液晶电流表现出高离子-电子导电性,使其能够有效地传输离子和电子.
- 用微米大小的LFC颗粒制造的阴极在实际电流密度 (0.5 mA cm-2) 中实现了高面积容量 (>2 mA h cm-2).
- 对于基于LFC的ASSB,观察到超过200个周期的稳定循环性能.
结论:
- Li2-xFeCl4 (LFC) 是高性能LIBs的一个有前途的阴极活性材料.
- 旋为传统的氧旋提供了一种可行的替代方案,使得地球上丰富的金属如铁的使用成为可能.
- 这些发现为具有成本效益和高性能全固态电池铺平了道路.
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