通过静电排斥调节来激活1 - TM频道的无序岩盐,用于增强储存
Huiqin Huang1,2, Haosheng Li1,2, Yufan Xia1
1School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
Angewandte Chemie (International ed. in English)
|November 3, 2025
概括
静电排斥调节激活了不顺序的岩盐 (DRX) 阴极中的Li+扩散. 这创造了新的途径,提高了离子电池的性能,克服了高能量密度应用的动力限制.
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
- 电池技术 电池技术
背景情况:
- 无序的岩盐 (DRX) 阴极为离子电池提供了高容量.
- 由于有限的Li+扩散通路,DRX材料面临着动力限制.
研究的目的:
- 为了激活DRX阴极中的1过渡金属 (1-TM) Li+扩散通道.
- 建立一个3D Li+扩散网络,克服动力瓶.
主要方法:
- 使用静电排斥调节来修改DRX格子结构.
- 调查四面体位置几何变化和Li+迁移能量障碍.
- 描述电化学性能,包括容量和速率能力.
主要成果:
- 1-TM通道的激活导致了四面体高度的增加和体积膨胀.
- 从1.48到0.26 eV显著降低了Li+迁移能量屏障.
- 实现了高容量 (306 mAh g-1 在10 mA g-1) 和速率能力 (~200 mAh g-1 在100 mA g-1).
结论:
- 静电排斥调节是一种有效的策略,可以增强DRX阴极中的Li+运输.
- 这种方法建立了一个连接良好的3D Li+扩散网络,解决了动力限制.
- 这些发现为先进的无序正极材料提供了设计范式.
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