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作为离子电池的阴极预化添加剂,降低酸盐的分解潜力的高效战略

Yaqin Guo¹, Ti Yin¹, Zeyu Liu¹

¹School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, China.

Nanomaterials (Basel, Switzerland)

|August 27, 2025

概括

酸盐 (LFM) 通过降低其分解潜力,有效补充电池中的. 这一战略提高了离子电池的能量密度和循环寿命.

科学领域:

电化学
材料科学
能量储存

背景情况:

离子电池 (LIB) 对于储能至关重要,但由于固体电解质间相 (SEI) 形成,导致初始损失,从而降低了能量密度.
甲酸 (HCOOLi,LFM) 是一种具有高理论容量的潜在预化试剂,但其稳定的Li-O键导致了高反应屏障和分解潜力,限制了其使用.

研究的目的:

开发一种减少酸盐反应障碍 (LFM) 的策略,以便在离子电池中实际应用.
通过使用LFM作为预化添加剂来提高LIB的电化学性能.

主要方法:

通过协同效应将LFM分解电位从4. 84V降低到4. 23V.
使用过渡金属氧化物增强电子/离子运输动力学和催化.
嵌入LFM到带有石墨阳极和LiNi0.834Co0.11Mn0.056O2阴极的完整电池中.

主要成果:

在0.1°C (2.654.25V) 实现可逆放电容量的显著增加,从156到169 mAh·g−1.
在100个循环后,容量保留率从72.8%提高到94.7%.
证明了LFM作为商业阴极材料的高效预化添加剂的有效性.

结论:

建议的战略成功地降低了LFM的分解潜力,克服了其实际应用的局限性.
添加LFM显著提高了离子电池的电化学性能和循环稳定性.
这种方法可以有效地使用LFM作为商业阴极材料的预化添加剂.

关键词:

阴极预化电化学特性甲酸盐离子电池减少反应障碍

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