在多电子阳极中打破键-菌株锁步
Shuting Sun1,2,3, Fang Chen1,2, Feike Pei4
1School of New Energy, Ningbo University of Technology, Ningbo, 315211, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|November 5, 2025
概括
研究人员通过将植入Sn4P3中间层,打破了多电子转换合金阳极中的负反循环. 这一策略提高了高容量的离子电池阳极的稳定性和动力学.
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
- 纳米技术 纳米技术
背景情况:
- 多电子转换合金阳极遭受键-应变负反循环,导致缓慢的动力学和容量衰减.
- 这些阳极中的强有力的共价键阻碍了化过程中的晶格转换,导致应变积累和键断裂.
研究的目的:
- 为了打破多电子转换合金阳极中普遍存在的键-应变负反循环.
- 提高用于储能的高容量阳极材料的稳定性和动力学.
主要方法:
- 机械化学合成用于将 (Ni) 植入锡化物 (Sn4P3) 中间层.
- 尼原子的间隙原子被用来拓定位迁徙物种并削弱Sn-P键.
主要成果:
- 植入Ni的Sn4P3 (Ni0.41Sn4P3) 阳极在0.1 A g-1.0下表现出958.9 mAh g-1的高特异容量.
- 该材料表现出优异的结构完整性和93.6%的初始库伦比效率.
- 完整电池的能量密度达到293.3 Wh kg-1.
结论:
- 间位键-应变再平衡和轨道混合带工程可以克服多电子反应中稳定性和动力学之间的权衡.
- 该策略为开发高能量密度存储系统提供了可通用的材料设计原则.
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