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在酸负电极中排列空位的矿超晶格,用于增强的离子存储

Xuhui Xiong¹, Zhengwang Liu¹, Ruixuan Zhang²

¹Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, State Key Laboratory of Coatings for Advanced Equipment, College of Smart Materials and Future Energy, Fudan University, Shanghai, China.

Nature communications

|December 12, 2025

概括

有订单空缺的工程矿Ce2 / 3TiO3为离子电池中石墨和Li4Ti5O12提供了高性能替代品,显示出出色的容量,快速充电和长期稳定性.

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
固态化学固态化学

背景情况:

离子电池中的石墨和Li4Ti5O12等商业负电极在安全性,能量密度,速率性能和循环稳定性方面存在权衡.
开发先进的负电极材料对于下一代储能解决方案至关重要.

研究的目的:

通过引入结构订单和空位工程来设计具有增强电化学性能的矿负极,Ce2 / 3TiO3.
通过新型材料设计,克服当前商业负电极材料的局限性.

主要方法:

合成了微米大小的Ce2/3TiO3与高度排序的Ce空缺,形成了一个稳定的超级网格.
研究的电化学性能,包括特定容量,运行潜力,速率能力和循环稳定性.
利用现场结构分析和原子尺度成像来了解底层机制.

主要成果:

在最佳运行潜力下 (~0.8V与Li+/Li) 实现高特异性容量 (>200mAhg-1).
证明了高达50°C的快速充电能力和稳定的循环性能,在20°C时超过10,000个循环.
观察到可逆的拓相变,使+扩散,同时保持晶格完整性.

结论:

在Ce2/3TiO3中订购空位为离子电池设计高性能负电极提供了可行的策略.
工程矿材料显示出超越石墨和Li4Ti5O12的性能限制的潜力.
这项工作强调了结构和空缺工程在推进电池电极材料方面的重要性.

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