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超快速合成高的MAX阶段及其衍生MXenes用于电池电极

Liang Zhang¹, Huicong Li¹, Xiaoyu Zhang²

¹School of Mathematics and Physics Institution, University of Science and Technology Beijing, Beijing, 100083, China.

Angewandte Chemie (International ed. in English)

|November 11, 2024

概括

这项研究介绍了一种超快的火花等离子体烧结方法,以创建高的MAX相和MXenes用于储能. 新型TiVNbMoC3 MXene电极显示出出色的离子电池性能.

科学领域:

材料科学材料科学材料科学
储能储能储能储能储能储能
纳米技术纳米技术

背景情况:

高材料为储能提供了独特的性能,但面临着相分离和长时间烧结等合成挑战.
MAX相及其二维衍生物MXenes对于电化学储能应用具有前景.

研究的目的:

为高 MAX 阶段及其相应的 MXenes 开发一种超快速合成策略.
研究新型高的MXenes的结构特征和储能潜力.

主要方法:

利用火花等离子烧结 (SPS) 在15分钟内超快速合成高MAX相.
运用理论计算来理解高度MAX相位形成的热力学.
描述了MAX相的原子结构及其转化为MXenes.

主要成果:

成功合成了高纯度 (高达99.54%) 高的MAX相,包括一个新的 (Ti0.2V0.2Cr0.2Nb0.2Mo0.2) 4AlC3相.
观察到MAX阶段的多种堆叠模式以及原子层上的MXenes的拓变换.
TiVNbMoC3 MXene电极表现出优越的离子存储容量 (725mAhg-1在1Ag-1的1000个循环后).

结论:

拟议的SPS方法能够快速合成高度MAX相,克服典型的合成障碍.
高的MXenes显示出作为可充电电池的先进电极材料的巨大潜力.
这项工作为在能源领域应用高的MXenes铺平了道路.

关键词:

高的MAX阶段的高.高的MXenesenes具有很高的.离子电池是一种离子电池.离子电池离子电池超快速合成的方法

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