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在石墨烯纳米管上结合单个原子替代的素,以实现"1+1+1>3"协同增强的储存

Jian Zhao¹, Ge Gao¹, Ting Li¹

¹College of Materials Science and Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, P.R. China.

Angewandte Chemie (International ed. in English)

|August 25, 2025

概括

一种新型的阳极材料,单原子替代的SnS2与N-化石墨烯纳米管上的硫空缺 (In─SnS_2-x@NG),显著提高了离子混合电容的性能. 这种设计的阳极实现了高级能源设备的优越存储能力和速率.

科学领域:

材料科学
电化学
能量储存

背景情况:

开发先进的复合阳极对于提高离子混合电容器 (SIHC) 的电荷存储能力至关重要.
现有的阳极材料通常在容量,速率性能和循环稳定性方面面临限制.

研究的目的:

通过结合单原子替代和缺陷,为SIHC设计一种优质的阳极材料.
调查单个原子替代和硫空缺对储存性能的协同效应.

主要方法:

在N-化石墨烯纳米管上用硫空位合成单个原子替代的SnS2 (In─SnS_2-x@NG).
理论计算 (例如DFT) 和现场/现场表征以分析结构和电子特性.
在SIHC装置中对工程极进行电化学测试.

主要成果:

In─SnS_2-x@NG阳极在0.1 A g^{-1下显示出~1211.8 mAh的超高可逆容量.}
实现了优异的速率性能,其容量为417 mAhg-1在5 Ag-1上.
制造的SIHC装置具有高能量/功率密度 (278 Wh kg-1/10.0 kW kg-1) 和长周期寿命.

结论:

单个原子替代和硫空缺的协同效应显著增强储存.
In─SnS_2-x@NG阳极为设计高性能SIHC提供了一个有前途的策略.
这项研究为离子储存系统的实际应用提供了宝贵的见解.

关键词:

在单原子替代中接口粘合反应机制硫的空缺位置超高可逆储存能力

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