作为和离子电池的高效阳极材料的CrXY (X/Y = S,Se,Te) 单层:一项第一原则研究
Shubham Sahoo1, Puja Kumari1, Soumya Jyoti Ray1
1Department of Physics, Indian Institute of Technology Patna Bihta Bihar 801103 India ray@iitp.ac.in.
RSC advances
|February 16, 2024
概括
两维的雅努斯过渡金属二甲基化物 (TMD) 作为离子和离子电池的阳极材料具有前景. 这些材料具有出色的离子扩散和高存储能力,表明它们对先进的能量存储应用的潜力.
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
- 计算物理 计算物理
背景情况:
- 二维 (2D) 材料对于储能至关重要,特别是在具有德瓦尔斯间隙的层结构中.
- 新型阳极材料的开发对于提高离子和离子电池的性能至关重要.
研究的目的:
- 研究2D Janus过渡金属二甲基二化物 (TMDs) CrSSe,CrSTe和CrSeTe作为离子和离子电池的阳极材料的潜力.
- 用第一原则计算来评估这些2D Janus TMDs的电子特性和电化学性能.
主要方法:
- 使用密度函数理论 (DFT) 计算来探索电子特性和电化学性能.
- 分析了和离子的离子扩散路径,吸附能量和开放电路电压.
- 为研究的2D Janus TMD材料计算了理论存储容量.
主要成果:
- 离子表现出易于扩散的短扩散距离,并与单层结构强烈结合.
- 2D Janus TMD (CrSSe,CrSTe,CrSeTe) 显示了Li (0.1-0.6 eV) 和Na (0.15-0.54 eV) 原子的低扩散障碍.
- 实现了高存储容量:CrSSe (348 mAh/g用于Li,260 mAh/g用于Na),CrSTe (254 mAh/g用于Li,198 mAh/g用于Na) 和CrSeTe (208 mAh/g用于Li,177 mAh/g用于Na).
结论:
- 2D Janus TMD (CrSSe,CrSTe,CrSeTe) 是下一代离子和离子电池中高性能阳极材料的有希望的候选者.
- 计算出的低扩散障碍和高存储容量表明了出色的电化学性能.
- 这些材料为设计先进的储能解决方案提供了新的途径.
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