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在VS₂中,对形态优化和介层扩张的双重策略,向高性能Mg-Li混合离子电池的阴极

Xu Zhang^1,2, Jiangchuan Liu^1,2, Yana Liu^1,2

¹College of Materials Science and Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P.R. China.

ACS applied materials & interfaces

|July 3, 2024

概括

研究人员为Mg-Li混合离子电池 (MLIB) 开发了先进的阴极材料. 层次的花样VS2涂有N-doped碳增强能量密度和稳定性,以更好地储存能量.

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
储能储能储能储能储能储能

背景情况:

-混合离子电池 (MLIBs) 提供了储能潜力,原因是没有树突的阳极和快速的离子动力学.
由于缺乏合适的阴极材料,MLIBs的实际应用受到阻碍.

研究的目的:

为MLIBs开发先进的阴极材料.
通过材料设计,提高MLIB的能量密度和速度能力.

主要方法:

构建了层次的花样VS2架构,覆盖了N-doped无形碳层.
利用了形态优化和层间扩张的双重策略.
雇佣了电化学测试和理论计算.
进行了系统的现场表征,以揭示离子储存机制.

主要成果:

层次VS2阴极在1.2V的平均电压下表现出644.4Wh kg-1的优异的特定能量密度,而Mg2+/Mg则为1.2V.
在2000 mA g-1下实现了优异的速率能力,容量为181.1 mAh g-1.
证明Li+储存是MLIBs容量的主要贡献者.
由于定制的架构和碳涂层,增强了结构稳定性和体积变化的缓冲.

结论:

开发的等级花样VS2阴极显著提高了MLIB的性能.
形态优化和层间扩张的策略对于设计高性能MLIB阴极是有效的.
这项工作为构建具有高能量密度和优异速率性能的MLIB提供了洞察力.

关键词:

含有N-的碳.能量密度能量密度层次结构的建筑架构.层间扩张层间扩张理论上的计算,理论上的计算.

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