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几层的MoS2纳米板垂直支在Ti3C2MXene板上,促进储存性能

Hankun Tan¹, Lei Zhang¹, Kaiyue Gao¹

¹Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China. sunli@cugb.edu.cn.

Dalton transactions (Cambridge, England : 2003)

|October 23, 2023

概括

研究人员开发了一种新的MXene@MoS₂复合材料,用于增强的离子电池阳极. 这种材料克服了导电性和体积膨胀问题,为储能应用提供了优越的容量和稳定性.

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
纳米技术纳米技术

背景情况:

2H相二硫化物 (MoS) 由于其纳米结构,稳定性和理论容量,是离子电池的一个有前途的阳极材料.
挑战包括体积膨胀导致容量衰减和由于其半导体性质而导致导电性差.

研究的目的:

为离子电池阳极设计一种复合材料,以提高MoS₂的电化学性能.
为了解决纯MoS₂的局限性,特别是容量损失和电导率不足.

主要方法:

使用CTAB对MXene表面进行修改,以增强MoO₄^2-离子吸附.
几层2H-MoS₂的垂直生长到MXene板上.
作为电池阳极的MXene@MoS₂复合材料的制造和电化学测试.

主要成果:

该MXene@MoS₂复合材料表现出极好的储存性能.
在200mAg-1的100个循环后,可逆的1198mAhg-1的特定容量得到维持.
即使在8000 mA hg-1的高速率下,也可以达到717 mA hg-1的高特异性容量.

结论:

导电性MXene基板和垂直对齐的MoS₂有效地提高导电性并减轻体积膨胀.
MXene@MoS₂复合材料表现出离子电池的优越的特定容量,循环稳定性和速率能力.

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