Modulation of Ti3C2Tx interlayer spacing and functional groups by Lewis-basic halides and their effects on Li+ storage properties

EcoEnergy Pub Date : 2024-12-15 DOI:10.1002/ece2.88

Xuke Li, Keke Guan, Lixiang Ding, Xinyue Wang, Haijun Zhang, Yaping Deng, Wen Lei

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Abstract

Surface and interfacial chemistry play a vital role in shaping the properties of two-dimensional transition metal carbides and nitrides (MXenes). This study focuses on utilizing Lewis-basic halides (LiCl/KCl) for thermal treatment of multilayered Ti₃C₂T_x, leading to the simultaneous modulation of interlayer spacing and surface functional groups. Compared to the pristine Ti₃C₂T_x, the LiCl/KCl treated sample (heating temperature: 450°C, denoted as LK-Ti₃C₂T_x-450) showcases a remarkable increase in the interlayer spacing and synergistic optimization of the functional groups. These modifications endow LK-Ti₃C₂T_x-450 with enhanced electrochemical properties, rendering it as a promising anode candidate for lithium-ion batteries. The increased interlayer spacing is particularly advantageous, as it facilitates efficient and rapid Li⁺ diffusion, a vital factor in enhancing the performance of energy storage devices.

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路易斯碱卤化物对Ti3C2Tx层间距和官能团的调制及其对Li+存储性能的影响

表面和界面化学在形成二维过渡金属碳化物和氮化物（MXenes）的性质中起着至关重要的作用。本研究的重点是利用刘易斯碱卤化物（LiCl/KCl）对多层Ti3C2Tx进行热处理，导致层间距和表面官能团的同步调制。与原始Ti3C2Tx相比，LiCl/KCl处理后的样品（加热温度为450℃，标记为LK-Ti3C2Tx-450）层间距显著增加，官能团协同优化。这些修饰使LK-Ti3C2Tx-450具有增强的电化学性能，使其成为锂离子电池极具前景的阳极候选材料。层间距的增加是特别有利的，因为它促进了Li+的高效和快速扩散，这是提高储能设备性能的重要因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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EcoEnergy

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