[1]管斌,刘鹏成,林紫锋.热处理对Ti3C2Tx MXene材料电化学储锂性能的影响[J].中国材料进展,2023,42(05):369-374.[doi:10.7502/j.issn.1674-3962.202208020]
　GUAN Bin,LIU Pengcheng,LIN Zifeng.Influence of Heat Treatment on Electrochemical Lithium Storage Properties of Ti3C2Tx MXene[J].MATERIALS CHINA,2023,42(05):369-374.[doi:10.7502/j.issn.1674-3962.202208020]
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热处理对Ti3C2Tx MXene材料电化学储锂性能的影响()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
42
期数:
2023年第05期
页码:
369-374
栏目:
出版日期:
2023-05-30

文章信息/Info

Title:
Influence of Heat Treatment on Electrochemical Lithium Storage Properties of Ti3C2Tx MXene
文章编号:
1674-3962(2023)05-0369-06
作者:
管斌; 刘鹏成; 林紫锋
四川大学材料科学与工程学院，四川 成都 610065
Author(s):
GUAN Bin;  LIU Pengcheng;  LIN Zifeng
College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China
关键词:
热处理; MXene; 熔盐法制备; 官能团调控; 电化学储锂
Keywords:
heat treatment;  MXene;  molten salt synthesis;  functional group modulation;  electrochemical lithium storage
分类号:
TM912
DOI:
10.7502/j.issn.1674-3962.202208020
文献标志码:
A
摘要:
MXene材料是一类二维过渡金属碳化物、氮化物或碳氮化合物，在能源、光学、生物、传感和电磁屏蔽等领域具有重要应用前景。近期研究表明，路易斯酸熔融盐法刻蚀制得的二维MXene材料具有优异的电化学储锂性能，且表面官能团对其储锂性能具有较大影响。为此，系统研究了热处理对Ti3C2Tx MXene（T为Br及O）官能团及电化学储锂性能的影响。分析了不同热处理温度下Ti3C2Tx MXene的结构稳定性及官能团脱附行为，并对比了不同温度处理下Ti3C2Tx MXene的电化学性能，阐明了不同官能团在储锂过程的作用。研究结果表明，热处理可让Br官能团发生脱附及产生TiO2，从而提升MXene材料的储锂性能；热处理温度大于300 ℃时，Ti3C2Tx MXene表面O官能团发生原位氧化，生成TiO2并贡献额外储锂容量，但热处理温度为900 ℃时，Ti3C2Tx MXene结构被破坏，储锂容量大幅降低。在700 ℃热处理Ti3C2Tx MXene样品可获得最高储锂容量，达241.9 mAh·g-1，相较未热处理样品容量提升32.2%。
Abstract:
MXene materials are a class of two-dimensional transition metal carbides, nitrides or carbon-nitrogen compounds with important application prospects in the fields of energy, optics, biology, sensing, and electromagnetic shielding. Recently, studies have shown that two-dimensional MXene materials prepared by Lewis acid molten salt etching have excellent electrochemical lithium-storage performance, and surface functional groups have a great influence on lithium storage performance. Therefore, this paper systematically studies the effect of heat treatment on the functional group of Ti3C2Tx (T is Br, O functional group) and the electrochemical lithium storage performance. The structural stability and functional group desorption behavior of Ti3C2Tx MXene at different heat treatment temperatures are analyzed, and the electrochemical properties of MXene treated at different temperatures are compared to clarify the role of different functional groups in the lithium storage process. The research results show that heat treatment can desorb the Br functional group, thereby improving the lithium storage performance; when the heat treatment temperature is greater than 300 ℃, the O functional group on the surface may react with Ti3C2Tx MXene to generate TiO2 and contribute additional lithium storage capacity, but when the heat treatment temperature is 900 ℃, the structure of Ti3C2Tx MXene is destroyed, and the lithium storage capacity is greatly reduced. Therefore, heattreating the Ti3C2Tx MXene sample at 700 ℃ can obtain the highest lithium storage capacity, reaching 241.9 mAh·g-1, which is a 32.2% increase in capacity compared with the untreated Ti3C2Tx MXene.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2022-08-16　　修回日期: 2022-10-19 基金项目: 国家自然科学基金资助项目(52072252, 51902215)
更新日期/Last Update: 2023-05-06