不同横向尺寸单层Ti3C2Tx纳米片的制备及其电化学性能研究

doi:10.15541/jim20190088

无机材料学报 ›› 2020, Vol. 35 ›› Issue (1): 93-98.DOI: 10.15541/jim20190088

所属专题： MAX相和MXene材料；二维材料； 2020年能源材料论文精选(二)：超级电容器； MXene材料专辑(2020~2021)；【虚拟专辑】超级电容器(2020~2021)

不同横向尺寸单层Ti₃C₂T_x纳米片的制备及其电化学性能研究

马亚楠¹,刘宇飞¹,余晨旭¹,张传坤¹,罗时军¹(),高义华^2,³()

^1. 湖北汽车工业学院理学院, 十堰 442002
^2. 华中科技大学物理学院, 武汉 430074
^3. 华中科技大学武汉光电国家研究中心, 纳米表征与纳米器件中心, 武汉 430074

收稿日期:2019-02-28 修回日期:2019-05-07 出版日期:2020-01-20 网络出版日期:2019-07-23
作者简介:马亚楠(1988-), 女, 博士. E-mail:mayn@huat.edu.cn
基金资助:
国家自然科学基金(11904091);国家自然科学基金(11674113);湖北省自然科学基金(2019CFB260);湖北省自然科学基金(2014CFB631);湖北汽车工业学院博士基金(BK201806)

Monolayer Ti₃C₂T_x Nanosheets with Different Lateral Dimension: Preparation and Electrochemical Property

MA Ya-Nan¹,LIU Yu-Fei¹,YU Chen-Xu¹,ZHANG Chuan-Kun¹,LUO Shi-Jun¹(),GAO Yi-Hua^2,³()

^1. School of Science, Hubei University of Automotive Technology, Shiyan 442002, China
^2. School of Physics, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
^3. Center for Nanoscale Characterization & Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan 430074, China

Received:2019-02-28 Revised:2019-05-07 Published:2020-01-20 Online:2019-07-23
About author:MA Ya-Nan(1988-), female, PhD. E-mail:mayn@huat.edu.cn
Supported by:
National Natural Science Foundations of China(11904091);National Natural Science Foundations of China(11674113);Hubei Provincial Natural Science Foundation(2019CFB260);Hubei Provincial Natural Science Foundation(2014CFB631);Doctoral Research Fund of HUAT(BK201806)

摘要/Abstract

摘要：

近年来, 一种新型二维过渡金属碳化物及氮化物(MXene)凭借大的比表面积、良好的亲水性、金属导电性等物理化学性质而广受关注。通过LiF和HCl刻蚀Ti₃AlC₂的Al层, 改变机械剥离强度和方式, 以及离心速率和时间, 可控制备出平均横向尺寸为625 和2562 nm的单层Ti₃C₂T_x型MXene。借助扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线衍射仪(XRD)对二维Ti₃C₂T_x进行形貌、结构和成分的表征。使用电化学工作站表征Ti₃C₂T_x的电化学性能。结果表明: 小片层Ti₃C₂T_x(625 nm)的质量比电容高达561.9 F/g, 远高于文献报道的石墨烯、碳纳米管和二氧化锰等电极材料; Ti₃C₂T_x电极在循环测试10 ⁴次后, 其比电容仍保持初始96%的容量。

关键词: 二维材料, Ti₃C₂T_x, 可控制备, 化学刻蚀, 超级电容器

Abstract:

Recently, a new type of 2D transition metal carbides or nitrides (MXene) has attracted wide attention due to its large specific surface area, good hydrophilicity, metallic conductivity and other physical and chemical properties. 2D Ti₃C₂T_x MXene was obtained by etching Al layer of Ti₃AlC₂ with LiF and HCl and then mechanically delaminated. And the monolayer Ti₃C₂T_x nanosheets with lateral dimension of 625 and 2562 nm can be prepared by changing the intensity and way of mechanically delamination, as well as the centrifugation rate and time. Then their morphology, structure, composition, and electrochemical performance of Ti₃C₂T_x were studied. The results showed that the specific capacitance of Ti₃C₂T_x with smaller lateral size (<1 μm) can reach 561.9 F/g, higher than that of reported graphene, carbon tube and MnO₂ in the repotted literatures. And the Ti₃C₂T_x electrode still remained 96% of the initial specific capacitance after 10 ⁴ testing cycles.

Key words: 2D materials, Ti₃C₂T_x, controllable preparation, chemical etching, supercapacitor

中图分类号:

TQ174

马亚楠, 刘宇飞, 余晨旭, 张传坤, 罗时军, 高义华. 不同横向尺寸单层Ti₃C₂T_x纳米片的制备及其电化学性能研究[J]. 无机材料学报, 2020, 35(1): 93-98.

MA Ya-Nan, LIU Yu-Fei, YU Chen-Xu, ZHANG Chuan-Kun, LUO Shi-Jun, GAO Yi-Hua. Monolayer Ti₃C₂T_x Nanosheets with Different Lateral Dimension: Preparation and Electrochemical Property[J]. Journal of Inorganic Materials, 2020, 35(1): 93-98.

图/表 5

图1 Ti3C2Tx纳米片制备流程图

Fig. 1 Schematic diagram of preparation of Ti3C2Tx nanosheets

图2 (a~b)小片层和大片层Ti3C2Tx纳米片TEM照片, 插图为其对应的衍射花样图; (c)Ti3C2Tx纳米片的AFM图和高度曲线图

Fig. 2 (a-b) TEM images of smaller and larger size Ti3C2Tx nanosheets with insets showing corresponding diffraction pattern, and (c) AFM image with its height profile of Ti3C2Tx

图3 (a~b)小片和大片层Ti3C2Tx纳米片的粒径分布图; (c) Ti3AlC2和Ti3C2Tx的X射线衍射图, 黑线为Ti3AlC2, 红线为大片层Ti3C2Tx, 蓝线为小片层Ti3C2Tx; (d)大小片Ti3C2Tx的I-V曲线, 黑线为大片层Ti3C2Tx, 红线为小片层Ti3C2Tx

Fig. 3 (a-b) Diameter distribution of smaller and larger size Ti3C2Tx nanosheets; (c) XRD patterns of Ti3AlC2 and Ti3C2Tx nanosheets with black line indicating Ti3AlC2, red line indicating larger size Ti3C2Tx, and blue line indicating smaller size Ti3C2Tx; (d) I-V curves of smaller and larger size Ti3C2Tx with black line indicating larger size Ti3C2Tx and red one indicating smaller size Ti3C2Tx

图4 (a)大小片层Ti3C2Tx在20 mV/s下的CV曲线; (b)大小片层Ti3C2Tx在1 A/g下的GCD曲线图; (c)大小片层Ti3C2Tx在不同扫描速率下的质量比电容; (d)大小片层Ti3C2Tx在5 mHz到100 kHz下的电化学阻抗谱

Fig. 4 (a) CV curves of smaller and larger size Ti3C2Tx at 20 mV/s; (b) GCD curves of smaller and larger size Ti3C2Tx at 1 A/g; (c) Specific capacity of smaller and larger size Ti3C2Tx at different scanning rates; (d) EIS (Nyquist plots) for smaller and larger size Ti3C2Tx from 5 mHz to 100 kHz

图5 (a~b)小片层Ti3C2Tx的CV曲线; (c)小片层Ti3C2Tx的GCD曲线; (d)小片层Ti3C2Tx的循环稳定性

Fig. 5 (a-b) CV curves of smaller size Ti3C2Tx; (c) GCD curves of smaller size Ti3C2Tx; (d) Cyclic stability of smaller size Ti3C2Tx

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不同横向尺寸单层Ti₃C₂T_x纳米片的制备及其电化学性能研究

Monolayer Ti₃C₂T_x Nanosheets with Different Lateral Dimension: Preparation and Electrochemical Property

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