基于天然辉钼矿制备的少层MoS<sub>2</sub>纳米片及其超电容性能研究

陈浩然; 齐慧强; 陈一人; 夏开胜; 李珍

doi:10.13779/j.cnki.issn1001-0076.2022.04.003

基于天然辉钼矿制备的少层MoS₂纳米片及其超电容性能研究

中国地质大学(武汉) 材料与化学学院, 湖北武汉 430074

基金项目:
国家自然科学基金面上项目（21975228）

详细信息

作者简介: 陈浩然(1998—)，男，湖南岳阳人，硕士研究生，主要从事储能材料研究。E-mail: 2910675253@qq.com; 夏开胜(1980—)，男，湖北浠水人，中国地质大学(武汉)教授、博士生导师，入选湖北省人才计划、地大学者“青年拔尖人才”计划。2005年毕业于中国地质大学(武汉)，获材料学硕士学位，2008年毕业于中国科学院上海硅酸盐研究所，获材料物理与化学博士学位，先后在华南理工大学、加拿大蒙克顿大学从事博士后研究。长期从事碳基储能材料、矿物材料的设计与应用研究，主持了国家自然科学基金面上项目、浙江省自然科学基金—青山湖联合基金项目、湖北省自然科学基金面上项目等10项，参与国家自然科学基金重点项目1项，发表SCI论文40余篇(ESI高被引论文2篇)，授权国家发明专利5件。担任湖北省线上线下混合式一流本科课程《材料物理》负责人，曾获湖北省技术发明二等奖、第五届朱训青年教师教育奖励基金

通讯作者: 夏开胜(1980—)，男，湖北浠水人，博士，教授，主要从事能源及矿物材料研究。E-mail: kaishengxia@cug.edu.cn

中图分类号: TD985;TB34;TM53

收稿日期: 2022-06-20

刊出日期: 2022-08-25

Preparation of Few-layer MoS₂ Nanosheets Based on Natural Molybdenite and Its Supercapacitor Properties

Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China

More Information

Corresponding author: XIA Kaisheng, kaishengxia@cug.edu.cn

Received Date: 20 June 2022

Publish Date: 25 August 2022

摘要

摘要:
以天然辉钼矿为原料，采用Na⁺离子辅助液相剥离法制备了一种少层的MoS₂纳米片（F-MoS₂）。分析结果表明，剥离得到的F-MoS₂纳米片厚度约为1.1~1.5 nm，对应为2~3层MoS₂。电化学性能测试发现，F-MoS₂在0.25 A/g的电流密度下质量比容量可达到73.7 F/g，远高于未剥离的辉钼矿（9.2 F/g）和商品MoS₂（19.6 F/g），F-MoS₂显著提升的电容量主要归因于其充分暴露的活性表面。本研究证实了通过Na⁺离子辅助液相剥离法制备的F-MoS₂是一类非常有应用前景的储能材料。
- 天然辉钼矿 /
- 二硫化钼 /
- 超级电容器 /
- 液相剥离
Abstract:
A few-layer of MoS₂ nanosheets (F-MoS₂) was prepared from natural molybdenite by Na⁺ ion-assisted liquid phase peeling method. The results showed that the thickness of F-MoS₂ nanosheets obtained by peeling was about 1.1-1.5 nm, the number of layers corresponding to MoS₂ was 2-3 layers. It was confirmed by electrochemical performance tests that the specific capacitance of F-MoS₂ was 73.7 F/g at a current density of 0.25 A/g, which was much higher than that of unstripped molybdenite (9.2 F/g) and commercial MoS₂ (19.6 F/g), the significantly increased capacitance of F-MoS₂ was mainly attributed to its fully exposed active surface. This research confirms that F-MoS₂ obtained through Na⁺ ion-assisted liquid phase peeling method was a very promising class of energy storage materials.
- natural molybdenite /
- molybdenum disulfide /
- supercapacitors /
- liquid phase peeling

HTML全文

图 1 MoS₂的结构^[10](a)及三种晶体构型(b)

Figure 1.

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图 2 辉钼矿制备F-MoS₂分散液流程示意图

Figure 2.

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图 3 原始辉钼矿的SEM照片

Figure 3.

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图 4 高纯辉钼矿精粉XRD谱图

Figure 4.

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图 5 F-MoS₂及原始辉钼矿的XRD对比图

Figure 5.

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图 6 F-MoS₂的SEM照片(a, b)及TEM照片(c, d)

Figure 6.

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图 7 F-MoS₂在洗涤前(a)后(b)的AFM照片

Figure 7.

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图 8 天然辉钼矿、F-MoS₂和商品MoS₂电极材料的CV曲线：5 mV/s(a)，50 mV/s(b)

Figure 8.

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图 9 (a) F-MoS₂在不同电流密度下的充放电曲线；(b) 天然辉钼矿、F-MoS₂及商品MoS₂电极在0.25 A/g下的充放电曲线；(c) 各样品的倍率性能曲线；(d) 各样品的EIS曲线

Figure 9.

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表 1 高纯辉钼矿精粉化学成分分析 /%

Table 1. Chemical composition analysis of high purity molybdenite delicate powder

成分	Mo	S	SiO₂	Fe₂O₃	MgO	CuO	Al₂O₃	Zn
含量	50.20	28.48	8.12	4.07	2.69	1.21	1.02	0.41

成分	K	Pb	Bi	Ti	Ni	As	Mn	W
含量	0.41	0.29	0.16	0.10	0.09	0.08	0.07	0.04

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