摘要金属硫化物由于其结构独特,因而具有许多优异的性质,在锂离子电池、超级电容器、传感器等诸多领域显示出广泛的应用前景。石墨深层氧化后的氧化石墨(GO)具有准二文层状结构,层面上含有许多—OH、—COOH、—C=O、环氧等极性基团。将氧化石墨与金属硫化物复合,可显示出两者之间的协同效应,不仅解决了金属硫化物团聚的问题,而且可以得到分散性好,比表面积大的复合材料。这种新型复合材料作为超级电容电极具有高的比电容。26407
本文首先以水为溶剂,尝试通过油浴回流与水热相结合的方法制备石墨烯负载硫化铁镍(NiFeS4),但实验并没有成功,未能制得NiFeS4。但我们还是对制得的样品进行了测试,并考察了铁镍比例对复合材料形貌和电化学性能的影响。实验表明加入的硝酸镍与硝酸铁的摩尔比为1:2,水为溶剂,先在95℃下油浴回流10h,再180℃水热反应20h获得的样品性能最好。
关键词:氧化石墨烯,硫化铁镍,电化学性能,复合材料,水热法
毕业设计说明书(毕业论文)外文摘要
Title Synthesis and electrochemical performance of graphene-sulfide
Abstract
Nanostructual Metal sulfide has many excellent properties due to its unique structure,and it shows the broad application in the lithium ion battery, supercapacitor, sensor, and many other areas.After a deep oxidation, graphite oxide (GO) has a 2-layer structure, with many - OH, - COOH, C = O, epoxy and other functional groups on its surface.In order to show the synergies between the two,we compound graphite oxide with metal sulfide .This new kind of composite material has high specific capacitance as super capacitor electrode material .
In this work,we try preparing composite of GO decorated with NiFeS4 via a method combined distillation with hydrothermal synthetic method using water as the solvent.However,The experiment did not succeed.We analyzed the reasons for the failure of the experiment.We also studied the elctrochemical properties of the samples with cyclic voltammetris,electrochemical impedance spectroscopy.We investigate the effects of nickel iron percentage on the samples’ structure and electrochemical properties.It showed that when nickel iron percentage is 1:2,the samples have the best performance.
Key words supercapacitor,graphene oxide,nanocomosites,electrochemistry
目录
1 绪论 1
1.1超级电容器概述 1
1.1.1超级电容器的定义及其特点 1
1.1.2超级电容器的结构 2
1.1.3超级电容器的工作原理 4
1.1.4超级电容器的主要能指标 5
1.1.5超级电容器的产业化现状及市场前景 5
1.2石墨烯概述 6
1.2.1石墨烯的性能 6
1.2.2石墨烯的制备方法 8
1.2.3石墨烯在超级电容器中的应用 9
1.3金属硫化物概述 9
2 本课题研究的目的和意义 10
3 实验 11
3.1实验原料及试剂 11
3.2实验仪器与设备 11
3.3实验原理与方案 11
3.4样品的制备 12
3.5样品的表征 13
3.6样品的电化学测试 15
结论 22
致 谢 22
参考文献 26
1 绪论
21世纪以来,能源问题与环境问题已成为全球关注的热点问题。能源短缺,环境污染日益严重,迫切要求开发利用各种可持续清洁能源。 石墨烯-硫化物复合纳米材料的制备及性能研究:http://www.youerw.com/huaxue/lunwen_20588.html