摘要：超级电容器也被称作电化学电容器，是一种新型的，性能优越的能源储存设备，在许多的领域中被广泛的应用。石墨烯作为一种具有优良的物理化学以及电学性能的二维材料，用作电化学容器的电极十分具有可行性。本文中通过多种方法制备石墨烯与二氧化钛在不同的温度反应下形成的复合材料，并将运用于电容器中电极材料的制备，通过XRD,TEM,SEM等不同测试方法，对制成的材料进行了微观结构分析，并通过循环伏安法和恒流充放电法考察了材料的电化学性能。结果表明：经过400℃加热并添加5%石墨烯相比其他温度以及未添加石墨烯的TiO2具有更好的电化学性能。48963

毕业论文关键词： 超级电容器；TiO2；石墨烯；电化学性能

Research on preparation and supercapacitor properties of grapheme composites

Abstract: The super capacitor, also known as electrochemical capacitor, is a new type of energy storage device with excellent performance, which is widely used in many fields. Graphene as a two-dimensional material with excellent physical and chemical properties and electrical properties is very feasible. This paper through prepared by various methods of graphene and TiO2 formed under different reaction temperature of composite materials, and will apply for capacitor electrode materials of production, by means of XRD, TEM and SEM, different test methods, the micro structure of material were analyzed, and by cyclic voltammetry and galvanostatic charge discharge method to investigate the electrochemical properties of the materials. The results showed that the electrochemical properties of TiO2 were better than those of the other temperature and the addition of graphene, which was heated by 400℃.

Key word：super capacitor; TiO2; Graphene; Electrochemical Performance.

目 录

1 绪论 1

1.1石墨烯概述 1

1.2石墨烯的发现 1

1.3石墨烯的性质 2

1.4石墨烯的制备方法 3

1.4.1微机械分离法 3

1.4.2沉积生长法 3

1.4.3氧化石墨还原法 3

1.4.4电化学还原法 4

1.4.5溶剂热法 4

1. 5超级电容器综述 4

1.5.1超级电容器的概述 4

1.5.2超级电容的特点 6

1.6超级电容电极材料发展研究 7

1.6.1碳电极材料 7

1.6.2金属氧化物材料 8

1.6.3导电聚合物材料 8

1.6.4复合电极材料 8

1.7选题的意义 8

2 实验材料与方法 10

2.1实验原料及实验仪器设备 10

2.2实验过程 11

2.2.1 使用Hummers法制备氧化石墨烯 11

2.2.2 链状TiO2胶体溶液的制备 12

2.2.3 TiO2-RGO混合粉体制备 12

2.2.4 泡沫镍前期处理 13

2.2.5 实验电极的制备 13

2.3 表征手段 14