石墨烯/MnxOy的制备及其电化学性能研究

摘要石墨烯因其具有超大的比表面积和良好的导电性而广泛被用作超级电容器电极材料的基底。本论文采用水热法成功制备出石墨烯/ MnOOH复合材料和石墨烯/ MnO2-Ni(OH)2复合材料，研究了温度、时间、溶剂和负载比例对复合材料电化学性能的影响。并利用XRD、Raman、TEM对复合材料进行了结构表征。结果表明，MnOOH、MnO2、Ni(OH)2可均匀地负载在石墨烯上，其中负载物有针状和棒状两种形态。在160℃下，乙二醇为溶剂时所得石墨烯/ MnOOH复合材料的比电容最大，为171.6 F·g-1。石墨烯/ MnO2-Ni(OH)2复合材料的比电容由原来石墨烯/ MnO2的62.4 F·g-1增大到510.7 F·g-1。63925

毕业论文关键词石墨烯 MnOOH MnO2 Ni(OH)2 电化学性能超级电容器

毕业设计说明书（论文）外文摘要

Title Preparation and Electrochemical Performance of Graphene / MnxOy

Abstract Due to the huge specific surface and excellent electrical conductivity, grapheme has been widely used as a substrate of electrode materials for supercapacitor. In our work, Graphene / MnOOH and Graphene / MnO2-Ni (OH) 2 hybrids were successfully prepared through a solvothermal method. The microstructure of obtained composites were investigated by XRD, Raman and TEM, and its electrochemical properties were also studied． The results show that the particles anchoring on the grahpene sheets present rod- and needle-like morphologies.We found that reacting temperature, time and solvent have an important influence on the electrochemical properties of composite materials. Specific capacitance (Cs) of Graphene / MnOOH composite is 171.6 F·g-1 when the solvent was glycol and the reacting temperature was 160 ℃. After decorating MnO2 nanoparticles together with Ni (OH) 2 onto graphene sheets, the Cs was notably increased from 62.4 F·g-1 to 510.7 F·g-1.

Keywords: Graphene; MnOOH; MnO2; Ni (OH) 2; Electrochemical Performance; supercapacitor

1 绪论 1

1.1 超级电容器 1

1.1.1 概述 1

1.1.2 分类 2

1.1.3 电极材料 2

1.1.4 超级电容器的特点 3

1.1.5 超级电容器的应用 3

1.2 石墨烯 3

1.2.1 石墨烯概述 3

1.2.2 石墨烯的制备方法 4

1.3 锰氧化物 5

1.3.1 锰氧化物概述 5

1.3.2 锰氧化物的制备方法 5

1.4 氢氧化镍 6

1.4.1 氢氧化镍概述 6

1.4.2 氢氧化镍的制备方法 6

1.5 石墨烯基复合材料 7

2 实验部分 8

2.1 药品与仪器 8

2.1.1 药品 8

2.1.2 仪器 8

2.2 石墨烯/ MnxOy的制备及其电化学性能研究 8

2.2.1 样品制备 8

2.2.2 样品表征石墨烯/MnxOy的制备及其电化学性能研究:http://www.751com.cn/huaxue/lunwen_70789.html