镍钴氢氧化物复合材料的制备及电化学性能研究

摘要镍钴氢氧化物复合材料由于具有独特的微观结构，特殊的物理性能，低廉的制备成本，在电化学，能量储存及传感领域具有广阔的前景。本实验设计利用Ni(NO3)2•6H2O和Co(NO3)2•6H2O为原料，以丙三醇和水作为混合溶剂，乌洛托品为缓释性碱源，按照镍钴不同的比例，通过化学共沉淀法制备镍钴氢氧化物复合材料，利用X射线衍射，扫描电子显微镜，透射电子显微镜和电化学工作站等手段对产物进行结构及性能的表征。结果表明，在镍钴比为1:1时材料的性能最佳，为均匀舒展的薄片，材料在电流密度为1 A∙g-1，2 A∙g-1，5 A∙g-1，10 A∙g-1，15 A∙g-1，20 A∙g-1的条件下比电容为839。27 F∙g-1，794。56 F∙g-1，709。03 F∙g-1，631。37 F∙g-1，572。60 F∙g-1，523。94 F∙g-1,材料性能优异，有望成为优良的电极材料。72528

由于Co3O4的比容量高，性能优异，是一种潜在的优秀负极材料。本文利用a-Co(OH)2为原料，采用煅烧的方法制备Co3O4纳米材料，利用X射线衍射及电化学工作站等手段对产物进行性能表征。结果表明经煅烧得到的Co3O4是非常纯的结晶物，首次充电容量为1180 mAh∙g-1，经15次循环后仍能保持780 mAh∙g-1的可逆性容量，材料具有很高的比容量，但可逆性不好，需要进一步改进。

毕业论文关键词钴镍氢氧化物复合材料超级电容器电池 Co3O4

毕业设计说明书外文摘要

Title Preparation and electrochemical properties of nickel/cobalt hydroxide compound materials

Abstract Nickel/cobalt hydroxide compound materials have a broad prospect in the field of electrochemistry, energy storage and sensing because of their unique microstructure, special physical properties and the low cost。 This thesis uses Ni(NO3)2•6H2O and Co(NO3)2•6H2O as raw material, with glyceryl alcohol and water as mixed solvent, methenamine as slow-releasing potential alkali source。 According to the different ratio of nickel and cobalt, we adopt the method of Chemical deposition to make nickel/cobalt hydroxide compound materials。 By X-ray diffraction, SEM, TEM and electrochemical workstation, we can make the performance analysis。 The study shows that nickel/cobalt hydroxide compound materials with nickel and cobalt in the ratio of 1: 1 have very good performance。 Materials are thin sheets of uniform stretch。 When the materials in current density for 1 A∙g-1, 2 A∙g-1, 5 A∙g-1, 10 A∙g-1, 15 A∙g-1, 20 A∙g-1conditions their specific capacitance is 839。27 F∙g-1, 794。56 F∙g-1, 709。03 F∙g-1, 631。37 F∙g-1, 572。60 F∙g-1, 523。94 F∙g-1。 By their excellent performance, nickel/cobalt hydroxide compound materials are expected to become good electrode materials。

Due to the high capacity density and good performance of Co3O4, it is a kind of potential excellent negative electrode material。 Using a-Co(OH)2 as raw materials, Co3O4 nanometer materials were prepared by calcination method。 The properties of the products were characterized by X - ray diffraction and electrochemical workstation。 Results show that the Co3O4 obtained by calcination is a very pure crystal。 The first charge capacity is 1180 mAh∙g-1。 After 15 cycles it can still maintain a reversible capacity of 780 mAh∙g-1。 The material shows high specific capacity, but the reversibility is not excellent。 We need further improvement。

Keywords Nickel/cobalt hydroxide compound materials Supercapacitor Battery Co3O4

1 引言 1

1。1 超级电容器的分类 1

1。2 超级电容器的工作原理镍钴氢氧化物复合材料的制备及电化学性能研究:http://www.youerw.com/cailiao/lunwen_83910.html