钴酸镍电极材料电化学性能的研究

摘要：对电化学电容器工作机理的理解的不断加深，使得人们开始尝试寻找廉价而又具有相对较高比电容量的电极材料。其中钴和镍的氧化物作为一种赝电容材料因为较优的性能而开始受到了关注。而对它们的复合氧化物钴酸镍的研究依然处于起步阶段有待进一步发展。本文研究了两个水热体系中不同制备条件下制备的钴酸镍产物的电化学性能，结合XRD、SEM 等测试结果对影响因素进行了探讨。研究结果表明：在以 HMT 为结构导向剂的水热体系中，热处理温度和保温时间对产物的比电容有很大影响，获得纳米片自组装形成纳米花状产物后，经过 250 ℃热处理保温 1hr 后得到的钴酸镍有较高的比电容，在0.5A/g的电流密度下比电容为828F/g，并且有较好的倍率性能；其次，在以NH4F为结构导向剂的水热体系中，400 ℃热处理温度获得的钴酸镍的比电容比 450 ℃时获得的产物高。36052
毕业论文关键词：钴酸镍；电极材料；水热法；电化学性能；超级电容器
The Research on Electrochemical Properties of Nickel Cobalt Electrode Materials
Abstract：With the improved understanding of the working mechanism of electrochemical capacitors, people start to look for inexpensive electrode materials that have relatively high specific capacitance. Interests aroused as cobalt and nickel oxide shows well electrochemical properties. While research on cobalt nickel composite oxide is still in its infancy for further development. Researches on cobalt nickel composite oxide (NiCo2O4) with different shapes have been done on this article. These products were prepared in two different hydrothermal systems with different reaction conditions. The result has shown that sintering temperature and holding time plays an important role in hydrothermal system which adds HMT as the structure-directing agent. After nanoplates self-assembled into nanoflowers, NiCo2O4 that kept under 250℃ for an hour showed higher specific capacitance (828F/g under current density of 0.5A/g ) and has well rate performance. Meanwhile, In NH4F system NiCo2O4 sintering under 400℃ has higher specific capacitance than that of 450℃.
KeyWords: NiCo2O4; electrode materials; hydrothermal synthesis method; electrochemical properties; electrochemical capacitors
目录
1文献综述1
1.1引言1
1.2电化学电容器概述1
1.3电化学电容器特性1
1.4电化学电容器的电极材料3
1.4.1碳基电极材料3
1.4.2金属氧化物电极材料4
1.4.3导电聚合物电极材料4
1.5电化学电容器的应用4
1.5.1电化学电容器在民用领域的应用4
1.5.2电化学电容器在军事领域的应用5
1.6电化学电容器在国内外的发展情况5
1.6.1电化学电容器在国内的发展情况5
1.6.2电化学电容器在国外的发展情况5
1.7金属氧化物作为赝电容电极的特性及优势7
1.7.1金属氧化物电极的特性及优势7
1.7.2钴及镍的氧化物和钴酸镍作为赝电容电极的特点8
1.8钴酸镍的可行制备方法及产物的性能测试手段8
1.8.1钴酸镍电极材料的常用制备方法8
1.8.2产物的电化学性能及测试手段9
1.9选题目的及依据9
2实验内容11
2.1实验设备11
2.1.1主要实验设备11
2.1.2其它实验设备12
2.2实验试剂12
2.3实验过程12
2.4钴酸镍粉末性能测试13
2.4.1X射线衍射分析（XRD）13
2.4.2SEM分析13
2.4.3比表面积及孔隙率表征13
2.4.4钴酸镍电极片的制备13
3结果与讨论14
3.1HMT的水热反应体系的电化学性能影响因素14
3.1.1热处理温度对电化学性能的影响14 钴酸镍电极材料电化学性能的研究:http://www.751com.cn/cailiao/lunwen_34360.html