大连民族大学计算机毕业论文范文 大连民族大学本科生毕业论文模板详解.doc...

大连民族学院本科优秀毕业设计(论文)摘要

氧化铁/石墨烯气凝胶的合成及其超级电容器性能

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大连民族学院

摘 要

当今社会，日益严峻的环境问题和即将面临的化石燃料的大量消耗已经极大地刺激了人们对可持续高效存储能源系统的关注。电化学电容器也称为超级电容器，由于它节能环保并且具有高效的能量密度和功率密度，可靠的安全性能以及长期的循环寿命而逐渐引起广泛的关注。本实验以氯化铁，氯化亚铁和氧化石墨为原料，由水热合成法合成了氧化铁/石墨烯气溶胶电极材料，通过X射线衍射(XRD)，扫描电子显微镜(SEM)等方法对其形貌结构、粒径大小进行表征。利用循环伏安法(CV)，恒定电流充放电法等方法研究该电极材料在1mol/L KOH电解液中的电容行为，测定结果显示氧化铁/石墨烯气凝胶作为超级电容器的电极材料，在1A/g 电流密度下，电极比容量为357 F/g，具有良好的电化学性能。

关键词：氧化铁/氧化石墨烯；气凝胶；超级电容器；电极材料

The Synthesis of Fe2O3/ r-GO Aerogel for supercapacitor electrode

Abstract

In today's society，the ever-increasing environmental problems and the upcoming depletion of fossil fuels have been stimulated great concern for more sustainable and efficient energy storage systems. Electrochemical capacitors (ECs, also called super capacitors) had drawn increasing attention due to their environmental and energy saving, high energy density and power density, enhanced safety and long cycle life. Nanostructured Fe2O3/reduced graphene oxide (r-GO) electrode materials had been synthesized by a facile hydrothermal technique. FeCl3, FeCl2 and Graphite oxide were used as raw materials. The structure of Fe2O3/r-GO is characterized by X-ray diffraction (XRD) and the morphology is recognized by scanning electron microscopy (SEM). The capacitive behaviors of Fe2O3/r-GO were studied by cyclic voltammetry (CV) and galvanostatic charge-discharge in 1mol/L KOH electrolyte. The presence of the Fe2O3/r-GO electrode materials of Super Capacitor showed the specific capacitance of 357F/g at the current density of 1A/g, having an excellent electrochemical performance.

Key Words: Fe2O3/r-GO；Aerogel; Super Capacitor；Electrode Material

目 录

摘 要I

AbstractII

1.绪论1

1.1 超级电容器的应用前景1

1.2超级电容器的理论基础1

1.2.1超级电容器的组成结构1

1.2.2超级电容器的原理和类型2

1.2.3超级电容器的运用特性2

1.3 超级电容器的电极材料3

1.3.1碳材料类型3

1.3.2过渡金属氧化物类型3

1.3.3导电聚合物类型3

1.3.4 复