金属氧化物电极的静电纺丝法制备及其电化学电容性质研究
发布时间：2019-03-26 14:16
【摘要】：电化学电容器是一种介于传统电容器和电池之间的新型储能器件。电化学电容器比传统的电容器具有更高的比容量,比电池具有更高的比功率。正因为以上优点,电化学电容器逐渐成为一种备受关注的新型储能器件。本文通过静电纺丝法,以氧化镍、氧化镍/氧化锌复合材料以及氧化铜作为电化学电容器的电极,FTO作为基体,制备了不同的金属氧化物电极。并利用恒流充放电等测试手段对这些金属氧化物电极材料的电化学性质以及电容器性能进行了研究。 利用静电纺丝法制备NiO电极。讨论了煅烧至不同温度时,NiO电极的电化学性质以及电容器性能。研究结果表明,煅烧温度对NiO-MFs电极的电化学性质有着重要的影响:NiO-MFs在较低温度时(300℃),具有较高的电导率。在恒电流充放电过程中,NiO电极材料表现出良好的电容特性,此时该电极的质量比电容为298F/g。 采用静电纺丝法制备NiO/ZnO复合材料电极。为了提高NiO电极的电化学电容器性能,我们希望通过掺杂另外一种氧化物来提高它的电化学性能。因此我们选择了氧化锌这种化学性质活泼,应用范围广泛的金属氧化物,并利用静电纺丝技术将其与氧化镍相结合作为氧化镍/氧化锌复合电极材料进行研究。ZnO与比其价态高的阳离子掺杂都会提高其电导率,而由于电导率的提高,最终导致NiO/ZnO复合电极的电容活性提高。研究结果表明,在NiO中掺杂ZnO所得到的复合电极材料比纯NiO电极材料拥有更好的电化学性质,电流密度为5A/g时,煅烧温度分别为300、500°C时其质量比电容分别为381 F/g和155 F/g。 本章选择了CuO这种金属氧化物,利用静电纺丝技术制得CuO-MFs电极材料,并对其电化学电容性能进行了研究。通过计算得到CuO电极材料在电流密度为1A/g和5A/g时的质量比电容分别为89.71F/g和46.15F/g。
[Abstract]:Electrochemical capacitor is a new type of energy storage device between traditional capacitor and battery. Electrochemical capacitor has higher specific capacity than traditional capacitor and higher specific power than battery. Because of these advantages, electrochemical capacitors have gradually become a new type of energy storage devices. In this paper, different metal oxide electrodes were prepared by electrospinning using nickel oxide, nickel oxide / zinc oxide composite and copper oxide as electrode and FTO as substrate. The electrochemical properties and capacitor properties of these metal oxide electrode materials were studied by constant current charge-discharge method. NiO electrode was prepared by electrospinning. The electrochemical properties and capacitor properties of NiO electrode were discussed when calcined to different temperatures. The results show that calcination temperature has an important effect on the electrochemical properties of NiO-MFs electrode: NiO-MFs has a higher conductivity at lower temperature (300 鈩，
本文编号：2447628
[Abstract]:Electrochemical capacitor is a new type of energy storage device between traditional capacitor and battery. Electrochemical capacitor has higher specific capacity than traditional capacitor and higher specific power than battery. Because of these advantages, electrochemical capacitors have gradually become a new type of energy storage devices. In this paper, different metal oxide electrodes were prepared by electrospinning using nickel oxide, nickel oxide / zinc oxide composite and copper oxide as electrode and FTO as substrate. The electrochemical properties and capacitor properties of these metal oxide electrode materials were studied by constant current charge-discharge method. NiO electrode was prepared by electrospinning. The electrochemical properties and capacitor properties of NiO electrode were discussed when calcined to different temperatures. The results show that calcination temperature has an important effect on the electrochemical properties of NiO-MFs electrode: NiO-MFs has a higher conductivity at lower temperature (300 鈩，
本文编号：2447628
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