化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (11) : 177-186.

科学研究

NiO@CeO₂纳米花材料的合成及其超级电容器性能

潘静静, 吴玉荣, 朱彦荣, 岳彩波, 伊廷锋

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Preparation and supercapacitor performance of NiO@CeO₂ nanoflower

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Received		Published
2017-07-08		2018-11-20
Issue Date	Revised Date
2018-12-04	2017-07-08

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摘要

采用乙醇辅助的水热法制备了超级电容器NiO@CeO₂纳米花材料。利用X射线衍射(XRD)和扫描电镜(SEM)分别研究了材料的结构和形貌;采用循环伏安(CV)、恒流充放电测试以及电化学阻抗研究了材料的电化学性能。XRD表明,NiO@CeO₂电极材料与NiO具有相似的结构。SEM显示,NiO@CeO₂电极材料是由纳米片堆积而成。CV结果表明,NiO@CeO₂电极材料具有一对氧化还原峰。充放电测试结果表明,NiO@CeO₂电极材料具有较高的比容量和较好的循环稳定性。电化学阻抗结果表明,NiO@CeO₂电极材料在循环5000次之后阻抗增加是其容量降低的主要原因。

Abstract

NiO@CeO₂ nanoflower electrode material for supercapacitor was synthesized by hydrothermal method,and the structure and morphology were researched by X-ray diffraction (XRD) and scanning electron microscopy (SEM),respectively.The electrochemical properties were investigated by cyclic voltammetry (CV),galvanostatic charge-discharge and electrochemical impedance spectroscopy (EIS),respectively.XRD showed that the structure of NiO@CeO₂ was similar with NiO.SEM pictures indicated that the morphology of NiO@CeO₂ was accumulated by nanosheet.CV test indicated that NiO@CeO₂ had a couple redox peaks.Charge-discharge measurement revealed that NiO@CeO₂ had wonderful specific capacity and cycling stability.EIS exhibited that the resistance value after 5000 cycles was increased,and it may be the reason of reduction of capacity.

关键词

超级电容器 / NiO@CeO₂ / 纳米花 / 电极材料 / 水热法

Key words

supercapacitor / NiO@CeO₂ / nanoflower / electrode material / hydrothermal method

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潘静静, 吴玉荣, 朱彦荣, 岳彩波, 伊廷锋. NiO@CeO₂纳米花材料的合成及其超级电容器性能[J]. 化工新型材料, 2018, 46(11): 177-186 DOI:

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