化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (2) : 112-116.

新材料与新技术

ZnCo₂O₄@CoMoO₄三维电极的制备及超级电容性能研究

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Study on preparation of ZnCo₂O₄@CoMoO₄ 3D electrode and its supercapacitor performance

Ding Zhuofeng¹, Yang Yongqiang², Li Zaijun¹

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Received		Published
2019-05-28		2020-02-20
Issue Date	Revised Date
2020-03-02	2019-05-28

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摘要

采用六次甲基四胺作为碱源和氟化铵作为晶体生长的形貌调节剂,经过水热反应和煅烧处理在泡沫镍表面生长花簇状ZnCo₂O₄纳米片。通过二次水热反应和煅烧处理在花簇状ZnCo₂O₄纳米片表面原位生长细小的CoMoO₄纳米片,得到具有分级核壳纳米结构的ZnCo₂O₄@CoMoO₄三维电极。通过X射线衍射、扫描电镜、BET比表面积对样品结构、形貌进行了表征。电容性能测试结果表明,ZnCo₂O₄@CoMoO₄三维电极相比较于单独的 ZnCo₂O₄和CoMoO₄电极具有更高的比电容、倍率特性和循环稳定性。在电流密度为5mA/cm²或50mA/cm²下,面积比电容分别达到6.05F/cm²或3.72F/cm²。在电流密度为30mA/cm²下循环充放电3000次后,比电容保持率为94.2%。

Abstract

Flower cluster-like ZnCo₂O₄ nanosheets were grown on the surface of nickel foam via the hydrothermal reaction and calcination treatment,in which hexamethylenetetramine used as the alkali source,and ammonium fluoride as the morphology modifier of the crystal growth.The fine CoMoO₄ nanosheets were grown in-situ on the surface of the flower cluster-like ZnCo₂O₄ nanosheets by secondary hydrothermal reaction and calcination treatment to obtain hierarchical core-shell structured ZnCo₂O₄@CoMoO₄ 3D electrode.The structure and morphology of the samples were characterized by XRD,SEM and BET.The capacitive performance test results shown that the ZnCo₂O₄@CoMoO₄ exhibited higher specific capacitance,rate characteristics and cycle stability than the ZnCo₂O₄ and CoMoO₄ electrodes.Its area (mass) specific capacitance reached to 6.05/3.72F/cm² (1833.2/1127.3F/g) at the current density of 5/50mA/cm².The specific capacitance retention rate was 94.2% after 3000 cycles of charge and discharge at the current density of 30mA/cm².

关键词

ZnCo₂O₄@CoMoO₄ / 三维电极 / 超级电容器 / 电容性能

Key words

ZnCo₂O₄@CoMoO₄ / three-dimensional (3D)electrode / supercapacitor / capacitive performance

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ZnCo₂O₄@CoMoO₄三维电极的制备及超级电容性能研究[J]. 化工新型材料, 2020, 48(2): 112-116 DOI:

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