摘要
利用水相合成和煅烧法制备了一种具有六边形结构的片状多孔四氧化三钴(Co_3O_4)材料,通过扫描电镜、X射线衍射仪和比表面-孔径分布分析仪分别表征了其形貌、晶相和比表面及孔径分布情况。采用循环伏安法、恒流充放电法和交流阻抗法考察了该Co_3O_4修饰玻碳电极(Nafion/Co_3O_4/GCE)的电化学性质。结果表明,在2.0 mol·L-1KOH溶液中,电位窗口为-0.4～0.4 V(vs. Hg/HgO)的范围内,该Co_3O_4在1.0 mA·cm^(-2)的电流密度下比容量达39.39 mF·cm^(-2),在5.5 mA·cm^(-2)的电流密度下经过1000次循环后比电容量从初始的25.02 mF·cm^(-2)上升至27.24 mF·cm^(-2),表现出良好的电容特性和稳定性。
Porous hexagon Co3O4 sheet was synthesized by liquid-phase synthesis and calcination. The morphology, crystal phase, specific surface and pore size distribution of Co3O4 were characterized by field emission scanning electron microscopy, X ray diffraction and automated surface area-pore size analyzer. The electrochemical properties of the Co3O4 modified glassy carbon electrode(Nafion/Co3O4/GCE) were investigated by cyclic voltammetry, galvanostatic charge discharge measurements and electrochemical impedance spectra. The results showed that the specific capacity of the Co3O4 was 39.39 mF·cm^-2 at the current density of 1 mA·cm^-2 in 2.0 mol·L^-1 KOH solution, which increased from 25.02 mF·cm^-2 to 27.24 mF·cm^-2 at the current density of 5.5 mA·cm^-2 after 1000 cycles. The hexagon Co3O4 sheets exhibited excellent capacitance characteristics and stability.
作者
门永玲
邹如意
罗贵铃
马欣莉
王思
王萌
孙伟
MEN Yongling;ZOU Ruyi;LUO Guiling;MA Xinli;WANG Si;WANG Meng;SUN Wei(Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou,College of Chemistry and ChemicalEngineering,Hainan Normal University,Haikou 571158,China)
出处
《海南师范大学学报（自然科学版）》
CAS
2019年第1期6-11,共6页
Journal of Hainan Normal University（Natural Science）
基金
2018年海南师范大学大学生创新训练计划项目(201811658029)
2017年海南师范大学研究生创新科研项目(Hsyx2017-11)
海口市重点科技项目(2017042)
海南省自然科学基金创新团队项目(2017CXTD007)
关键词
片状六边形Co3O4
循环伏安法
恒电流充放电
超级电容器
porous hexagon Co3O4 sheet
cyclic voltammetry
galvanostatic charge discharge measurements
supercapacitor
