化工新型材料

化工新型材料 ›› 2023, Vol. 51 ›› Issue (7) : 127-131. DOI: 10.19817/j.cnki.issn1006-3536.2023.07.023

新材料与新技术

α-Fe₂O₃/炭纳米纤维电极材料的制备及其电化学性能分析

^1,2,*

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Preparation of α-Fe₂O₃/carbon nanofiber electrode material and its electrochemical performance

Lin Gang¹, Zhang Yating^1,2, Zhang Nana¹, Zhang Ting¹, Suo Ke¹, Li Keke¹, Zhu Youyu¹

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2022-03-30
Issue Date	Revised Date
2023-07-31	2022-03-30

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摘要

采用电沉积技术将α-Fe₂O₃均匀负载在静电纺丝炭纳米纤维上,制备α-Fe₂O₃/炭纳米纤维复合材料。利用扫描电镜(SEM)、X射线衍射仪(XRD)以及物理吸附对复合材料进行形貌和结构分析,并通过恒电流充放电、循环伏安、交流阻抗技术考察其作为超级电容器电极材料的电化学性能。结果表明:α-Fe₂O₃/炭纳米纤维(α-Fe₂O₃/CNF-3)复合材料相比单纯炭纳米纤维(CNF)有着更丰富的介孔结构,有利于离子和电子的低电阻传输。同时,α-Fe₂O₃/CNF-3复合电极材料结合了双电层电容和赝电容的优良性能,在电流密度为1A/g下,电解液为6mol/L KOH时,其比电容值可达330.1F/g,是炭纳米纤维电极的3.76倍,并且经过8000次循环后仍能保持91.45%,具有较好的稳定性。

Abstract

The α-Fe₂O₃ was uniformly loaded on electrospun carbon nanofibers (CNFs) using electrodeposition technique to prepare α-Fe₂O₃/carbon nanofiber (α-Fe₂O₃/CNF) composite material.The morphology and structure of the composites were analyzed by SEM,XRD and physisorption.The electrochemical properties of the composite material as supercapacitor electrode material were investigated by constant current charge-discharge,cyclic voltammetry,and AC impedance techniques.The results showed that the α-Fe₂O₃/carbon nanofiber (α-Fe₂O₃/CNF-3) composites had a richer mesoporous structure than pure CNF,which was favorable to the low resistance transmission of ions and electrons.Meanwhile,the α-Fe₂O₃/CNF-3 composite electrode material combined the excellent properties of double-layer capacitance and pseudocapacitance.At a current density of 1 A/g and an electrolyte of 6mol/L KOH,its specific capacitance value could reach 330.1F/g,which was 3.76 times higher than that of the carbon nanofibers electrode and could still maintain 91.45% after 8000 charging-discharging cycles,indicating good stability.

关键词

炭纳米纤维 / α-Fe₂O₃; / 电沉积 / 电极材料

Key words

carbon nanofiber / α-Fe₂O₃; / electrodeposition / electrode material

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α-Fe₂O₃/炭纳米纤维电极材料的制备及其电化学性能分析[J]. 化工新型材料, 2023, 51(7): 127-131 DOI:10.19817/j.cnki.issn1006-3536.2023.07.023

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