α-Fe2O3/还原氧化石墨烯(RGO)的制备及应用

摘要为实现非对称超级电容器(ASC)的高电化学性能,以FeCl₃·6H₂O为铁源,通过水热法将α-Fe₂O₃纳米颗粒均匀分散在还原的氧化石墨烯(RGO)薄片上,成功制备α-Fe₂O₃/RGO复合材料。该复合材料采用SEM、TEM、XRD和XPS进行表征,并利用标准三电极体系进行电化学性能测试。结果显示:高度组装的α-Fe₂O₃/RGO在1 A·g^-1下具有740.8 F·g^-1的大比电容,并且于5 A·g^-1下实现80.0%的长循环稳定性(10 000圈)。以制备的α-Fe₂O₃/RGO为负极,NiCo₂O₄为正极组装了NiCo₂O₄//α-Fe₂O₃/RGO非对称超级电容器,不仅在792.8 W·kg^-1下获得47.8 Wh·kg^-1的能量密度,而且在5 A·g^-1下仍然维持78.6%的循环稳定性(10 000圈)。这极大地促进了ASC在储能系统的应用。

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	王宏智
	包赛赛
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	张卫国

关键词： α-Fe₂O₃ 石墨烯非对称超级电容器循环性能

Abstract： The α-Fe₂O₃/RGO composite with α-Fe₂O₃ nanoparticles (FeCl₃·6H₂O as the iron source) uniformly dispersed on reduced graphene oxide (RGO) flakes was successfully prepared by a hydrothermal method to achieve high electrochemical performance of asymmetric supercapacitors (ASCs). It was characterized by SEM, TEM, XRD, and XPS. And electrochemical properties were tested using a standard three-electrode system. The results show that the highly assembled α-Fe₂O₃/RGO has a large specific capacitance of 740.8 F·g^-1 at 1 A·g^-1 and a long cycle stability of 80.0% (10 000 cycles) at 5 A·g^-1. The NiCo₂O₄//α-Fe₂O₃/RGO asymmetric supercapacitor was assembled with the prepared α-Fe₂O₃/RGO as the negative electrode and NiCo₂O₄ as the positive electrode. The energy density of 47.8 Wh·kg^-1 was obtained at 792.8 W·kg^-1, and 78.6% cyclic stability (10 000 cycles) was maintained at 5 A·g^-1. This greatly promotes the application of ASCs in energy storage systems.

Keywords： α-Fe₂O₃ graphene asymmetric supercapacitor cycle performance

Received 2022-06-01;

Corresponding Authors: 张卫国,教授,zwg@tju.edu.cn Email: zwg@tju.edu.cn

About author: 王宏智(1973—),男,博士,副教授,现从事新能源材料研究。

引用本文:

王宏智, 包赛赛, 苏展, 于金山, 张卫国.α-Fe₂O₃/还原氧化石墨烯(RGO)的制备及应用[J]. 化学工业与工程, 2025,42(1): 88-97

WANG Hongzhi, BAO Saisai, SU Zhan, YU Jinshan, ZHANG Weiguo.Preparation and application of α-Fe₂O₃/reduced graphene oxide (RGO)[J]. Chemcial Industry and Engineering, 2025,42(1): 88-97

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