Abstract The selection of anode materials for asymmetric supercapacitors (ASCs) has been a great challenge for the further development. As a promising anode material, Fe2O3 can effectively improve the energy density of supercapacitors. This article reviews the modification methods of Fe2O3 anodes based on different elements, which improves the conductivity and specific capacitance. In terms of carbon modification, different forms of carbon are used to change the structure or properties of Fe2O3 to obtain a larger specific surface area and electron transmission rate. In terms of modification based on metal elements, the synergy between metal oxides or metal ions and Fe2O3 improves the specific capacitance and energy density of Fe2O3. When the metal surface is modified, the core-shell structure is used to improve the charge storage and transmission capabilities. In addition, a variety of elements have been used together to further develop the properties of the elements. The proposal of carbon quantum dots (CQDs) doped with other elements provide a new reference for investigation. The article introduces the current situation of using elements to transform Fe2O3 anodes from several components, and illustrates the potential applications of these methods in the future. This paper aims to provide ideas for improving the study of the Fe2O3 anode which is a promising electrode material for high-performance supercapacitors.

中文翻译：

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作为不对称超级电容器阳极的氧化铁 (III) 元素组成的修改：一个小评论

摘要 非对称超级电容器（ASCs）负极材料的选择一直是进一步发展的巨大挑战。Fe2O3作为一种很有前途的负极材料，可以有效提高超级电容器的能量密度。本文综述了基于不同元素的Fe2O3阳极改性方法，提高了电导率和比电容。在碳改性方面，利用不同形式的碳来改变Fe2O3的结构或性质，以获得更大的比表面积和电子传输率。在基于金属元素的改性方面，金属氧化物或金属离子与Fe2O3之间的协同作用提高了Fe2O3的比电容和能量密度。当金属表面改性时，核壳结构用于提高电荷存储和传输能力。此外，多种元素已被一起使用，以进一步开发元素的特性。掺杂其他元素的碳量子点（CQDs）的提出为研究提供了新的参考。文章介绍了使用元素从几个组分转化 Fe2O3 阳极的现状，并说明了这些方法在未来的潜在应用。本文旨在为改进 Fe2O3 阳极的研究提供思路，Fe2O3 阳极是一种很有前途的高性能超级电容器电极材料。掺杂其他元素的碳量子点（CQDs）的提出为研究提供了新的参考。文章介绍了使用元素从几个组分转化 Fe2O3 阳极的现状，并说明了这些方法在未来的潜在应用。本文旨在为改进 Fe2O3 阳极的研究提供思路，Fe2O3 阳极是一种很有前途的高性能超级电容器电极材料。掺杂其他元素的碳量子点（CQDs）的提出为研究提供了新的参考。文章介绍了使用元素从几个组分转化 Fe2O3 阳极的现状，并说明了这些方法在未来的潜在应用。本文旨在为改进 Fe2O3 阳极的研究提供思路，Fe2O3 阳极是一种很有前途的高性能超级电容器电极材料。