Spinel-Type (FeCoCrMnZn)(3)O(4) High-Entropy Oxide: Facile Preparation and Supercapacitor Performance.

Spinel-Type (FeCoCrMnZn)(3)O(4) High-Entropy Oxide: Facile Preparation and Supercapacitor Performance.
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尖晶石型 (FeCoCrMnZn)3O4 高熵氧化物:易于制备和超级电容器性能

DOI:
10.3390/ma13245798
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发表时间:
2020-12-18
期刊:
Materials (Basel, Switzerland)
影响因子:
--
通讯作者:
Liu M
Liu M
中科院分区:
其他
文献类型:
--
作者:
Liang B;Ai Y;Wang Y;Liu C;Ouyang S;Liu M

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高熵氧化物因其独特的结构和潜在的应用前景而受到越来越多的关注。本文采用固相反应法合成了(FeCoCrMnZn)3 O 4 HEO粉体。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线能谱(EDS)、X射线光电子能谱(XPS)等分析手段,对样品的相组成进行了确认,对显微结构进行了观察,并对样品的晶体结构、元素分布、元素价态进行了分析。采用包覆法制备了(FeCoCrMnZn)3 O 4/泡沫镍((FeCoCrMnZn)3 O 4/NF)电极,并研究了其超级电容器性能。结果表明:(FeCoCrMnZn)3 O 4粉体经900 °C煅烧2 h后,得到单一的尖晶石结构(FCC,Fd-3 m,a = 0.8399 nm),Fe,Co,Cr,Mn,Zn元素分布均匀,具有典型的高熵氧化物特征。此外,(FeCoCrMnZn)3 O 4/NF复合电极的质量比电容为340.3 F·g-1(以1 M KOH为电解质,1A·g-1电流密度),这表明(FeCoCrMnZn)3 O 4 HEO可以被视为超级电容器应用领域中的电极材料的有前景的候选者。
High-entropy oxides (HEOs) have attracted more and more attention because of their unique structures and potential applications. In this work, (FeCoCrMnZn)3O4 HEO powders were synthesized via a facile solid-state reaction route. The confirmation of phase composition, the observation of microstructure, and the analysis of crystal structure, distribution of elements, and valences of elements were conducted by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS), respectively. Furthermore, a (FeCoCrMnZn)3O4/nickel foam ((FeCoCrMnZn)3O4/NF) electrode was prepared via a coating method, followed by the investigation of its supercapacitor performance. The results show that, after calcining (FeCoCrMnZn)3O4 powders at 900 °C for 2 h, a single spinel structure (FCC, Fd-3m, a = 0.8399 nm) was obtained with uniform distribution of Fe, Co, Cr, Mn, and Zn elements, the typical characteristic of a high-entropy oxide. In addition, the mass specific capacitance of the (FeCoCrMnZn)3O4/NF composite electrode was 340.3 F·g−1 (with 1 M KOH as the electrolyte and 1 A·g−1 current density), which indicates that the (FeCoCrMnZn)3O4 HEO can be regarded as a prospective candidate for an electrode material in the field of supercapacitor applications.
熵稳定的氧化物。
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