Facile Synthesis and Supercapacitor Performance of M3O4(M=FeCoCrMnMg) High Entropy Oxide Powders

doi:10.15541/jim20200388

Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (4): 425-430.DOI: 10.15541/jim20200388

Special Issue: 能源材料论文精选(2021)；【能源环境】超级电容器(202409)

• RESEARCH PAPER • Previous Articles Next Articles

Facile Synthesis and Supercapacitor Performance of M₃O₄(M=FeCoCrMnMg) High Entropy Oxide Powders

WANG Yiliang¹^,²(), AI Yunlong², YANG Shuwei², LIANG Bingliang¹^,²(), ZHENG Zhenhuan³, OUYANG Sheng², HE Wen², CHEN Weihua², LIU Changhong¹^,², ZHANG Jianjun², LIU Zhiyong²

1. Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province, Nanchang Hangkong University, Nanchang 330063, China
2. School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
3. College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China

Received:2020-07-10 Revised:2020-09-26 Published:2021-04-20 Online:2020-09-20
Contact: LIANG Bingliang, PhD. E-mail: lbl@nchu.edu.cn
About author:WANG Yiliang(1995-), male, Master candidate. E-mail: 1801085204040@stu.nchu.edu.cn
Supported by:
Natural Science Foundation of China(51664043);Natural Science Foundation of China(51802140);Natural Science Foundation of Jiangxi Province(20192BAB206007);Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province(Nanchang Hangkong University Open Fund)(EJ201901455);The China Scholarship Council(201708360036)

Abstract

Abstract:

High-entropy oxides have attracted more and more attention due to their unique structures and potential applications. In this work, M₃O₄(M=FeCoCrMnMg) high entropy oxide powders were synthesized by a facile solid-state reaction method. The powders were characterized by different methods. Furthermore, M₃O₄/Ni foam (M₃O₄/NF) electrode was prepared by a coating method, followed by investigation of its supercapacitor performance. The results showed that, with the increase of calcining temperature, Fe₂O₃(H)/Co₃O₄(S)/Cr₂O₃(E) and Mn₂O₃(B) dissolved successively in the crystal lattice of spinel structure. After M₃O₄ powders being calcined at 900 ℃ for 2 h, single spinel structure (FCC, Fd-3m, a=0.8376 nm) was obtained with uniform distribution of Fe, Co, Cr, Mn, and Mg elements, the typical characteristic of high entropy oxide. In addition, the mass specific capacitance of M₃O₄/NF composite electrode is 193.7 F·g^-1, with 1 mol/L KOH as electrolyte and 1 A·g^-1 as current density, which indicated that the M₃O₄ high entropy oxide can be considered as a promising candidate for the electrode material in the field of supercapacitor applications.

Key words: M₃O₄ high entropy oxide, solid state reaction method, spinel structure, supercapacitor performance

CLC Number:

TB34

WANG Yiliang, AI Yunlong, YANG Shuwei, LIANG Bingliang, ZHENG Zhenhuan, OUYANG Sheng, HE Wen, CHEN Weihua, LIU Changhong, ZHANG Jianjun, LIU Zhiyong. Facile Synthesis and Supercapacitor Performance of M₃O₄(M=FeCoCrMnMg) High Entropy Oxide Powders[J]. Journal of Inorganic Materials, 2021, 36(4): 425-430.

Figures/Tables 5

Fig. 1 XRD patterns (a), enlarged XRD patterns (2θ=28°-38°) (b) and Rietveld refined XRD pattern (c) of M3O4 powders calcined at different temperatures

Fig. 2 SEM image(a) and particle size distribution pattern(b) of M3O4 powders

Fig. 3 STEM image(a), EDS mapping of O, Fe, Co, Cr, Mn, Mg(b-g), HRTEM image(h) and corresponding FFT pattern aligned along the $[\bar{1}14]$ zone axis(i) of M3O4

Fig. 4 XPS spectra of M3O4 (a) O1s; (b) Fe2p; (c) Co2p; (d) Cr2p; (e) Mn2p; (f) Mg1s

Fig. 5 CV curves at different scan rates (a), CP curves at different current densities (b), specific capacitance and Coulombic efficiency (c), cycle life (d) and EIS curves (e) for M3O4/NF electrode

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Facile Synthesis and Supercapacitor Performance of M₃O₄(M=FeCoCrMnMg) High Entropy Oxide Powders

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