Iron Gallium Oxide with High-Capacity and Super-Rate Performance as New Anode Materials for Li-Ion Capacitors

doi:10.1021/acs.energyfuels.1c00515

	Iron Gallium Oxide with High-Capacity and Super-Rate Performance as New Anode Materials for Li-Ion Capacitors
	He, Zheng-Hua 1; Gao, Jian-Fei 1; Kong, Ling-Bin 1,2
刊名	ENERGY & FUELS
	2021-05-06
卷号	35 期号:9 页码:8378-8386
ISSN号	0887-0624
DOI	10.1021/acs.energyfuels.1c00515
英文摘要	Thanks to the combination of the advantages of batteries and supercapacitors, battery-supercapacitor hybrid devices (BSHD) with higher power densities than batteries and higher energy densities than supercapacitors have aroused extensive concerns. Through the reasonable design of the capacity and kinetic characteristics of the cathode and anode, BSHD can provide individual advantages such as excellent properties, low cost, and safety. Li-ion BSHD has been widely studied because of lithium's low potential and small ionic radius. However, the anode with slow electrode process dynamics is a great challenge for developing high-performance Li-ion BSHD. Consequently, it is essential to develop an electrode material with better electrical conductivity and a faster electrochemical reaction process. Here, an inverse spinel oxide iron gallium oxide (FeGa2O4, FGO) is designed with Fe2+ occupying octahedral sites and Ga3+ occupying tetrahedral sites. FGO pure phase was successfully synthesized by controlling the calcination temperature and atmosphere, and the experimental results were verified by X-ray diffraction (XRD). Subsequently, the electrochemical test of the half-cell shows that the capacity is stable at 500 mAh g(-1) after 200 cycles at a current density of 0.1 A g(-1), showing that the electrode has extraordinary cycle stability. Meanwhile, the kinetics of the electrode process of the material was tested by pseudocapacitance calculations, electrochemical impedance spectra (EIS), and the galvanostatic intermittent titration technique (GITT). The results show that the material is suitable for Li-ion BSHD. The assembled Li-ion BSHD exhibits high energy density (up to 107.19 Wh kg(-1)), high power density (up to 4126.01 W kg(-1)), and long cycle life in a wide working voltage range (0.5-4.0 V). Therefore, this work has carried out a new research direction for Li-ion BSHD's electrode materials with high performance.
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000648878900103
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148673]
专题	材料科学与工程学院
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	He, Zheng-Hua,Gao, Jian-Fei,Kong, Ling-Bin. Iron Gallium Oxide with High-Capacity and Super-Rate Performance as New Anode Materials for Li-Ion Capacitors[J]. ENERGY & FUELS,2021,35(9):8378-8386.
APA	He, Zheng-Hua,Gao, Jian-Fei,&Kong, Ling-Bin.(2021).Iron Gallium Oxide with High-Capacity and Super-Rate Performance as New Anode Materials for Li-Ion Capacitors.ENERGY & FUELS,35(9),8378-8386.
MLA	He, Zheng-Hua,et al."Iron Gallium Oxide with High-Capacity and Super-Rate Performance as New Anode Materials for Li-Ion Capacitors".ENERGY & FUELS 35.9(2021):8378-8386.