三维大骨架结构FeSe<sub>2</sub>材料的制备及储锂机理研究

doi:10.11896/cldb.21010183

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Abstract In order to improve the specific capacity and prolong safety life of lithium-ion batteries, three-dimensional large-frame FeSe₂ composite materials were prepared by chemical blow molding and sintering selenization. The prepared materials were characterized by X-ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), and X-ray energy spectroscopy (EDS). The results show that the FeSe₂ material exhibits a stable three-dimensional large-frame honeycomb structure with the elements evenly distributed. Cyclic voltammetry (CV) and galvanostatic charge-discharge test were used to analyze the lithium storage performance of the prepared material as the anode electrode of lithium-ion battery. The results show that the specific capacity of lithium-ion battery can reach 827.9 mAh/g at the second round at the current density of 100 mA/g. After a long cycle of 1 000 cycles at the current density of 500 mA/g, the specific capacity increases by 30.35% compared to the second cycle, the battery showing higher specific capacity and longer cycle life.

Key words： three-dimensional large framework FeSe₂ lithium ion battery long cycle life

Published: 25 April 2022 Online: 2022-04-27

CLC number:

TQ152

Fund:National Natural Science Foundation of China (22008053,52002111) and the Key Research and Development Program of Hebei Province (20310601D,205A4401D).

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	HU Sisi
	LIU Qian
	LI Wen
	WANG Bo

Cite this article:

HU Sisi,LIU Qian,LI Wen, et al. Preparation of FeSe₂ Material with Three-dimensional Large Framework Structure and Study on Its Lithium Storage Mechanism[J]. Materials Reports, 2022, 36(8): 21010183-5.

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http://www.mater-rep.com/EN/10.11896/cldb.21010183 OR http://www.mater-rep.com/EN/Y2022/V36/I8/21010183

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