Preparation of FeSe2 Material with Three-dimensional Large Framework Structure and Study on Its Lithium Storage Mechanism
HU Sisi, LIU Qian, LI Wen, WANG Bo
Hebei Key Laboratory of Flexible Functional Materials, School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, China
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.
胡思思, 刘倩, 李文, 王波. 三维大骨架结构FeSe2材料的制备及储锂机理研究[J]. 材料导报, 2022, 36(8): 21010183-5.
HU Sisi, LIU Qian, LI Wen, WANG Bo. Preparation of FeSe2 Material with Three-dimensional Large Framework Structure and Study on Its Lithium Storage Mechanism. Materials Reports, 2022, 36(8): 21010183-5.
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