四氧化三铁/石墨烯纳米复合材料的静电自组装制备及储锂性能

doi:10.11896/cldb.20090163

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Abstract Asimple and fast colloid electrostatic self-assembly method which followed a heat treatment process was adopted to prepare the ferroferric oxide/reduced graphene oxide composite nanomaterials (FGCM). The crystal structure, chemical composition and morphology of as-synthesized nanocomposites were characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), Raman microscopy, X-ray photoelectron spectroscopy (XPS) and N₂ adsorption-desorption experiments. The analyses showed that spherical Fe₃O₄ particles about 7 nm were loaded uniformly and tightly onto reduced graphene oxide (rGO) sheets surface, and, as a result, the aggregating of the Fe₃O₄ nanoparticles was effectively prevented. The electrochemical properties of FGCM were investigated for a potential anode material in lithium-ion batteries (LIBs). FGCM showed a high specific capacity of 1 405 mAh·g^-1 in the initial discharge at current density of 100 mA·g^-1, the specific capacitance still retained as high as 663 mAh·g^-1 even after 100 cycles because of synergistic effect between the pure Fe₃O₄ and rGO components. In addition, the composites also presented significantly durable cycling stability and superior rate capability. These results indicate that the FGCM is a promising electrode material which combines the advantages of graphene and ferroferric oxide for high performance LIBs.

Key words： grapheme ferroferric oxide electrostatic self-assembly composite lithium-ion battery

Published: Online: 2021-09-07

CLC number:

O648.1

Fund:Natural Science Foundation of China (21373189), Science and Technology Project of Henan Province, China (212102311111).

About author: Yankun Wangreceived his Ph.D. degree from Zhengzhou University in 2016. He is currently an associate professor in College of Economic Environment, Henan Finance University. His research is mainly focus on the synthesis and characterization of Li ion battery anode.

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Cite this article:

WANG Yankun. Colloid Electrostatic Self-assembly Synthesis of Ferroferric Oxide/Reduced Graphene Oxide Nanocomposites for Lithium Storage[J]. Materials Reports, 2021, 35(16): 16008-16014.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.20090163 OR http://www.mater-rep.com/EN/Y2021/V35/I16/16008

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