CeO<sub>2</sub>-C复合空心球改性硫正极的电化学性能

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Abstract CeO₂-C composite hollow spheres materials were synthesized by solvent-free template method using 3-aminophenol formaldehyde (APF) resin spheres and cerium nitrate hexahydrate (Ce (NO₃)₃·6H₂O) as raw materials. The as-prepared samples were characterized by X-raydiffractometer (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Fourier infrared spectroscopy (FTIR), etc. In addition, commercial conductive carbon black was used as the sulfur host material, and the prepared CeO₂-C composite hollow spheres were used as an additive to modify the sulfur cathode material. The electrochemical performance of the modified sulfur cathode material was tested by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), electrochemical impedance (EIS), etc. The results show that the sulfur cathodes modified by CeO₂-C composite hollow spheres exhibit higher initial discharge capacity of 1 125 mAh/g at 0.2 C, and the lower capacity decay rate of 0.083% per cycle at 1 C after 500 cycles. Using commercial conductive carbon black as sulfur carrier and adding a small amount of CeO₂-Ccomposite hollow sphere modifier to prepare sulfur cathode can effectively improve the electrochemical performance of lithium sulfur battery without changing the current preparation process of lithium sulfur battery, showing great application potential.

Key words： CeO₂-C composites hollow spheres modification of sulfur cathodes lithium-sulfur batteries solvent-free template method

Received: 14 April 2021 Published: 10 November 2021

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	LI Neng
	QIN Bihui
	HUANG Suping
	XIAO Qi

Cite this article:

LI Neng,QIN Bihui,HUANG Suping, et al. Modification of sulfur cathode by CeO₂-C composite hollow spheres and research on electrochemical performance[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(5): 465-474.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I5/465

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