Facile Synthesis of Multi-Channel Surface-Modified Amorphous Iron Oxide Nanospheres as High-Performance Anode Materials for Lithium-Ion Batteries

Shijin Yu (), Wenzhen Zhu, Ying Wei, Jiahao Tong, Quanya Wei, Tianrui Chen, Xuannan He, Dingwen Hu, Cuiyun Li and Hua Zhu ()
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Shijin Yu: School of Mechanical and Electrical Engineering, Jingdezhen Ceramic University, Jingdezhen 333001, China
Wenzhen Zhu: School of Mechanical and Electrical Engineering, Jingdezhen Ceramic University, Jingdezhen 333001, China
Ying Wei: School of Mechanical and Electrical Engineering, Jingdezhen Ceramic University, Jingdezhen 333001, China
Jiahao Tong: School of Mechanical and Electrical Engineering, Jingdezhen Ceramic University, Jingdezhen 333001, China
Quanya Wei: School of Mechanical and Electrical Engineering, Jingdezhen Ceramic University, Jingdezhen 333001, China
Tianrui Chen: School of Mechanical and Electrical Engineering, Jingdezhen Ceramic University, Jingdezhen 333001, China
Xuannan He: School of Mechanical and Electrical Engineering, Jingdezhen Ceramic University, Jingdezhen 333001, China
Dingwen Hu: School of Mechanical and Electrical Engineering, Jingdezhen Ceramic University, Jingdezhen 333001, China
Cuiyun Li: School of Mechanical and Electrical Engineering, Jingdezhen Ceramic University, Jingdezhen 333001, China
Hua Zhu: School of Mechanical and Electrical Engineering, Jingdezhen Ceramic University, Jingdezhen 333001, China

Energies, 2022, vol. 15, issue 16, 1-13

Abstract: Based on the synergistic effect of ripening and hydrogen ion etching in a hydrothermal solution, a simple, facile, and low-cost new strategy was demonstrated to prepare multi-channel surface-modified amorphous Fe 2 O 3 nanospheres as anodes for Li-ion batteries in this study. Compared with polycrystalline Fe 2 O 3 , the conversion reaction between amorphous Fe 2 O 3 and lithium ions has a lower Gibbs free energy change and a stronger reversibility, which can contribute to an elevation in the cycle capability of the electrode. Meanwhile, there are abundant active sites and more effective dangling bonds/defects in amorphous materials, which is beneficial to promote charge transfer and lithium-ion migration kinetics. The Galvanostatic intermittent titration analysis results confirmed that the amorphous Fe 2 O 3 electrode had a higher Li + diffusion coefficient. In addition, the surfaces of the amorphous nanospheres are corroded to produce multiple criss-cross channels. The multi-channel surface structure can not only increase the contact area between Fe 2 O 3 nanospheres and electrolyte, but also reserve space for volume expansion, thereby effectively alleviating the volume change during the intercalation-deintercalation of lithium ions. The electrochemical performance showed that the multi-channel surface-modified amorphous Fe 2 O 3 electrode exhibited a higher specific capacity, a more stable cycle performance, and a narrower voltage hysteresis. It is believed that amorphous metal oxides have great potential as high-performance anodes of next-generation lithium-ion batteries.

Keywords: lithium-ion battery; Fe 2 O 3; amorphous; anode; electrochemical performance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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