期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 585, 期 -, 页码 705-715出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.10.050
关键词
Co3O4/CeO2 heterostructure; One-step microwave strategy; Metal-organic framework; Anode; Lithium-ion battery
资金
- National Natural Science Foundation of China [21571132, 21822808]
- Department of Education of Liaoning Province, China [LZGD2017002]
A Co3O4/CeO2 heterostructure derived from metal-organic frameworks was designed and synthesized through one-step microwave synthesis to address the issues of large volume change and low electric conductivity of Co3O4 in lithium-ion batteries. This novel strategy utilizing rare earth components showed high reversible capacity and excellent cycling stability when used as an anode material for LIBs.
Co3O4 has been extensively studied as an anode material for lithium-ion batteries (LIBs) because of its high theoretical capacity. However, during the charging-discharging processes, the issues of large volume change and low electric conductivity arise, which significantly limit the practical applications of Co3O4. To solve these issues, a Co3O4/CeO2 heterostructure derived from metal-organic frameworks (MOFs) was designed and synthesized through one-step microwave synthesis. Benefiting from the mesoporous structure and presence of hetero-components, Co3O4/CeO2 having the molar ratio of Co/Ce = 5:1 (denoted as 5Co(3)O(4)/CeO2) exhibits high reversible capacity and excellent cycling stability when used as an anode material for LIBs. Specifically, compared to a single-phase Co3O4 anode, which shows a capacity of 538.6 mAh/g after 100 cycles, 5Co(3)O(4)/CeO2 exhibits a higher capacity (1131.2 mAh/g at 100 mA/g). This study provides a novel strategy for using rare earth components to modify electrode materials. (C) 2020 Elsevier Inc. All rights reserved.
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