期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 857, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2019.113749
关键词
Lithium-ion battery; Anode; EDTA complex; Iron carbide; Iron oxide
资金
- Tianjin Key Projects of New Materials Science and Technology [17ZXCLGX00050]
Iron oxide such as Fe3O4 is one of the promising anode materials for lithium-ion batteries (LiBs) due to a high theoretical specific capacity of 924 mAh g(-1). In practical, Fe3O4 nanoparticles with various morphologies generally have to be composited with carbonaceous matrices because of their low conductivity and huge lattice volume variation during charge-discharge process. In this work, nitrogen-enriched graphitic carbon encapsulated Fe3O4/Fe3C/Fe composite was first prepared using EDTA-Fe(III) sodium complex as the precursor. The composite exhibits a high reversible capacity of about 600 mAh g(-1) at a current density of 100 mA g(-1). Meanwhile, it demonstrates excellent rate capability and superior cycling stability due to a synergistic boosting effect of the embedded Fe3C/Fe nanopartides, enriched nitrogen and highly graphitic carbon in the composite. (C) 2019 Elsevier B.V. All rights reserved.
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