期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 782, 期 -, 页码 699-708出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.12.170
关键词
ZnFe2O4; Electrospray; LIB; Anode; Graphene
资金
- Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) - Ministry of Science, ICT and Future Planning [NRF-2016M1A2A2936760, NRF-2017R1A2B4005639, NRF-2016R1A2B3009481]
Bimetallic (zinc-iron) oxide with a pillar-like morphology is decorated over graphene films. The electrosprayed composite demonstrates good electrochemical performance as an anode material for lithiumion batteries. Scanning and transmission electron microscopy images confirm the effective decoration of graphene sheets with bimetallic Zn-Fe oxide particles. The composite shows a high capacity of 1601 mAh.g(-1) at 100 mA.g(-1) owing to its unique layer-particle morphology. The anode material exhibits excellent capacity retention of 77% (similar to 1235 mAh.g(-1) at 100 mA.g(-1)) after 100 cycles, due to buffering of volumetric strain in the metal oxide by flexible conductive graphene sheets. Zinc forms an alloy with the lithium ions, and the graphene sheets prevent particle agglomeration, keeping transport distances within particles small. Thus, synthesizing a composite of graphene with Zn-Fe oxides via electrospray deposition is a promising method for preparing high-performance anode materials for lithium-ion batteries. (C) 2018 Elsevier B.V. All rights reserved.
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