Facile synthesis of porous germanium-iron bimetal oxide nanowires as anode materials for lithium-ion batteries

Germanium-based oxide has been found to be a promising high-capacity anode material for lithium-ion batteries (LIBs). However, it exhibits poor electrochemical performance because of the drastic volume change during cycling. Herein, we designed porous Ge-Fe bimetal oxide nanowires (Ge-Fe-O x -700 NW...

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Bibliographic Details
Published in:Nano research 2018-07, Vol.11 (7), p.3702-3709
Main Authors: Zhong, Xiongwu, Huan, Huijuan, Liu, Xiaowu, Yu, Yan
Format: Article
Language:English
Subjects:
Anodes
Atomic/Molecular Structure and Spectra
Bimetals
Biomedicine
Biotechnology
Chemistry and Materials Science
Condensed Matter Physics
Current density
Cycles
Diffusion length
Dimensional changes
Electrochemical analysis
Electrochemistry
Electrode materials
Germanium
Iron
Lithium
Lithium-ion batteries
Materials Science
Nanoparticles
Nanotechnology
Nanowires
Rechargeable batteries
Research Article
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Summary:Germanium-based oxide has been found to be a promising high-capacity anode material for lithium-ion batteries (LIBs). However, it exhibits poor electrochemical performance because of the drastic volume change during cycling. Herein, we designed porous Ge-Fe bimetal oxide nanowires (Ge-Fe-O x -700 NWs) by a large-scale and facile solvothermal reaction. When used as the anode material for LIBs, these Ge-Fe-O x -700 NWs exhibited superior electrochemical performance (∼ 1,120 mAh·g −1 at a current density of 100 mA·g −1 ) and good cycling performance (∼ 750 mAh·g −1 after 50 cycles at a current density of 100 mA·g −1 ). The improved performance is due to the small NW diameter, which allows for better accommodation of the drastic volume changes and zero-dimensional nanoparticles, which shorten the diffusion length of ions and electrons.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-017-1938-z