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Issue 34, 2015
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FeOx and Si nano-dots as dual Li-storage centers bonded with graphene for high performance lithium ion batteries

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Abstract

A novel design based on both FeOx and Si nano-dots bonded with graphene (FeOx·Si@GNS) as dual lithium-storage centers is reported. They show high performance as anode materials for Li-ion batteries with a remarkable reversible capacity of 1160 mA h g−1 at 0.2 A g−1, fast charging/discharging rate, and long cycling life (e.g., a capacity retention of 81.7% at 2.0 A g−1 after 600 cycles). The origin of these high performances comes from the key factors of the high theoretical specific capacity of FeOx and Si, the shorter Li-ion diffusion distance of both nano-dot structures, fast electron conductivity, and the strain relaxation due to volume variations of both nano-dots bonded with graphene nanosheets during cycles.

Graphical abstract: FeOx and Si nano-dots as dual Li-storage centers bonded with graphene for high performance lithium ion batteries

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Supplementary files

Article information


Submitted
20 May 2015
Accepted
21 Jul 2015
First published
23 Jul 2015

Nanoscale, 2015,7, 14344-14350
Article type
Paper

FeOx and Si nano-dots as dual Li-storage centers bonded with graphene for high performance lithium ion batteries

J. Yang, J. Zheng, L. Hu, R. Tan, K. Wang, S. Mu and F. Pan, Nanoscale, 2015, 7, 14344
DOI: 10.1039/C5NR03311J

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