Issue 24, 2014

Composites of boron-doped carbon nanosheets and iron oxide nanoneedles: fabrication and lithium ion storage performance

Abstract

Novel boron-doped carbon nanosheets were prepared through a facile hydrothermal method using glucose and sodium borohydride as precursors. Taking structural advantage of the as-prepared boron-doped carbon nanosheets, high density Fe3O4 nanoneedle arrays were generated on them, resulting in the composites of boron-doped carbon nanosheets/Fe3O4 nanoneedles. The nanoneedle-like morphology and the unique perpendicular orientation of the Fe3O4 nanoneedles largely suppressed the aggregation of the boron-doped carbon nanosheets in the composites. Therefore, as lithium ion battery anodes, the composites exhibited an excellent lithium ion storage capacity, high rate capability, and decent discharge/charge cycling stability. It was demonstrated that the reversible specific capacity can reach 1132 mA h g−1 at the charge/discharge current density of 0.1 A g−1, and it can be maintained at 980 mA h g−1 after 400 cycles. Even at a high current density of 10 A g−1, the reversible capacity was still retained above 350 mA h g−1, which is much higher than that of other carbon and Fe3O4 composites reported so far. These results render the as-prepared composite as an ideal anode material for high performance lithium ion batteries.

Graphical abstract: Composites of boron-doped carbon nanosheets and iron oxide nanoneedles: fabrication and lithium ion storage performance

Supplementary files

Article information

Article type
Paper
Submitted
11 Mar 2014
Accepted
15 Apr 2014
First published
16 Apr 2014

J. Mater. Chem. A, 2014,2, 9111-9117

Author version available

Composites of boron-doped carbon nanosheets and iron oxide nanoneedles: fabrication and lithium ion storage performance

Y. Yang, J. Zhang, X. Wu, Y. Fu, H. Wu and S. Guo, J. Mater. Chem. A, 2014, 2, 9111 DOI: 10.1039/C4TA01222D

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