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Issue 24, 2014
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Flexible and stable lithium ion batteries based on three-dimensional aligned carbon nanotube/silicon hybrid electrodes

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Abstract

A three-dimensionally aligned CNT/Si hybrid for flexible and efficient anode has been developed for lithium ion batteries. A delithiation capacity of 2562 mA h g−1 was achieved at a current density of 1 A g−1 with 93% retention after 100 cycles, and the delithiation capacity was retained at 1055 mA h g−1 after 1000 cycles at 5 A g−1. The high specific capacity, cyclic stability and rate performance are ascribed to the aligned CNTs that serve as both conductive pathways and buffer scaffolds to effectively accommodate the volume change of Si in three dimensions. In addition, a stable electrochemical performance is maintained after increasing the areal density of the hybrid anode by over 10 times, indicating great promise for practical applications.

Graphical abstract: Flexible and stable lithium ion batteries based on three-dimensional aligned carbon nanotube/silicon hybrid electrodes

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Supplementary files

Article information


Submitted
10 Feb 2014
Accepted
11 Mar 2014
First published
19 Mar 2014

J. Mater. Chem. A, 2014,2, 9306-9312
Article type
Paper

Flexible and stable lithium ion batteries based on three-dimensional aligned carbon nanotube/silicon hybrid electrodes

W. Weng, H. Lin, X. Chen, J. Ren, Z. Zhang, L. Qiu, G. Guan and H. Peng, J. Mater. Chem. A, 2014, 2, 9306 DOI: 10.1039/C4TA00711E

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