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Issue 6, 2014
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Controllable synthesis of SnO2@C yolk–shell nanospheres as a high-performance anode material for lithium ion batteries

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Abstract

In this work, we report a facile synthesis of uniform SnO2@C yolk–shell nanospheres as high-performance anode materials for lithium ion batteries (LIBs). The yolk–shell structured SnO2@C nanospheres were fabricated through a two-step sol–gel coating process by using tetraethyl orthosilicate (TEOS) and resorcinol–formaldehyde (RF) as precursors, where the silica interlayer not only acts as a template to produce the void space, but also promotes the coating of the RF layer. The synthesis is easy to operate and allows tailoring the carbon shell thickness and void space size. The resultant SnO2@C yolk–shell nanospheres possess a hollow highly crystalline SnO2 core (280–380 nm), tailored carbon shell thickness (15–25 nm) and a large void space size (100–160 nm), a high surface area (∼205 m2 g−1), a large pore volume (∼0.25 cm3 g−1), as well as a high SnO2 content (77 wt%). When evaluated as an anode of LIBs, the materials manifest superior electrochemical performance with a high lithium storage capability (2190 mA h g−1 in initial discharge capacity; >950 mA h g−1 in the first 10 cycles), a good cycling performance and an excellent rate capability.

Graphical abstract: Controllable synthesis of SnO2@C yolk–shell nanospheres as a high-performance anode material for lithium ion batteries

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Supplementary files

Article information


Submitted
05 Dec 2013
Accepted
03 Jan 2014
First published
07 Jan 2014

Nanoscale, 2014,6, 3217-3222
Article type
Paper
Author version available

Controllable synthesis of SnO2@C yolk–shell nanospheres as a high-performance anode material for lithium ion batteries

J. Wang, W. Li, F. Wang, Y. Xia, A. M. Asiri and D. Zhao, Nanoscale, 2014, 6, 3217
DOI: 10.1039/C3NR06452B

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