Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/68281
Title: An alumina stabilized graphene oxide wrapped SnO2 hollow sphere LIB anode with improved lithium storage
Authors: Liu, X
Sun, Q
Ng, AMC
Djurišić, AB
Xie, M
Dai, B
Tang, J
Surya, C 
Liao, C
Shih, K
Issue Date: 2015
Publisher: Royal Society of Chemistry
Source: RSC advances, 2015, v. 5, no. 122, p. 100783-100789 How to cite?
Journal: RSC advances 
Abstract: SnO2 hollow spheres were stabilized by graphene oxide wrapping, by alumina coating deposited via atomic layer deposition (ALD), or the combination of the two methods and used in lithium ion battery anodes. We found that graphene oxide wrapping provides a better buffering of volume changes and results in reduced electrode pulverization and better preservation of the electrode morphology compared to bare SnO2 hollow spheres. On the other hand, ALD coating provides a significant improvement in the rate performance of the anodes, and it could also improve the adhesion of the metal oxide to the conductive additive since the coating is applied to the entire electrode. The combination of the two techniques results in anodes with superior cycling and rate performance, with specific capacity of 1176 mA h g−1 after 60 cycles at 0.1 A g−1 (compared to 115 mA h g−1 for bare hollow SnO2 nanospheres) and specific capacity of 329 mA h g−1 at 2 A g−1 charge/discharge rate (compared to 7 mA h g−1 for bare SnO2 hollow spheres). The improvement in the performance was attributed to the superior preservation of anode morphology after cycling.
URI: http://hdl.handle.net/10397/68281
EISSN: 2046-2069
DOI: 10.1039/C5RA22482A
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