In search of higher capacity anodes for secondary Li-ion cells, it has been observed that active with respect to Li nanoparticles, such as Sn and Si, attached on the surface of a less active material, such as C. allow for high capacities to be achieved. In the present study it will be shown that deposition of SnO2 nanoparticles on an amorphous C surface allows for preferred electrochemical properties during cycling. In particular. it was found that a 8 wt% Sn-C nanocomposite provided a capacity that is 85% higher than that of the pure C matrix; the capacity of the C was 180 mAh/g, while that of the 8 wt% Sn-C was 340 mAh/g and was retained for over 500 cycles. The SnO2 particles not only provide Sn as a high capacity Li-intercalation material, but also protect the surface of the C from electrolyte decomposition. (C) 2010 Elsevier Ltd. All rights reserved.

SnO2/C nanocomposites as anodes in secondary Li-ion batteries / Aifantis, K. E.; Brutti, S.; Hackney, S. A.; Sarakonsri, T.; Scrosati, Bruno. - In: ELECTROCHIMICA ACTA. - ISSN 0013-4686. - STAMPA. - 55:18(2010), pp. 5071-5076. [10.1016/j.electacta.2010.03.083]

SnO2/C nanocomposites as anodes in secondary Li-ion batteries

S. Brutti;SCROSATI, Bruno
2010

Abstract

In search of higher capacity anodes for secondary Li-ion cells, it has been observed that active with respect to Li nanoparticles, such as Sn and Si, attached on the surface of a less active material, such as C. allow for high capacities to be achieved. In the present study it will be shown that deposition of SnO2 nanoparticles on an amorphous C surface allows for preferred electrochemical properties during cycling. In particular. it was found that a 8 wt% Sn-C nanocomposite provided a capacity that is 85% higher than that of the pure C matrix; the capacity of the C was 180 mAh/g, while that of the 8 wt% Sn-C was 340 mAh/g and was retained for over 500 cycles. The SnO2 particles not only provide Sn as a high capacity Li-intercalation material, but also protect the surface of the C from electrolyte decomposition. (C) 2010 Elsevier Ltd. All rights reserved.
2010
amorphous carbon; anodes; li batteries; nanocomposites; tin (sn)
01 Pubblicazione su rivista::01a Articolo in rivista
SnO2/C nanocomposites as anodes in secondary Li-ion batteries / Aifantis, K. E.; Brutti, S.; Hackney, S. A.; Sarakonsri, T.; Scrosati, Bruno. - In: ELECTROCHIMICA ACTA. - ISSN 0013-4686. - STAMPA. - 55:18(2010), pp. 5071-5076. [10.1016/j.electacta.2010.03.083]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/360173
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