Electrochemical behavior of Sn/SnO2 mixtures for use as anode in lithium rechargeable batteries
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Electrochemical behavior of Sn/SnO2 mixtures for use as
anode in lithium rechargeable batteries
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| Creator |
Sivashanmugam, A.
Premkumar, T. Renganathan, N.G. Gopukumar, S. Wohlfahrt-Mehrens, M. Grche, J. |
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| Subject |
Lithium batteries
Electrochemical Power Sources |
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| Description |
Anodes derived from oxides of tin have, of late, been of considerable interest because, in principle, they can store over twice as much lithium
as graphite. A nanometric matrix of Li2O generated in situ by the electrochemical reduction of SnO2 can provide a facile environment for the
reversible alloying of lithium with tin to a maximum stoichiometry of Li4.4Sn. However, the generation of the matrix leads to a high first-cycle
irreversible capacity. With a view to increasing the reversible capacity as well as to reduce the irreversible capacity and capacity fade upon
cycling, tin–tin oxide mixtures were investigated. SnO2, synthesized by a chemical precipitation method, was mixed with tin powder at two
compositions, viz., 1:2 and 2:1, ball-milled and subjected to cycling studies. A mixture of composition Sn:SnO2 = 1:2 exhibited a specific
capacity of 549 mAh g−1 (13% higher than that for SnO2) with an irreversible capacity, which was 7% lower than that for SnO2 and a capacity
fade of 1.4 mAh g−1 cycle−1. Electrodes with this composition also exhibited a coulombic efficiency of 99% in the 40 cycles. It appears that
a matrix in which tin can be distributed without aggregation is essential for realizing tin oxide anodes with high cyclability.
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| Date |
2005
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/116/1/060-2005.pdf
Sivashanmugam, A. and Premkumar, T. and Renganathan, N.G. and Gopukumar, S. and Wohlfahrt-Mehrens, M. and Grche, J. (2005) Electrochemical behavior of Sn/SnO2 mixtures for use as anode in lithium rechargeable batteries. Journal of Power Sources, 144 (1). pp. 197-203. |
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| Relation |
http://cecri.csircentral.net/116/
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