Copper-tin anodes for rechargeable lithium batteries : an example of the matrix effect in an intermetallic system.

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Lithium batteries are typically constructed from a lithium cobalt oxide cathode and a carbon anode. We have investigated intermetallic anode materials based on tin, which can provide a high capacity at a slightly higher voltage (400 mV) than metallic lithium and thus reduce the safety concerns associated with the carbon anode. In particular, we have investigated the copper-tin system at around the composition Cu{sub 6}Sn{sub 5} and have determined the effect on cycling and capacity of electrodes with various ratios of copper to tin. Anode compositions that are slightly copper rich (Cu{sub 6}Sn{sub 4}) were found to exhibit greater utilization ... continued below

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18 p.

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Kepler, K. D. September 2, 1998.

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Description

Lithium batteries are typically constructed from a lithium cobalt oxide cathode and a carbon anode. We have investigated intermetallic anode materials based on tin, which can provide a high capacity at a slightly higher voltage (400 mV) than metallic lithium and thus reduce the safety concerns associated with the carbon anode. In particular, we have investigated the copper-tin system at around the composition Cu{sub 6}Sn{sub 5} and have determined the effect on cycling and capacity of electrodes with various ratios of copper to tin. Anode compositions that are slightly copper rich (Cu{sub 6}Sn{sub 4}) were found to exhibit greater utilization of the tin than those with the stoichiometric bronze ratio (Cu{sub 6}Sn{sub 5}) or those having a slight excess of tin (Cu{sub 6}Sn{sub 6}). The differences in electrochemical behavior are explained in terms of an inert matrix model.

Physical Description

18 p.

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OSTI as DE00010945

Medium: P; Size: 18 pages

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  • 9th International Meeting on Lithium Batteries, Edinburgh (GB), 07/12/1998--07/17/1998

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  • Report No.: ANL/CMT/CP-97204
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10945
  • Archival Resource Key: ark:/67531/metadc621009

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  • September 2, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 7, 2017, 4:06 p.m.

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Kepler, K. D. Copper-tin anodes for rechargeable lithium batteries : an example of the matrix effect in an intermetallic system., article, September 2, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc621009/: accessed October 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.