The Effects of Si Addition to the Tin Oxide Thin Films on the Electrochemical Characteristics for Lithium Secondary Microbattery Anode

Abstract:

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For lithium secondary microbattery anode, the tin oxide thin films with the various Si additions (0, 2, 6, 10, 20mol%) were prepared on the p-type (100) SiO2/Si substrate by R.F. magnetron sputtering method at the substrate temperature of 300°C under the gas ratio of Ar/O2 (7/3). The effect of Si addition to the SnO2 thin film on the structural change and electrochemical performance and the reversible capacity performance was investigated. As Si addition amounts increased, Si-O bonding density increased and Sn-O bonding density decreased. The addition of optimum Si amount led decrease of Sn oxidation state so that the irreversible capacity was reduced and cycle characteristic was enhanced during the charge-discharge test. SnO2 films with 6mol%Si had the highest reversible capacity of 700mAh/g after 100cycles.

Info:

Periodical:

Materials Science Forum (Volumes 510-511)

Edited by:

Hyung Sun Kim, Yu Bao Li and Soo Wohn Lee

Pages:

1130-1133

DOI:

10.4028/www.scientific.net/MSF.510-511.1130

Citation:

C. H. Park and Y. G. Son, "The Effects of Si Addition to the Tin Oxide Thin Films on the Electrochemical Characteristics for Lithium Secondary Microbattery Anode", Materials Science Forum, Vols. 510-511, pp. 1130-1133, 2006

Online since:

March 2006

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$35.00

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