thin films were prepared by reactive rf sputtering and used in the application as electrodes in rechargeable battery with Li as a counterelectrode. The films were deposited onto uncoated and coated glass by sputtering a V cathode using gas mixtures. The structural properties of the films were characterized by x-ray diffraction, infrared spectroscopy, and photoelectron spectroscopy (XPS: x-ray induced and UPS: UV induced photoelectron spectroscopy). Microbatteries were constructed using the thin films as cathode, carbonate as the electrolyte and Li metal as the anode. The electrodes were characterized by there electrochemical behavior (current–voltage curves during charging and recharging). X-ray diffraction measurement demonstrated that unannealed films were amorphous with no sharp reflexes. Annealing to was sufficient to produce crystalline (monoclinic) on uncoated glass or orthorhombic on coated glass. XPS spectra revealed the expected V/O ratio and line positions. However, the O peak was split into two components, one from the component (530.4 eV), the other at 532.9 eV is attributed to the uptake of water from the atmosphere. The charged microbattery resulted in a maximum voltage of 3.4 V for the currentless circuit and a capacity of With XPS we could demonstrate the migration of Sn (from the conductive coating of the glass substrate) into the layer for the Li intercalated electrodes. Further, UPS spectra from charged and uncharged indicate band-gap changes due to the Li uptake.
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July 2003
Papers from the 49th International Symposium of the American Vacuum Society
3-8 November 2002
Denver, Colorado (USA)
Research Article|
July 03 2003
Investigation of oxide thin films as electrodes for rechargeable microbatteries using Li
Arturo Talledo;
Arturo Talledo
Faculty of Science, Universidad Nacional de Ingenieria, Lima, Peru
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Héctor Valdivia;
Héctor Valdivia
Faculty of Science, Universidad Nacional de Ingenieria, Lima, Peru
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Carsten Benndorf
Carsten Benndorf
Department of Chemistry, University of Hamburg, Bundesstrasse 45, d-20146 Hamburg, Germany
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Arturo Talledo
Héctor Valdivia
Carsten Benndorf
Faculty of Science, Universidad Nacional de Ingenieria, Lima, Peru
J. Vac. Sci. Technol. A 21, 1494–1499 (2003)
Article history
Received:
December 12 2002
Accepted:
May 05 2003
Citation
Arturo Talledo, Héctor Valdivia, Carsten Benndorf; Investigation of oxide thin films as electrodes for rechargeable microbatteries using Li. J. Vac. Sci. Technol. A 1 July 2003; 21 (4): 1494–1499. https://doi.org/10.1116/1.1586282
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