Journal
JOURNAL OF APPLIED ELECTROCHEMISTRY
Volume 40, Issue 2, Pages 233-239Publisher
SPRINGER
DOI: 10.1007/s10800-009-9996-x
Keywords
Copper; Li-ion batteries; Electrochemistry quartz crystal microbalance; Electrochemical impedance spectroscopy
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Funding
- MCT-CNPq-FAPES [36303542/2007]
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Information about the copper electrodeposition mechanism at different pH values was obtained using an electrochemical quartz crystal microbalance (EQCM) technique, as well as potentiodynamic, potentiostatic, and electrochemical impedance spectroscopy (EIS) techniques. In agreement with the measurements obtained from the EQCM and potentiostatic experiments, an intermediate Cu+ species and a CuO layer are formed. Simultaneous mechanism of direct reduction of Cu2+ and copper oxide (CuO) reduction at pH 2.0 and 4.5 occur. The EIS experiment shows a diffusion-controlled process by the presence of a Warburg element, a CPE related to the irregular metallic copper electrodeposition, and a resistance of the electrodeposit.
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