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Lithium insertion in naturally surface-oxidized copper
- Source :
- Journal of Power Sources. 137:88-92
- Publication Year :
- 2004
- Publisher :
- Elsevier BV, 2004.
-
Abstract
- In order to investigate the effect of copper oxide naturally formed on copper as the common anode current collector and as an electrode additive, the electrochemical behavior of lithium insertion in three naturally surface-oxidized copper powders and one copper foil was studied. Powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), particle size distribution measurement, galvanostatic cell cycling and cyclic voltammetry were employed for structural and electrochemical characterization. Although the XRD analysis can only detect the presence of pure Cu phase, the XPS analysis reveals clearly the presence of a CuO layer on the copper powders or the copper foil. The thickness of this CuO layer is estimated as thick as 147 nm. The lithiation capacity associated with this CuO layer can reach 48 mAh/g for copper powders but only 1 mAh/g for the foil. This small capacity, or 5.2 × 10 −3 mAh/cm 2 per unit area of copper foil, is fortunately negligible compared with that of a common anode material in a lithium-ion cell; while the capacity associated with this CuO layer must be taken into account when using a copper powder as an additive to improve the cycling stability.
- Subjects :
- Copper oxide
Renewable Energy, Sustainability and the Environment
Analytical chemistry
Energy Engineering and Power Technology
chemistry.chemical_element
Electrochemistry
Copper
Anode
chemistry.chemical_compound
chemistry
X-ray photoelectron spectroscopy
Lithium
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Cyclic voltammetry
FOIL method
Subjects
Details
- ISSN :
- 03787753
- Volume :
- 137
- Database :
- OpenAIRE
- Journal :
- Journal of Power Sources
- Accession number :
- edsair.doi...........c12cabeac9b3a6eeff06665f195daba6