Electrochemical investigation of polarization phenomena and intercalation kinetics of oxidized graphite electrodes coated with evaporated metal layers |
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Authors: | F Nobili S Dsoke M Mancini R Tossici R Marassi |
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Affiliation: | aDipartimento di Scienze Chimiche, Università di Camerino, Via S. Agostino, 1, Camerino 62032, Italy |
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Abstract: | The electrochemical behavior of partially oxidized graphite electrodes coated with 50 Å thick Au, Cu, In, Pb or Sn layers has been studied by slow scan rate cyclic voltammetry and galvanostatic charge–discharge. Electrochemical impedance spectroscopy (EIS) has also been applied to Cu- and Sn-coated electrodes in order to study the effect of the metal coating on the interfacial intercalation/deintercalation kinetics. The results demonstrate that certain metallic layers produce remarkable improvements of intercalation kinetics of graphite electrodes by reducing the charge-transfer and the solid–electrolyte interface (SEI) resistance making this type of surface modification attractive for the development of high rate anodes for lithium-ion batteries. |
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Keywords: | Metal-coated graphite Electrochemical impedance spectroscopy Lithium-ion batteries |
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