Electrochemical investigation of polarization phenomena and intercalation kinetics of oxidized graphite electrodes coated with evaporated metal layers

Nobili, F.; Dsoke, S.; Mancini, M.; Tossici, R.; Marassi, R.

doi:10.1016/j.jpowsour.2008.02.069

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The electrochemical behavior of partially oxidized graphite electrodes coated with 50 ˚A thick Au, Cu, In,Pb or Sn layers has been studied by slowscan 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.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11581/112556

Titolo:	Electrochemical investigation of polarization phenomena and intercalation kinetics of oxidized graphite electrodes coated with evaporated metal layers
Autori interni:	NOBILI, Francesco TOSSICI, Roberto MARASSI, Roberto
Data di pubblicazione:	2008
Rivista:	JOURNAL OF POWER SOURCES
Abstract:	The electrochemical behavior of partially oxidized graphite electrodes coated with 50 ˚A thick Au, Cu, In,Pb or Sn layers has been studied by slowscan 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.
Handle:	http://hdl.handle.net/11581/112556
Appare nelle tipologie:	Articolo

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