Abstract
A carbonaceous thin-film electrode was prepared by plasma-assisted chemical vapor deposition, and used as a model carbon electrode to study the interfacial reactions between a electrode and electrolyte. Lithium-ion transfer at the interface between carbonaceous thin-film electrode and electrolyte was studied by electrochemical impedance spectroscopy. In the Nyquist plots, semi-circles assigned to charge-transfer resistance were observed in high frequency region. Activation energies for lithium-ion transfer at the interface between carbonaceous thin-film electrode and electrolyte were evaluated, and the values were found to be dependent on the electrolyte solutions. The effects of ion-solvent interaction on the activation energies for the interfacial lithium-ion transfer are discussed based on theoretical calculations.
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