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Article Dans Une Revue Electrochimica Acta Année : 2015

Electrochemical reaction of lithium with ruthenium nitride thin films prepared by pulsed-DC magnetron sputtering

Résumé

Ruthenium nitride thin films with ZnS type cubic structure are successfully and reproducibly deposited by pulsed-DC magnetron sputtering. Their electrochemical behavior as negative electrode for Li-ion microbatteries is investigated by cyclic voltammetry and galvanostatic experiments. The influence of the film thickness and the rate capability are reported and discussed. A specific capacity of about 400 mA h g (1) is proved to be stable at C/2 over 20 cycles at a mean voltage of 0.25 V vs. Li+/Li and attractive specific capacities varying from 100 to 300 mu A h cm (2) can be reached depending on the thickness in the range 250 nm-850 nm. XRD, SEM, HRTEM, electron diffraction and EELS are used to understand the electrochemical mechanism of RuN with lithium. Electrochemical properties and structural characterization support the occurrence of a reversible conversion reaction of RuN into Ru metal and Li3N.
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hal-01293641 , version 1 (25-03-2016)

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Barbara Laik, Samantha Bourg, Jean Pierre Pereira-Ramos, Stéphanie Bruyere, Jean-François Pierson. Electrochemical reaction of lithium with ruthenium nitride thin films prepared by pulsed-DC magnetron sputtering. Electrochimica Acta, 2015, 164, pp.12-20. ⟨10.1016/j.electacta.2015.02.171⟩. ⟨hal-01293641⟩
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