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

Laïk, Barbara; Bourg, Samantha; Pereira-Ramos, J.P.; Bruyère, Stéphanie; Pierson, J.F.

doi:10.1016/j.electacta.2015.02.171

Cited by 18 publications

(14 citation statements)

References 24 publications

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“…S1), indicating its dynamic instability. ZnS-type RuN was also reported to have been deposited by pulsed-DC magnetron sputtering at the pressure of 1 Pa and the temperature of about 50 °C2021. Similar to NaCl-type RuN, we found that ZnS-type RuN is also mechanically unstable with a negative C 44 value (−170 GPa).…”

Section: Resultssupporting

confidence: 55%

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Diverse ruthenium nitrides stabilized under pressure: a theoretical prediction

Zhang

Wan

et al. 2016

Sci Rep

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First-principles calculations were performed to understand the structural stability, synthesis routes, mechanical and electronic properties of diverse ruthenium nitrides. RuN with a new I-4m2 symmetry stabilized by pressure is found to be energetically preferred over the experimental NaCl-type and ZnS-type ones. The Pnnm-RuN2 is found to be stable above 1.1 GPa, in agreement with the experimental results. Specifically, new stoichiometries like RuN3 and RuN4 are proposed firstly to be thermodynamically stable, and the dynamical and mechanical stabilities of the newly predicted structures have been verified by checking their phonon spectra and elastic constants. A phase transition from P4/mmm-RuN4 to C2/c-RuN4 is also uncovered at 23.0 GPa. Drawn from bonding and band structure analysis, P4/mmm-RuN4 exhibits semi-metal-like behavior and becomes a semiconductor for the high-pressure C2/c-RuN4 phase. Meanwhile the P21/c-RuN3 shows metallic feature. Highly directional covalent N-N and Ru-N bonds are formed and dominating in N-enriched Ru nitrides, making them promising hard materials.

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Section: Resultssupporting

confidence: 55%

“…ZnS-type RuN thin films were also reported in the later studies2021. Recently, RuN 2 with marcasite-type structure and bulk modulus of 330 GPa was identified by Niwa et al 17…”

mentioning

confidence: 87%

Diverse ruthenium nitrides stabilized under pressure: a theoretical prediction

Zhang

Wan

et al. 2016

Sci Rep

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“…During Li-ion battery discharge, the metal nitride is reduced to metal nanoparticles, with formation of conductive lithium nitride, as schematized in Equation (1) (in the case of oxide electrodes, the Li2O that is formed is not a good conductor). The process is quite reversible; however, the electrode surface turns out to be modified, after recharging, with the appearance of uniformly dispersed platelets [5]. Based on the capacities measured and the influence of the thickness, not only the electrode surface but also the bulk of the material seems to be largely involved:…”

Section: Open Accessmentioning

confidence: 99%

“…Its preparation has been realized by physical techniques, i.e., pulsed laser ablation [1] and reactive ion-sputtering [2,3]. Preliminary investigations have shown that suitably supported RuN films are interesting for energy storage and conversion: potential applications include their use as electrocatalysts [4], or as negative electrodes in lithium-ion batteries [5].…”

Section: Introductionmentioning

confidence: 99%

Charge-Storage Process of Stoichiometric and Nanostructured Ruthenium Nitride Thin Films

2015

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Ti-supported RuN thin films, synthesized by rf-magnetron sputtering, have been electrochemically characterized, focusing in particular to their charge-storage capacity, and to the mechanisms that influence this important property, in view, e.g., of applications in supercapacitors. Based on cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) data, a deconvolution of non-faradic and faradic contributions has been attempted, and a mechanism for the charging/discharging process has been proposed

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“…To our knowledge, ruthenium nitride has never been studied for this negative material application and yet it has a high theoretical specific mass capacity about 700 mAh i l . Its behavior has been investigated in this respect [7][8]. Electrochemical properties versus lithium have been evaluated.…”

Section: Conversion Reactionmentioning

confidence: 99%