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

Abstract

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

Sputtered vanadium carbon nitride (VCN) thin films: a potential electrode for supercapacitors

“…They have a high conductivity of 4000 to 55,000 s cm −1 and a tremendous power density. Commonly used metal nitrides are TiN, Mo 2 N, VN, RuN, FeN, Ni 3 N, TaN, NbN, etc [9][10][11][12][13][14]. Among these materials, vanadium nitride (VN) has emerged as a dominant electrode material for SC since it has a larger specific capacitance (nearly 1340 Fg −1 ) over carbonbased materials, and a higher electrical conductivity (1.67 × 10 6 Sm −1 ) over transition metal sulphides [6], oxides [12,14], and hydroxides [15].…”

High stability asymmetric supercapacitor cell developed with novel microwave-synthesized graphene-stabilized ruthenium antimonide nanomaterial

“…For example, hydrous ruthenium oxide electrodes were effectively arranged by electrophoretic deposition by Jang et al [10], and the material was heattreated to control the water content at 150 • C, 250 • C and 300 • C. The anode conveyed a huge explicit capacitance (734 F g − 1 and 608 F g − 1 at an output pace of 1 mV s − 1 and 50 mV s − 1 sweep rates respectively) but lacked cyclic stability as just 4 % of the underlying capacitance was retained after 50 cycles. In recent times, novel materials of ruthenium based composites have been synthesized and proposed to be capacitive [11][12][13]. Aside from the low cyclability of RuO 2 , the compound is additionally prevented by; the re-stacking of its particles, and low conductivity between nanoparticles, therefore, the actual test of the Cs are normally lower than the calculated value.…”