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Structural, magnetic, electrical, and electrochemical properties of Sr–Co–Ru–O: A hybrid‐capacitor application
Author(s) -
Altin Serdar,
Bayri Ali,
Demirel Serkan,
Oz Erdinc,
Altin Emine,
Avci Sevda
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15698
Subject(s) - orthorhombic crystal system , materials science , electrical resistivity and conductivity , hexagonal phase , phase (matter) , analytical chemistry (journal) , electrochemistry , crystal structure , hexagonal crystal system , crystallography , chemistry , electrode , electrical engineering , organic chemistry , chromatography , engineering
In this study, we report the synthesis of SrCo 1− x Ru x O 3−δ nominal compositions, where x = 0.0‐1.0, using solid‐state reaction technique. XRD analysis confirms the structure of x = 0 sample as hexagonal Sr 6 Co 5 O 15 . As the Co ions are substituted by Ru, a two‐phase structure (hexagonal R32 and orthorhombic Pbnm) emerges up to x ≤ 0.5. As the Ru content is increased further, the hexagonal R32 phase disappears completely and an orthorhombic Pbnm phase becomes the main phase. SEM images show that grain size of the samples decreases with increasing Ru content. Temperature‐dependent electrical conductivity studies indicate upon Ru substitution in the nominal SrCo 1− x Ru x O 3−δ compounds, resistivity decreases due to appearance of metallic SrRuO 3 phase. The cyclic voltammogram (CV) of the samples show capacitive properties upon Ru substitution. The cycle measurements of the capacitors yield promising results for potential supercapacitor applications.