Oxygen Nonstoichiometry and Electrochemical Properties of LaNiO3-δ. (13th April 2015)

• Record Type: Journal Article
• Authors: Budiman, Riyan Achmad; Hashimoto, Shin-ichi; Nakamura, Takashi; Yashiro, Keiji; Amezawa, Koji; Kawada, Tatsuya
• Is Part Of: ECS transactions. Volume 66:Number 2(2015)
• Page Start: 177
• Page End: 183
• Publication Date: 2015-04-13
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/06602.0177ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : The chemical stability and electrochemical properties of LaNiO3-δ was measured by various temperature and oxygen partial pressure p (O2). The chemical stability of LaNiO3-δ has been determined by coloumetric titration and high temperature X-ray diffraction (XRD). The LaNiO3-δ has a short range of chemical stability over the p (O2 ). At the high temperature and low p (O2 ) (10 -4 bar) the XRD patterns shows the NiO peaks, where the Ni 3+ reduce into Ni 2+ . On the other side, the study on the electrochemical impedance spectroscopy indicates that it has relatively high area specific conductivity, although it has short range chemical stability over the p (O2 ).