Nasani, Narendar and Gavinola, Srinivas R and Graca, Vanessa and Allu, Amarnath R and Reddy, Raghu C and Kale, Bharat B (2021) The effect of nickel doping on the microstructure and conductivity of Ca(Ti,Al)O3-delta for solid oxide fuel cells. Journal of the American Ceramic Society, 104 (11). pp. 5689-5697. ISSN 0002-7820

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Abstract

The ABO(3) type perovskite oxide-based ceramic membranes are one of the most important classes of materials for high-temperature solid oxide fuel cell applications. The acceptor-doped calcium titanate (CaTiO3) perovskite has attracted considerable attention as an oxide ion-conducting membrane due to its potentially high ionic conductivity and excellent stability. Nonetheless, the ionic conductivity of the material must still be improved. Following the strategy of the substitution of dopants on the B-site, the current work is focused on exploring the effect of Al and Ni additions on electrical properties, by studying the nominal compositions CaTi0.7Al0.3-xNixO3-delta (x = 0, 0.1, 0.2 and 0.3). The materials were synthesized by the sol-gel method and studied as a function of phase composition, microstructure, and electrical properties. The results demonstrate an increase of both total and specific grain boundary conductivity with increasing Ni content, while predominant p-type behavior is shown under oxygen-rich atmosphere.

Item Type:	Article
Subjects:	Electronics
Divisions:	Glass
Depositing User:	Bidhan Chaudhuri
Date Deposited:	24 Dec 2021 06:32
Last Modified:	24 Dec 2021 06:32
URI:	http://cgcri.csircentral.net/id/eprint/5326

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