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Understanding fast ion conduction in solids: synergy between modelling and experiment

Slater, Peter and Kendrick, Emma (2009) Understanding fast ion conduction in solids: synergy between modelling and experiment

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Abstract

Materials displaying high oxide-ion and/or proton conductivity have been attracting considerable interest for application as electrolytes in solid oxide fuel cells. In this respect, materials with the fluorite or perovskite-type structures have traditionally been targeted, but there is now growing interest in new structure-types. Important aspects to address are the dominant defects and mechanism of ionic conduction in such systems, and in this paper we highlight the benefits of a combined experimental and computer modelling approach to the investigation of such systems. With reference to recent work on apatite-type Ln9.33+x(Si/GeO4)6O2+3x/2, gallate-based Ln1-xBa1+xGaO4-x/2, and cuspidine-type Ln4(Ti2-xGaxO8-x/2)O2 (Ln=rare earth) we discuss the conduction mechanisms in these systems, showing the importance of co-operative effects in the conduction process.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Additional Information: Presented at Supergen/RCEP Conference, Oxford 2008
Uncontrolled Keywords: apatite, solid oxide fuel cell, energy, modelling, ionic conduction, proton conduction, oxide ion conduction
Divisions: Faculty of Engineering and Physical Sciences > Chemistry
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:43
Last Modified: 23 Sep 2013 18:34
URI: http://epubs.surrey.ac.uk/id/eprint/1685

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