Kinetics and thermodynamics of carbonation of a promising SOFC cathode material La0.5Ba0.5CoO3−δ (LBC)
Abstract
This work examines the reactivity of a potentially promising SOFC cathode material, La0.5Ba0.5CoO3−δ (LBC), under CO2 atmosphere. Through a combination of different techniques – thermogravimetric analysis, ex situ XRD analyses of reacted products, and in situ XRD analysis – the reaction pathway and kinetics for LBC carbonation is investigated. The thermodynamic phase boundary for carbonate formation in the LBC–CO2 system has been generated and fundamental thermodynamic parameters – the standard state enthalpy (ΔH°) and the standard state entropy (ΔS°) – are determined.