Response to comments on "Ionic transport in (Nano)composites for fuel cells, Int. J. Hydrogen Energy 41 (2016) 7666-7675" Mishandling of literature data on ionic conductivity enhancement in oxide plus salt composites


A recent commentary suggesting mishandled literature data in the analysis of the performance of composites including salts (alkaline carbonates) and oxides (pure ceria) is shown here as invalid. Even inadequately invoked data for the salt conductivity is shown to remain below the required performance. This conclusion is inevitable when due attention is paid to the salt volume fraction (50 vol%) and electrical pathway (tortuosity, >= 2) within the composite, both decreasing the effective electrical conductivity with respect to the fully dense salt. Furthermore, newly invoked data is inadequate for not being representative of the properties of the salt under analysis, including mismatching chemical composition and electrical performance. Other issues transgressing usual standards in scientific communications are also shortly addressed. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.




Chemistry; Electrochemistry; Energy & Fuels


Rondao, AIB; Martins, NCT; Patricio, SG; Marques, FMB

nossos autores


Work performed with funding from Projects NANOMFC (New-INDIGO/0001/2013) and CICECO-Aveiro Institute of Materials (Ref. FCT UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement. S.G. Patricio and A.I.B. Ronda. thank FCT for the grants SFRH/BPD/75943/2011 and SFRH/BDE/52139/2013, respectively. The authors would like also to express their special appreciation to several members of the wider scientific community that helped in finding relevant information handled in this Rebuttal.

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