Electrochemical ageing study of mixed lanthanum/praseodymium nickelates La2-xPrxNiO4+δ as oxygen electrodes for solid oxide fuel or electrolysis cells  

作　　者：Vaibhav Vibhu Aurélien Flura Aline Rougier Clément Nicollet Sébastien Fourcade Teresa Hungria Jean-Claude Grenier Jean-Marc Bassat 

机构地区：[1]CNRS,Univ.Bordeaux,Bordeaux INP,ICMCB,UMR 5026,F-33600 Pessac,France [2]Centre de Microcaractérisation Raimond CASTAING,Universitéde Toulouse,CNRS,UT3–Paul Sabatier,INP,INSA,Espace Clément Ader,3 rue Caroline Aigle,Toulouse 31400,France

出　　处：《Journal of Energy Chemistry》2020年第7期62-70,I0003,共10页能源化学（英文版）

基　　金：PEREN project(reference:ANR-2011-PREG-016–05);the ECOREVE project(reference:ANR-18-CE05-0036-01);the Agence Nationale de la Recherche(A.N.R.,France)for supporting these scientific works and for the financial support。

摘　　要：The chemical and electrochemical stability of lanthanide nickelates La2 NiO4+δ(LNO),Pr2 NiO4+δ(PNO)and their mixed compounds La(2-x)PrxNiO4+δ(LPNOs)with x=0.5,1 or 1.5 is reported.The aim is to promote these materials as efficient electrodes for solid oxide fuel cell(SOFC)and/or solid oxide electrolysis cell(SOEC).La2 NiO4+δand La1.5Pr0.5NiO4+δcompounds are chemically very stable as powders over one month in the temperature range 600-800℃,while the other materials rich in praseodymium progressively decompose into various perovskite-deriving components with additional Pr6 O11.Despite their uneven properties,all these materials are quite efficient and sustainable as electrodes on top of gadolinium doped ceria(GDCBL)//yttrium doped zirconia(8 YSZ)electrolyte,for one month at 700℃without polarization.Under polarization(300 mA·cm-2),the electrochemical performances of LNO,PNO and La1.5Pr0.5NiO4+δ(LP5 NO)quickly degrade in SOFC mode,i.e.for the oxygen reduction reaction,while they show durability in SOEC mode,i.e.for the oxide oxidation reaction.

关 键 词：Lanthanide nickelates SOFC cathode SOEC anode Stability Inductive loop Degradation 

分 类 号：O646.5[理学—物理化学] TM911.4[理学—化学]