Mitigating chromium attack of cathode for durable solid oxide fuel cells through a strain regulation strategy - Details

author：

Indexed by：

EI Scopus SCIE

Abstract：

Solid　oxide　fuel　cells,　one　of　the　most　efficient　energy　conversion　devices,　are　prone　to　performance　degradation　induced　by　cation　surface　segregation　and　chromium　poisoning　of　cathodes.　Herein,　we　enhance　the　chromium-tolerance　of　La0.6Sr0.4Co0.2Fe0.8O3–δ　(LSCF)　cathode　by　the　regulation　of　surface　strains　through　modification　with　a　nanoscale,　dual-phase　coating.　The　coating　is　composed　of　a　nanoscale　BaCoO3−δ　conformal　film　and　BaCeO3　nanoparticles,　and　the　strong　interactions　at　BaCoO3−δ/LSCF　and　BaCeO3/LSCF　heterointerfaces　impose　a　compressive　strain　on　the　LSCF　scaffold.　The　strain　effect　significantly　suppresses　the　strontium　surface　segregation　and　thus　mitigates　the　chromium　attack　on　the　cathode.　Further,　the　microstructural　and　phase　stabilities　of　the　coating　in　volatile　chromium　environment　also　contribute　to　the　long-term　operational　stability　of　the　modified　LSCF　cathode.　A　single　cell　with　the　modified　LSCF　cathode　demonstrates　an　excellent　peak　power　density　of　1.46　W　cm−2　at　750　°C　and　remarkable　chromium-durability　in　wet　air.　This　work　opens　up　a　new　route　for　suppressing　strontium　surface　segregation　and　chromium-poisoning　of　the　cathodes.　©　2025　Elsevier　B.V.

Keyword：

Scaffolds (biology) Segregation (metallography) Surface segregation

Community：

[ 1 ] [Huang, Jiongyuan]College of Materials Science and Engineering, Fuzhou University, Fujian, Fuzhou; 350108, China
[ 2 ] [Qian, Jiaqi]College of Materials Science and Engineering, Fuzhou University, Fujian, Fuzhou; 350108, China
[ 3 ] [Wang, Cheng Cheng]Shenzhen Polytechnic University, Shenzhen; 518055, China
[ 4 ] [Chen, Zhiyi]College of Materials Science and Engineering, Fuzhou University, Fujian, Fuzhou; 350108, China
[ 5 ] [Zhang, Haipeng]College of Materials Science and Engineering, Fuzhou University, Fujian, Fuzhou; 350108, China
[ 6 ] [Cheng, Zixiang]College of Materials Science and Engineering, Fuzhou University, Fujian, Fuzhou; 350108, China
[ 7 ] [Zhao, Ling]School of Marine Science and Engineering, Hainan University, Hainan, Haikou; 570228, China
[ 8 ] [Ai, Na]Fujian College Association Instrumental Analysis Center, Fuzhou University, Fujian, Fuzhou; 350108, China
[ 9 ] [Guan, Chengzhi]Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai; 201800, China
[ 10 ] [Shao, Yanqun]College of Materials Science and Engineering, Fuzhou University, Fujian, Fuzhou; 350108, China
[ 11 ] [Jiang, San Ping]National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies, Foshan Xianhu Laboratory, Foshan; 528216, China
[ 12 ] [Jiang, San Ping]WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth; WA; 6102, Australia
[ 13 ] [Chen, Kongfa]College of Materials Science and Engineering, Fuzhou University, Fujian, Fuzhou; 350108, China

Reprint 's Address：

[jiang, san ping]wa school of mines: minerals, energy and chemical engineering, curtin university, perth; wa; 6102, australia;;[jiang, san ping]national energy key laboratory for new hydrogen-ammonia energy technologies, foshan xianhu laboratory, foshan; 528216, china

Email：

kongfa.chen@fzu.edu.cnS.Jiang@curtin.edu.au

Show more details

Version：