Impact of volatile boron species on the microstructure and performance of nano-structured (Gd,Ce)O2 infiltrated (La,Sr)MnO3 cathodes of solid oxide fuel cells

► Impact of volatile boron on infiltrated GDC-LSM electrodes of SOFC was studied for the first time. ► Boron deposition on nano-structured GDC-LSM electrodes occurs at 800 °C. ► Boron deposition causes significant grain growth and agglomeration of infiltrated GDC nanoparticles. ► Boron deposition causes significant deterioration of electrochemical activity of nano-structured GDC-LSM electrodes.