Impact of pore microstructure evolution on polarization resistance of Ni-Yttria-stabilized zirconia fuel cell anodes

▶ 3D tomography showed the high temperature evolution of Ni-YSZ anodes. ▶ Ni particle size changed little, constrained by the high vol% YSZ matrix. ▶ Pore percolation decreased and interfacial area decreased. ▶ The pore evolution substantially decreased the electrochemically active TPB. ▶ The loss of active TPBs explained observed anode polarization resistance increase.