The invention discloses an A-site layered
perovskite type
electrode material and a preparation method thereof, belonging to the technical field of
solid oxide fuel cells. By utilizing the high oxygenion
conductivity property of the A-site layered
perovskite oxide, and the multivalent state and the anti-reduction property of the B-site Mn
ion, the invention synthesizes and prepares a symmetric
electrode material with stable structure and excellent electrochemical performance. Through the
doping of B-site
transition metal ions (Fe, Co, Ni), the catalytic activity of the material is further controlled. The molecular formula of the
electrode material is: LnBaMn2xMxO5+
delta, wherein Ln is equal to Sm, Gd, Nd, M is equal to Mn, Fe, Co, Ni, x is not less than 0 and not greater than 2, and deltais not less than 0 and not greater than 1. The
electrode material is classified into a dense
electrode material and a
porous film type
electrode material. The presence of A-site ions provides sufficient
oxygen vacancy concentration for the material, which contributes to the improvement of the
ionic conductivity of the material. The selected
transition metal elements, with low-cost feature and lower
metal-
oxygen strengthening feature, may further improve
oxygen vacancy concentration in the grid. At the same time, the d-
electron features of the elements may also enhance the catalytic activity ofthe material.