Solid oxide fuel cell cathode material and application thereof

Abstract

The invention relates to a solid oxide fuel cell, in particular to a transition element titanium or scandium-doped LSM (La0.8Sr0.2MnO3-Delta) cathode material and an application thereof. The cathode material includes the following component: [La(1-x)Srx] (1-y)Mn(1-z)MzO(3+ / -delta), (X and Y are more than 0 but less than 1, Z is more than 0 but less than or equal to 1, and delta is more than -1 but less than 1), wherein M is titanium or scandium element. The solid oxide fuel cell cathode comprises 1-100 percent of the cathode material and 0-99 percent of electrolyte material according to the mass percent; and the electrolyte material is one or more of 5-20 mol percent of Y2O3 stabilized ZrO2, 5-20 mol percent of Sc2O3 stabilized ZrO2, SmxCe(1-x)O2, GdxCe (1-x)O2, YxCe(1-x)O2, LaxCe(1-x)O2 and La(1-x)SrxGa(1-y)MgyO3 (X and Y are more than 0 but less than 1). The activity of catalytic oxygen reduction reaction of the LSM cathode material can be enhanced, the reaction process of oxygen on the surface of the cathode material is quickened, and the cathode polarization is reduced, therefore, the output power of the solid oxide fuel cell is effectively improved, and the output performance of a 600 DEG C battery is enhanced by twice than that of the standard LSM battery.

Description

technical field [0001] The invention relates to a solid oxide fuel cell, in particular to a high-performance modified lanthanum strontium manganate (LSM) perovskite solid oxide fuel cell cathode material doped with transition element titanium or scandium and its application. Background technique [0002] Solid oxide fuel cell (SOFC) is a power generation technology that uses solid oxygen ion conductors as electrolyte membranes and can directly convert chemical energy into electrical energy. Solid oxide fuel cells are rich in fuel resources and can directly use natural gas, syngas, biogas, liquefied gas and other hydrocarbons as fuels; NO x and SO x Low emissions. SOFC power generation efficiency can reach 50%, and combined with other technologies (such as gas turbines), the power generation efficiency can reach 60-70%. [0003] A single cell is the core component of a solid oxide fuel cell, consisting of an electrolyte, an anode, and a cathode. with ABO 3 Lanthanum stro...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention aims to solve the problem of low catalytic activity of LSM (lanthanum strontium manganate) cathode material in solid oxide fuel cells, by introducing transition element titanium or Scandium, while adjusting the ratio of strontium and lanthanum at the A site, thereby changing the structure of the active components of the cathode material to improve the electrocatalytic oxygen reduction activity of the LSM (lanthanum strontium manganate) cathode material, and reduce the LSM (lanthanum strontium manganate) cathode The polarization overpotential increases the output power of the battery