Low temperature electrolyte membrane of H-SOFC (high temperature solid oxide fuel cell) and preparation method

Abstract

The invention relates to the field of fuel cells and discloses a low temperature electrolyte membrane of an H-SOFC (high temperature solid oxide fuel cell) and a preparation method. The method comprises the following steps of: (1) mixing a raw material A and a raw material B, adding a doping oxide to prepare a doped compound in an A2B2O7 solid solution fluorite structure, (2) adding the doped compound into concentrated nitric acid, di-ethyl alcohol and citric acid to prepare doped nano gel, and (3) performing drying, pressing, sintering, annealing and cold treatment on the doped nano gel to form a doped nano ceramic membrane material. Compared with the common electrolyte, since a reaction occurs at a cathode, the electrolyte membrane of the fuel cell is good in structural stability and durability and high in mechanical strength; output power of a cell is stable for a long time; the cell is low in working temperature and high in electrical efficiency; and the fuel cell electrolyte membrane is simple in preparation process and low in production cost and has better economic advantages and application prospects.

Description

technical field [0001] The invention relates to the field of fuel cells, and discloses a low-temperature H-SOFC type fuel cell electrolyte membrane and a preparation method. Background technique [0002] Solid oxide fuel cell (SOFC) belongs to the third-generation fuel cell, which is an all-solid-state chemical power generation device that directly converts the chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner at medium and high temperatures. It is generally considered to be a fuel cell that will be widely used in the future like the proton exchange membrane fuel cell. In addition to the advantages of high efficiency and low pollution of general fuel cells, it also has the advantages of wide fuel adaptability, high energy conversion efficiency, all solid state, modular assembly, zero pollution, etc., and can directly use hydrogen, carbon monoxide, natural gas, A variety of hydrocarbon fuels such as liquefie...

AI Technical Summary

Problems solved by technology

[0007] According to the above, the electrolyte materials used in solid oxide fuel cells in the existing schemes generally have unstable structures, are easily reduced under low oxygen partial pressures, have high operating temperatures for fuel cells, high conduction activation energy, and conductivity in the medium temperature range. Low defects, and the traditional hydrogen proton electrolyte material has problems such as complex preparation process and low electrical efficiency. In view of this, the present invention proposes a low-temperature H-SOFC fuel cell electrolyte membrane, which can effectively solve the above technical problems