Method for preparing a complex oxygen ion conductor electrolyte film by quick heat treatment of collosol and gel

Abstract

The invention relates to a method for preparing multilayer compound nano oxygen ion conductor electrolyte film material, adopting rapid heat treatment sol-gel methd to prepare a multilayer film A / (B / A)n (A and B stand for YSZ or RCO, n>=1), where the preparing process for each film layer: sole precursor preparing, spin-spreading coating, rapid heat treatment, and film forming, in which, YSZ film preparation adopts ZrOCl2. 8H2O and Y(NO3)3.6H2O, uses ammonia as precipitator, uses thin hydrochloric acid to regulate pH value of solution, and uses glycol as metal chelating agent and the YSZ film is 10-400 nm thick; RCO film preparation adopts Ce(NO3)3.6H2O and R2O3, uses oxalic acid as precipitator and citric acid as metal chelating agent, and the RCO film is 10-400 nm thick. Circulating the above steps can prepare uniformly thick, compact, high-quality multilayer compound nano electrolyte film, shortening film making cycle, raising the efficiency, and reducing the cost.

Description

technical field [0001] The invention belongs to the technical field of functional new materials, and relates to a rapid heat treatment sol-gel preparation method of a multilayer composite nanometer oxygen ion conductor electrolyte film material. Background technique [0002] Oxygen ion conductor solid electrolyte is a kind of object that exhibits oxygen ion conductivity in solid state, and is widely used in solid oxide fuel cells (SOFC) and other fields. As one of the key materials of fuel cells, electrolyte largely determines the performance and cost of fuel cells. As an oxygen ion conductor electrolyte, it must have high ion mobility (t i ≥0.99, t e <0.01), high ionic conductivity, low electronic conductivity and sufficient mechanical strength, phase stability and compactness. Yttrium (Y) stabilized ZrO 2 (referred to as YSZ) CeO doped with rare earths such as Gd and Y 2 Based electrolytes (referred to as RCO) are two important types of oxygen ion conductor electro...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of YSZ and RCO electrolyte and make multi-layer composite nano film structure A / (B / A) n (A and B represent YSZ or RCO respectively, n≥1) rapid heat treatment sol-gel method solves the problem of poor film quality and electrical properties and long film production cycle caused by long-term high-temperature heat treatment in the traditional sol-gel film production method , high cost and other issues