Method of preparing ion blocking electrode battery for measuring electronic conduction

Abstract

The invention relates to a method for preparing an ion blocked electrode battery for measuring the electron conductivity of a solid electrolyte material, which can be used for the research and representation of the electrical performance of an ionic conduction material and belongs to the field of detecting the electrical performance of functional ceramics. The invention provides a novel method for preparing the ion blocked electrode battery, that is, the method utilizes the property of high melting point of metal nickel, combines a chemical nickel plating method, solves the problem of the combination between nickel as a metal material and a ceramic material (such as a YSZ solid electrolyte material) and utilizes the electroplating method to solve the problem that the metal nickel of the ion blocked electrode material is loose and porous, thereby forming a dense ion blocked electrode which is tightly combined with a substrate material and has no oxygen leaking gap. Based on the principle of a Hebb-Wagner polarization method, the electron conductivity of an ionic conductor material at high temperature is measured. As a thin blocked electrode layer is tightly combined with the substrate material, has no oxygen leaking gap, stops the factors causing error and thus can ignore an electrode resistance and a contact resistance, thereby obtaining the accurate electron conductivity value.

Description

technical field [0001] The invention relates to a preparation method of an ion-blocking electrode battery for measuring the electronic conductivity of a solid electrolyte ion conductor (such as a YSZ material) at a high temperature. The preparation problem belongs to the technical field of functional ceramic electrical performance testing. Background technique [0002] The ionic conductance exhibited by solid electrolyte materials is far greater than its electronic conductance at a certain temperature. For example, YSZ material stabilizes its phase structure by doping a certain amount of yttrium oxide in zirconia, so that it has excellent characteristics such as high chemical stability, thermal shock resistance and strength. At a certain temperature, the carriers in the YSZ material exchange positions with the oxygen vacancies to show ionic conductivity. Like many oxides that have semiconducting properties at high temperatures, YSZ can also conduct free electrons under the...

AI Technical Summary

Problems solved by technology

[0004] The oxygen extraction method used in the traditional method of measuring electronic conductance to determine the electronic characteristic oxygen partial pressure method is relatively complicated, and the experimental error is difficult to control

The principle of the commonly used Wagner DC polarization method is not complicated, but there is a certain degree of difficulty in the actual operation of the blocking electrode.

Some people also try to use this method to measure the electronic conductance of various solid electrolytes. There are two main limitations: 1. Due to the limitation of blocking electrodes, this method can only be used to measure the electronic conductance of materials at low temperatures

2. The problem of oxygen leakage is difficult to solve, which makes the error larger

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