Preparation and ionic conductive mechanism of novel electrolyte for automobile oxygen sensor
(0) Nano-sized samarium doped ceria (SDC) material was synthesized through a sol-gel method in order to improve the intermediate-temperature performance of solid electrolyte for automobile oxygen sensor.The ionic conductive behavior of the electrolyte was analyzed on the basis of electrochemical impedance spectroscopy (EIS) test,and the interaction of working temperature,defect microstructure and ionic conductivity was investigated.Accordingly,the SDC displayed an ionic conductivity of 0.029 S cm-1 at 750 ℃.It was suggested that the nano-crystalline could shorten the transfer distance of the charge carriers.Furthermore,the structural change of the polycrystal boundaries with the temperature was a key factor which promoted the oxygen ionic conductivity.
Oxygen sensor samarium doped ceria ionic conductive mechanism electrochemical impedance spectroscopy
Peng Liu Jiangrong Kong Xianfeng Yang Qicheng Liu
School of Physics and Electronics Science,Changsha University of Science and Technology,Hunan Provin College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,P.R.China
国际会议
沈阳
英文
1623-1626
2012-09-26（万方平台首次上网日期，不代表论文的发表时间）