Tuning La2O3 to high ionic conductivity by Ni-doping

被引：15

作者：

Wang, Faze ^{[1
]}

Hu, Enyi ^{[1
]}

Wang, Jun ^{[1
]}

Yu, Lei ^{[1
,2
]}

Hong, Soonpa ^{[3
]}

Kim, Jung-Sik ^{[4
]}

Zhu, Bin ^{[1
,4
]}

机构：

[1] Southeast Univ, Sch Energy & Environm, Jiangsu Prov Key Lab Solar Energy Sci & Technol, Nanjing 210096, Peoples R China

[2] Nanjing SolarU Energy Saving Technol Co Ltd, Nanjing 210096, Peoples R China

[3] Minist Trade Ind & Energy, Energy Safety Div, Sejong Si 30118, South Korea

[4] Loughborough Univ, Dept Aero & Auto Engn, Loughborough LE11 3TU, Leics, England

来源：

CHEMICAL COMMUNICATIONS | 2022年 / 58卷 / 27期

关键词：

LANTHANUM OXIDE; ELECTROLYTE; COMPOSITE;

D O I：

10.1039/d1cc07183a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ni-doped La2O3 was developed as an ionic conducting membrane corresponding to a conductivity of 0.187 S cm(-1) at 550 degrees C. A peak power density of 970 mW cm(-2) with an open circuit voltage of 1.05 V was achieved using 10 mol% Ni-doped La2O3 (10NLO). XPS and Raman investigations reveal that the performance enhancement is due to the high concentration of oxygen vacancies. Density functional theory calculations verify that Ni doping can tune the band structure of La2O3 to enhance its electrochemical performance. A Schottky junction barrier is formed at the anode to avoid short circuit problems and facilitate the ionic transportation at the anode/electrolyte interface. This study indicates that wide-band gap semiconductors with suitable element-doping can be tuned to be promising ionic conductors for advanced fuel cell applications.

引用

页码：4360 / 4363

页数：4

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