TY - JOUR
T1 - Efficient ion conductivity enhancement mechanism induced by metal ion diffusion of SOFCs based on Fe-doped Gd2O3 electrolyte
AU - Lu, Yuzheng
AU - Liu, Yu
AU - Yousaf, Muhammad
AU - Shah, Muhammad Ali Kamran Yousaf
AU - Yan, Senlin
AU - Lu, Chunhua
N1 - Publisher Copyright:
© 2023
PY - 2023/8/1
Y1 - 2023/8/1
N2 - Considerable efforts have been made in the past several decades to search for electrolytes that can work at low temperatures for solid oxide fuel cells (SOFCs). The rare-earth oxide Gd2O3 is a thermodynamically stable semiconductor material, but it has not yet been thoroughly explored for use in SOFC devices. In this study, a series of Fe-doped Gd2O3 with varying compositions were successfully synthesized to function as electrolytes for SOFCs. The as-prepared material, 10% Fe-doped Gd2O3 (Fe0.1Gd1.9O3), exhibited an excellent peak power density of 1352 mW/cm2 at 550 ℃, while the ionic conductivity reached 0.25 S cm−1. Various spectroscopic measurements, such as X-ray photoelectron spectroscopy, ultraviolet-visible (UV–vis) spectroscopy, and density functional theory calculations, were employed to understand the enhanced ion transportation mechanism and the improved performance of Fe-doped Gd2O3. The results showed that the Fe-doped Gd2O3 and energy bandgap tuning of electrolytes can significantly improve fuel cell performance at low temperatures, which is of great significance for the future development of low-temperature ceramic fuel cells.
AB - Considerable efforts have been made in the past several decades to search for electrolytes that can work at low temperatures for solid oxide fuel cells (SOFCs). The rare-earth oxide Gd2O3 is a thermodynamically stable semiconductor material, but it has not yet been thoroughly explored for use in SOFC devices. In this study, a series of Fe-doped Gd2O3 with varying compositions were successfully synthesized to function as electrolytes for SOFCs. The as-prepared material, 10% Fe-doped Gd2O3 (Fe0.1Gd1.9O3), exhibited an excellent peak power density of 1352 mW/cm2 at 550 ℃, while the ionic conductivity reached 0.25 S cm−1. Various spectroscopic measurements, such as X-ray photoelectron spectroscopy, ultraviolet-visible (UV–vis) spectroscopy, and density functional theory calculations, were employed to understand the enhanced ion transportation mechanism and the improved performance of Fe-doped Gd2O3. The results showed that the Fe-doped Gd2O3 and energy bandgap tuning of electrolytes can significantly improve fuel cell performance at low temperatures, which is of great significance for the future development of low-temperature ceramic fuel cells.
KW - Density functional theory
KW - Electrolyte
KW - Fe-doped GdO
KW - Ionic conductivity
KW - low-temperature SOFCs
UR - http://www.scopus.com/inward/record.url?scp=85156234681&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2023.142481
DO - 10.1016/j.electacta.2023.142481
M3 - 文章
AN - SCOPUS:85156234681
SN - 0013-4686
VL - 458
JO - Electrochimica Acta
JF - Electrochimica Acta
M1 - 142481
ER -