TY - JOUR
T1 - Effects of Nanoscale PEALD YSZ Interlayer for AAO Based Thin Film Solid Oxide Fuel Cells
AU - Cho, Gu Young
AU - Yu, Wonjong
AU - Lee, Yoon Ho
AU - Lee, Yeageun
AU - Tanveer, Waqas Hassan
AU - Kim, Yusung
AU - Lee, Sanghoon
AU - Cha, Suk Won
PY - 2020/3
Y1 - 2020/3
N2 - Performance of thin film solid oxide fuel cells (TF-SOFCs)
were improved by inserting plasma enhanced atomic layer deposition (PEALD) of
yttira-stabilized zirconia (YSZ) interlayers. By controlling the ratio between
Y2O3 and ZrO2 in YSZ deposition supercycles, Y2O3
mol.% in YSZ films were changed. High Y2O3 contained
PEALD YSZ interlayered cell showed higher maximum power density (123.6 mW/cm2
at 500°C, 286.1 mW/cm2 at 550°C) and smaller polarization resistance
compared with reference Y2O3 concentrated PEALD YSZ
interlayer cell. (108.5mW/cm2 at 500 C, 181.1 mW/cm2
at 550 C) Exchange current densities of TF-SOFCs at 500 C also
improved ~ 59.3% at high Y2O3 concentrated PEALD YSZ
interlayer cells. These phenomena caused by high density of oxygen vacancies in
high Y2O3 concentrated PEALD YSZ interlayer, which helps
oxygen incorporation reactions at cathode-interlayer interface. Therefore,
cathodic polarization loss related with oxygen reduction reactions was
decreased, and then, performance and exchange current density were improved.
Results of this study imply that insertion of simple PEALD YSZ interlayer at
cathode-electrolyte interface efficiently improves performance and
electrochemical characteristics of TF-SOFCs.
AB - Performance of thin film solid oxide fuel cells (TF-SOFCs)
were improved by inserting plasma enhanced atomic layer deposition (PEALD) of
yttira-stabilized zirconia (YSZ) interlayers. By controlling the ratio between
Y2O3 and ZrO2 in YSZ deposition supercycles, Y2O3
mol.% in YSZ films were changed. High Y2O3 contained
PEALD YSZ interlayered cell showed higher maximum power density (123.6 mW/cm2
at 500°C, 286.1 mW/cm2 at 550°C) and smaller polarization resistance
compared with reference Y2O3 concentrated PEALD YSZ
interlayer cell. (108.5mW/cm2 at 500 C, 181.1 mW/cm2
at 550 C) Exchange current densities of TF-SOFCs at 500 C also
improved ~ 59.3% at high Y2O3 concentrated PEALD YSZ
interlayer cells. These phenomena caused by high density of oxygen vacancies in
high Y2O3 concentrated PEALD YSZ interlayer, which helps
oxygen incorporation reactions at cathode-interlayer interface. Therefore,
cathodic polarization loss related with oxygen reduction reactions was
decreased, and then, performance and exchange current density were improved.
Results of this study imply that insertion of simple PEALD YSZ interlayer at
cathode-electrolyte interface efficiently improves performance and
electrochemical characteristics of TF-SOFCs.
U2 - 10.1007/s40684-019-00082-9
DO - 10.1007/s40684-019-00082-9
M3 - Article
SN - 2288-6206
VL - 7
SP - 423
EP - 430
JO - International Journal of Precision Engineering and Manufacturing-Green Technology
JF - International Journal of Precision Engineering and Manufacturing-Green Technology
ER -