http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Low-temperature performance of yttria-stabilized zirconia prepared by atomic layer deposition
Jang, Dong Young,Kim, Ho Keun,Kim, Jun Woo,Bae, Kiho,Schlupp, Meike V.F.,Park, Suk Won,Prestat, Michel,Shim, Joon Hyung Elsevier 2015 Journal of Power Sources Vol.274 No.-
<P><B>Abstract</B></P> <P>We report on the performance of thin-film yttria-stabilized zirconia (YSZ) synthesized by atomic layer deposition (ALD) at temperatures of 50–525 °C. Electrochemical impedance spectroscopy (EIS) was used for conductivity measurements. Relatively high conductivity values were observed in the low-temperature region when compared to reference values of YSZ synthesized by other methods. To investigate the conduction mechanism, various experimental variables were modified during the electrical measurements, including the ratio of yttria to zirconia in the ALD YSZ films and the atmospheric conditions. To relate the electrical properties to the structural characteristics, the crystallinity and microstructure were investigated using transmission electron microscopy (TEM) and X-ray diffraction (XRD). Finally, the suitability of an ALD YSZ membrane as the electrolyte of micro solid oxide fuel cells was evaluated. An open circuit voltage of almost 1 V and decent power output were successfully measured below 100 °C.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Conductivity of ALD YSZ is greater than reference YSZ by several orders below 100 °C. </LI> <LI> Y<SUB>2</SUB>O<SUB>3</SUB> concentration of ALD YSZ and humidity are important in electrolyte performance. </LI> <LI> SOFCs with ALD YSZ mark OCVs close to 1 V and decent power below 100 °C. </LI> </UL> </P>