http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Waqas Hassan Tanveer,지상훈,유원종,차석원 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
Electrolyte thin films of yttria-stabilized- zirconia (YSZ) for low temperature solid oxide fuel cell applications are investigated. Films of same thickness and composition are fabricated by using two distinct thin film deposition techniques, atomic layer deposition (ALD) and radio frequency (RF) sputtering. Scanning electron microscopic images indicate that both methods form uniform, polycrystalline films on amorphous matrix. Deposition rates of ALD and sputtered YSZ electrolyte films are easily controllable. In-plane ionic conductivity of O2- ions for YSZ is measured using electrochemical impedance spectroscopy. Experimental results show that, at a low temperature of 250°C, ALD YSZ thin films exhibit considerably lower resistance to the conduction of oxygen ions as compared to the sputtered films. This lower resistance results in better ionic conductivity of ALD YSZ thin films.
Tanveer, Waqas Hassan,Ji, Sanghoon,Yu, Wonjong,Cha, Suk Won Korean Society for Precision Engineering 2015 International Journal of Precision Engineering and Vol.16 No.10
Electrolyte thin films of yttria-stabilized- zirconia (YSZ) for low temperature solid oxide fuel cell applications are investigated. Films of same thickness and composition are fabricated by using two distinct thin film deposition techniques, atomic layer deposition (ALD) and radio frequency (RF) sputtering. Scanning electron microscopic images indicate that both methods form uniform, polycrystalline films on amorphous matrix. Deposition rates of ALD and sputtered YSZ electrolyte films are easily controllable. In-plane ionic conductivity of <TEX>$O^{2-}$</TEX> ions for YSZ is measured using electrochemical impedance spectroscopy. Experimental results show that, at a low temperature of <TEX>$250^{\circ}C$</TEX>, ALD YSZ thin films exhibit considerably lower resistance to the conduction of oxygen ions as compared to the sputtered films. This lower resistance results in better ionic conductivity of ALD YSZ thin films.
Waqas Hassan Tanveer,Sang-Hoon Ji,유원종,Gu Young Cho,이윤호,박태현,Yaegeun Lee,Yusung Kim,Suk Won Cha 한국물리학회 2016 Current Applied Physics Vol.16 No.12
We prepared nickel-samaria-doped-ceria cermet anodes for intermediate temperature solid oxide fuel cells, by using two different background sputtering gases. One is a reactive mixture gas of pure argon and oxygen (Ar/O2:80/20), and other is non-reactive pure argon gas. For all cells, a 150 mm fully stabilized scandia-stabilized-zirconia pellet was used as an electrolyte support. Lanthanum strontium manganite ink was screen-printed on the electrolyte support to act as a cathode. Initial results showed that the anodes produced by non-reactive background sputtering gas, outperformed the anodes produced by reactive mixture background gas in all categories of performance and also showed lesser agglomeration with time.
Tanveer, Waqas Hassan,Ji, Sanghoon,Yu, Wonjong,Cho, Gu Young,Lee, Yoon Ho,Cha, Suk Won American Scientific Publishers 2015 Journal of Nanoscience and Nanotechnology Vol.15 No.11
<P> We investigated the effects of the insertion of a gadolinium-doped ceria (GDC) anodic functional layer (AFL) on the electrochemical performance of intermediate-temperature solid-oxide fuel cells (SOFCs). Fully stabilized yttria-stabilized zirconia (YSZ) was used as an oxygen-ion-conducting and support material. Nickel-Samaria-doped ceriathin film was used as an anode material, while screen-printed lanthanum strontium magnetite served as a cathode material. In order to enhance the interfacial reaction on the anode side, a GDC-AFL with a thickness of about 140 nm, deposited via radio-frequency sputtering, was inserted into the anode-electrolyte interface. SOFCs with and without a GDC-AFL were electrochemically characterized. In an intermediate temperature range of about 700 ∼ 800 °C, the application of the GDC-AFL led to an increase in the peak power density of approximately 16%. </P>
Tanveer, Waqas Hassan,Iwai, Hiroshi,Yu, Wonjong,Pandiyan, Arunkumar,Ji, Sanghoon,Lee, Yoon Ho,Lee, Yeageun,Yaqoob, Khurram,Cho, Gu Young,Cha, Suk Won The Royal Society of Chemistry 2018 Journal of Materials Chemistry A Vol.6 No.24
<P>Nickel-Samaria Doped Ceria (Ni-SDC) cermet anodic thin films of about 500 nm were prepared on Scandia Stabilized Zirconia (ScSZ) electrolyte supports <I>via</I> reactive radio frequency (RF) sputtering. Anode deposition was done at room temperature, and the background sputtering gas was a reactive mixture of Ar : O2/80 : 20. The oxide conducting fuel cell configuration was completed by screen printing of lanthanum strontium manganite (LSM/YSZ) cathodes on the other side of the ScSZ supports. High resolution transmission electron microscopy (HR-TEM) of the cermet anode revealed an arranged nanostructure, with patterned ceria enclosing the nickel molecules in porous media. These highly ordered anodes were tested under (i) H2 and (ii) a product fuel of CO2 electro-reduced <I>via</I> industrial waste carbon (IWC). IWC fuel performance matched the H2 fuel performance in terms of peak power density and longevity, with an added lower fuel cost advantage. HR-TEM and scanning electron microscope (SEM) 2D images were utilized to simulate the reaction kinetics of the nanostructured porous thin film cermet anode. The reported high electrochemical performance was proved to result from the high density of triple-phase boundaries, arranged nanostructure and high contiguity of the special design of the nano-anodes. Experimental and simulation results were coherent with each other, especially for IWC operated SOFCs working at or above 700 °C.</P>
Tanveer, Waqas Hassan,Ji, Sanghoon,Yu, Wonjong,Cho, Gu Young,Lee, Yoon Ho,Park, Taehyun,Lee, Yeageun,Kim, Yusung,Cha, Suk Won Elsevier 2016 CURRENT APPLIED PHYSICS Vol.16 No.12
<P>We prepared nickel-samaria-doped-ceria cermet anodes for intermediate temperature solid oxide fuel cells, by using two different background sputtering gases. One is a reactive mixture gas of pure argon and oxygen (Ar/O2:80/20), and other is non-reactive pure argon gas. For all cells, a 150 mu m fully stabilized scandia-stabilized-zirconia pellet was used as an electrolyte support. Lanthanum strontium manganite ink was screen-printed on the electrolyte support to act as a cathode. Initial results showed that the anodes produced by non-reactive background sputtering gas, outperformed the anodes produced by reactive mixture background gas in all categories of performance and also showed lesser agglomeration with time. (C) 2016 Elsevier B. V. All rights reserved.</P>