This page has only limited features, please log in for full access.
Yanhai Du; Dhruba Panthi; Sulata Sahu; Hai Feng; Patrick Baker. Design and 3D Printing of Controllable and Gradient Porous Supports for Solid Oxide Fuel Cells. ECS Meeting Abstracts 2021, MA2021-03, 17 -17.
AMA StyleYanhai Du, Dhruba Panthi, Sulata Sahu, Hai Feng, Patrick Baker. Design and 3D Printing of Controllable and Gradient Porous Supports for Solid Oxide Fuel Cells. ECS Meeting Abstracts. 2021; MA2021-03 (1):17-17.
Chicago/Turabian StyleYanhai Du; Dhruba Panthi; Sulata Sahu; Hai Feng; Patrick Baker. 2021. "Design and 3D Printing of Controllable and Gradient Porous Supports for Solid Oxide Fuel Cells." ECS Meeting Abstracts MA2021-03, no. 1: 17-17.
Sulata Sahu; Dhruba Panthi; Hai Feng; Yanhai Du. Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance. ECS Meeting Abstracts 2021, MA2021-03, 208 -208.
AMA StyleSulata Sahu, Dhruba Panthi, Hai Feng, Yanhai Du. Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance. ECS Meeting Abstracts. 2021; MA2021-03 (1):208-208.
Chicago/Turabian StyleSulata Sahu; Dhruba Panthi; Hai Feng; Yanhai Du. 2021. "Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance." ECS Meeting Abstracts MA2021-03, no. 1: 208-208.
Yanhai Du; Dhruba Panthi; Hai Feng. Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications. ECS Meeting Abstracts 2021, MA2021-03, 29 -29.
AMA StyleYanhai Du, Dhruba Panthi, Hai Feng. Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications. ECS Meeting Abstracts. 2021; MA2021-03 (1):29-29.
Chicago/Turabian StyleYanhai Du; Dhruba Panthi; Hai Feng. 2021. "Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications." ECS Meeting Abstracts MA2021-03, no. 1: 29-29.
Hai Feng; Dhruba Panthi; Yanhai Du. Improving Current Collection of Tubular Solid Oxide Fuel Cells. ECS Meeting Abstracts 2021, MA2021-03, 18 -18.
AMA StyleHai Feng, Dhruba Panthi, Yanhai Du. Improving Current Collection of Tubular Solid Oxide Fuel Cells. ECS Meeting Abstracts. 2021; MA2021-03 (1):18-18.
Chicago/Turabian StyleHai Feng; Dhruba Panthi; Yanhai Du. 2021. "Improving Current Collection of Tubular Solid Oxide Fuel Cells." ECS Meeting Abstracts MA2021-03, no. 1: 18-18.
Yanhai Du; Dhruba Panthi; Hai Feng. Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications. ECS Transactions 2021, 103, 179 -184.
AMA StyleYanhai Du, Dhruba Panthi, Hai Feng. Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications. ECS Transactions. 2021; 103 (1):179-184.
Chicago/Turabian StyleYanhai Du; Dhruba Panthi; Hai Feng. 2021. "Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications." ECS Transactions 103, no. 1: 179-184.
Sulata Sahu; Dhruba Panthi; Hai Feng; Yanhai Du. Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance. ECS Transactions 2021, 103, 407 -418.
AMA StyleSulata Sahu, Dhruba Panthi, Hai Feng, Yanhai Du. Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance. ECS Transactions. 2021; 103 (1):407-418.
Chicago/Turabian StyleSulata Sahu; Dhruba Panthi; Hai Feng; Yanhai Du. 2021. "Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance." ECS Transactions 103, no. 1: 407-418.
Hai Feng; Dhruba Panthi; Yanhai Du. Improving Current Collection of Tubular Solid Oxide Fuel Cells. ECS Transactions 2021, 103, 83 -92.
AMA StyleHai Feng, Dhruba Panthi, Yanhai Du. Improving Current Collection of Tubular Solid Oxide Fuel Cells. ECS Transactions. 2021; 103 (1):83-92.
Chicago/Turabian StyleHai Feng; Dhruba Panthi; Yanhai Du. 2021. "Improving Current Collection of Tubular Solid Oxide Fuel Cells." ECS Transactions 103, no. 1: 83-92.
Precise porosity control is highly desirable for improving the electrochemical performance of solid oxide fuel cells (SOFCs). Freeze casting is an established method for enabling high bulk porosity in structures and controlling pore orientation. In this study, freeze casting was used to fabricate tubular, anode-supported SOFCs with aligned and varying amounts of porosity by controlling the solids/water ratio in different casting slurries. SOFCs were prepared with a Ni/yttria and scandia stabilized zirconia (ScYSZ) anode support (AS), an anode functional layer (AFL), a ScYSZ electrolyte, a lanthanum strontium manganite (LSM)/ScYSZ cathode interlayer (CIL), and an LSM cathode. The permeability of the anode support was found to increase from 1.4 × 10−2 to 1.8 × 10−2 m2 as porosity was increased from 57 to 64 vol%, while the total cell resistance decreased by 35% from 0.93 to 0.60 Ohm cm2. When evaluated with 30 vol% H2 as the fuel at 800 °C, the decrease of concentration polarization enabled an increase in electrochemical performance by 42% from 0.35 to 0.50 W/cm2 as the porosity in the anode support was increased. Mechanical strength characterization using a three-point method showed there is a practical upper limit of the amount of porosity that can be designed into the anode support. This work paves a way for controlling porosity by freeze casting and understanding the correlation between porosity and concentration polarization losses in SOFCs.
Benjamin Emley; Dhruba Panthi; Yanhai Du; Yan Yao. Controlling Porosity of Anode Support in Tubular Solid Oxide Fuel Cells by Freeze Casting. Journal of Electrochemical Energy Conversion and Storage 2020, 17, 1 -31.
AMA StyleBenjamin Emley, Dhruba Panthi, Yanhai Du, Yan Yao. Controlling Porosity of Anode Support in Tubular Solid Oxide Fuel Cells by Freeze Casting. Journal of Electrochemical Energy Conversion and Storage. 2020; 17 (4):1-31.
Chicago/Turabian StyleBenjamin Emley; Dhruba Panthi; Yanhai Du; Yan Yao. 2020. "Controlling Porosity of Anode Support in Tubular Solid Oxide Fuel Cells by Freeze Casting." Journal of Electrochemical Energy Conversion and Storage 17, no. 4: 1-31.
Freeze casting is an established method for fabricating porous ceramic structures with controlled porosity and pore geometries. Herein, we developed a novel freeze casting and freeze drying process to fabricate tubular anode supports for solid oxide fuel cells (SOFCs). Freeze casting was performed by injecting aqueous anode slurry to a dual‐purpose freeze casting and freeze drying mold wrapped with peripheral coils for flowing a coolant. With the use of an ice barrier layer, proper control of the experimental setup, and adjustments in the drying temperature profile, complete drying of the individual anode tubes was achieved in four hours. The freeze‐cast anode tubes contained radially aligned columnar pore channels, thus significantly enhancing the gaseous diffusion. SOFC single cells with conventional Ni/yttria‐stabilized zirconia (YSZ)/strontium‐doped lanthanum manganite (LSM) materials were prepared by dip coating the thin functional layers onto the anode support. Single‐cell tests showed that the concentration polarization was low owing to the highly porous anode support with directional pores. With H2/N2 (1:1) fuel, maximum power densities of 0.47, 0.36, and 0.27 W/cm2 were recorded at 800, 750, and 700 °C, respectively. Our results demonstrate the feasibility of using freeze casting to obtain tubular SOFCs with desired microstructures and fast turn‐around times. This article is protected by copyright. All rights reserved.
Dhruba Panthi; Nader Hedayat; Theo Woodson; Benjamin J. Emley; Yanhai Du. Tubular solid oxide fuel cells fabricated by a novel freeze casting method. Journal of the American Ceramic Society 2019, 103, 878 -888.
AMA StyleDhruba Panthi, Nader Hedayat, Theo Woodson, Benjamin J. Emley, Yanhai Du. Tubular solid oxide fuel cells fabricated by a novel freeze casting method. Journal of the American Ceramic Society. 2019; 103 (2):878-888.
Chicago/Turabian StyleDhruba Panthi; Nader Hedayat; Theo Woodson; Benjamin J. Emley; Yanhai Du. 2019. "Tubular solid oxide fuel cells fabricated by a novel freeze casting method." Journal of the American Ceramic Society 103, no. 2: 878-888.
Electron doping-induced structure modification of double-perovskite anode material with enhanced electrocatalytic activities for methane oxidation in solid oxide fuel cells.
Xin Yang; Jing Chen; Dhruba Panthi; Bingbing Niu; Libin Lei; Zhihao Yuan; Yanhai Du; Yongfeng Li; Fanglin Frank Chen; Tianmin He. Electron doping of Sr2FeMoO6−δ as high performance anode materials for solid oxide fuel cells. Journal of Materials Chemistry A 2018, 7, 733 -743.
AMA StyleXin Yang, Jing Chen, Dhruba Panthi, Bingbing Niu, Libin Lei, Zhihao Yuan, Yanhai Du, Yongfeng Li, Fanglin Frank Chen, Tianmin He. Electron doping of Sr2FeMoO6−δ as high performance anode materials for solid oxide fuel cells. Journal of Materials Chemistry A. 2018; 7 (2):733-743.
Chicago/Turabian StyleXin Yang; Jing Chen; Dhruba Panthi; Bingbing Niu; Libin Lei; Zhihao Yuan; Yanhai Du; Yongfeng Li; Fanglin Frank Chen; Tianmin He. 2018. "Electron doping of Sr2FeMoO6−δ as high performance anode materials for solid oxide fuel cells." Journal of Materials Chemistry A 7, no. 2: 733-743.
Yttria-stabilized zirconia (YSZ) is the most common electrolyte material for solid oxide fuel cells. Herein, we conducted a comparative study on the densification behavior of three different kinds of commercial 8 mol% YSZ powders: (i) TZ-8Y (Tosoh, Japan), (ii) MELox 8Y (MEL Chemicals, UK), and (iii) YSZ-HT (Huatsing Power, China). The comparison was made on both the self- supporting pellets and thin-film electrolytes coated onto a NiO–YSZ anode support. For the pellets, MELox 8Y showed the highest densification at lower sintering temperatures with 93% and 96% of the theoretical density at 1250 and 1300 °C, respectively. Although YSZ-HT showed a higher sintering rate than TZ-8Y, a sintering temperature of 1350 °C was required for both the powders to reach 95% of the theoretical density. For the thin-film electrolytes, on the other hand, YSZ-HT showed the highest sintering rate with a dense microstructure at a co-sintering temperature of 1250 °C. Our results indicate that besides the average particle size, other factors such as particle size distribution and post-processing play a significant role in determining the sintering rate and densification behavior of the YSZ powders. Additionally, a close match in the sintering shrinkage of the electrolyte and anode support is important for facilitating the densification of the thin-film electrolytes.
Dhruba Panthi; Nader Hedayat; Yanhai Du. Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes. Journal of Advanced Ceramics 2018, 7, 325 -335.
AMA StyleDhruba Panthi, Nader Hedayat, Yanhai Du. Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes. Journal of Advanced Ceramics. 2018; 7 (4):325-335.
Chicago/Turabian StyleDhruba Panthi; Nader Hedayat; Yanhai Du. 2018. "Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes." Journal of Advanced Ceramics 7, no. 4: 325-335.
Inert substrate-supported microtubular solid oxide fuel cells (MT-SOFCs) are attractive due to their advantages, including high reduction–oxidation (redox) cycling stability and thermal cycling tolerance. A method involving sequential dip-coating, leaching, and co-sintering was developed and applied to fabricate inert substrate-supported MT-SOFCs through acid leaching nickel from the conventional Ni–yttria-stabilized zirconia (YSZ) anode. A thin current collector was deposited onto the support surface to minimize the current collection losses by collecting current from the entire surface area of the anode. A dense electrolyte could be obtained at a co-sintering temperature of 1250 °C. The produced MT-SOFC with the configuration of porous zirconia support/Ni–Scandia-stabilized zirconia (SSZ) anode current collector/Ni-SSZ anode/SSZ electrolyte/strontium-doped lanthanum manganite (LSM)-SSZ cathode/LSM cathode current collector was evaluated by electrochemical characterization tests. The inert substrate-supported MT-SOFC exhibited the maximum power densities of 616, 542, 440, and 300 mW cm−2 at 800, 750, 700, and 650 °C, respectively using dry hydrogen and air. In addition, the thermal cycling stability of the MT-SOFC was evaluated. The cell survived from thermal cycling tests and came out intact after 50 thermal cycles between 700 °C and 400 °C during an operation time of 50 h.
Nader Hedayat; Dhruba Panthi; Yanhai Du. Inert substrate-supported microtubular solid oxide fuel cells based on highly porous ceramic by low-temperature co-sintering. Ceramics International 2018, 45, 579 -587.
AMA StyleNader Hedayat, Dhruba Panthi, Yanhai Du. Inert substrate-supported microtubular solid oxide fuel cells based on highly porous ceramic by low-temperature co-sintering. Ceramics International. 2018; 45 (1):579-587.
Chicago/Turabian StyleNader Hedayat; Dhruba Panthi; Yanhai Du. 2018. "Inert substrate-supported microtubular solid oxide fuel cells based on highly porous ceramic by low-temperature co-sintering." Ceramics International 45, no. 1: 579-587.
Freeze-casting, also called ice-templating, is a promising method to produce hierarchically porous ceramics with aligned and directional pores. Additionally, freeze-casting offers strict control over the pore sizes, the percentage of porosity, and morphology evolution. This method has found a wide range of applications. For instance, freeze-casting has emerged as a promising strategy to overcome the gas diffusion limitation through solid oxide fuel cell (SOFC) electrodes and to generate high power density. Firstly, the freeze-casting method, processing steps, and characteristics of the freeze-cast structures are presented. The effect of processing parameters including freezing conditions, solids loading and additives on the microstructure is reviewed. This article includes the developed processing routes and derived porous structures for fabricating both planar and tubular SOFCs through the freeze-casting method. Finally, discussions regarding applications are provided and suggestions for future investigations on the processing of freeze-cast electrodes and scaffolds for SOFCs are proposed.
Yanhai Du; Nader Hedayat; Dhruba Panthi; Hoda Ilkhani; Benjamin J. Emley; Theo Woodson. Freeze-casting for the fabrication of solid oxide fuel cells: A review. Materialia 2018, 1, 198 -210.
AMA StyleYanhai Du, Nader Hedayat, Dhruba Panthi, Hoda Ilkhani, Benjamin J. Emley, Theo Woodson. Freeze-casting for the fabrication of solid oxide fuel cells: A review. Materialia. 2018; 1 ():198-210.
Chicago/Turabian StyleYanhai Du; Nader Hedayat; Dhruba Panthi; Hoda Ilkhani; Benjamin J. Emley; Theo Woodson. 2018. "Freeze-casting for the fabrication of solid oxide fuel cells: A review." Materialia 1, no. : 198-210.
Xin Yang; Dhruba Panthi; Nader Hedayat; Tianmin He; Fanglin Chen; Wanbing Guan; Yanhai Du. Molybdenum dioxide as an alternative catalyst for direct utilization of methane in tubular solid oxide fuel cells. Electrochemistry Communications 2018, 86, 126 -129.
AMA StyleXin Yang, Dhruba Panthi, Nader Hedayat, Tianmin He, Fanglin Chen, Wanbing Guan, Yanhai Du. Molybdenum dioxide as an alternative catalyst for direct utilization of methane in tubular solid oxide fuel cells. Electrochemistry Communications. 2018; 86 ():126-129.
Chicago/Turabian StyleXin Yang; Dhruba Panthi; Nader Hedayat; Tianmin He; Fanglin Chen; Wanbing Guan; Yanhai Du. 2018. "Molybdenum dioxide as an alternative catalyst for direct utilization of methane in tubular solid oxide fuel cells." Electrochemistry Communications 86, no. : 126-129.
Nader Hedayat; Dhruba Panthi; Yanhai Du. Fabrication of anode-supported microtubular solid oxide fuel cells by sequential dip-coating and reduced sintering steps. Electrochimica Acta 2017, 258, 694 -702.
AMA StyleNader Hedayat, Dhruba Panthi, Yanhai Du. Fabrication of anode-supported microtubular solid oxide fuel cells by sequential dip-coating and reduced sintering steps. Electrochimica Acta. 2017; 258 ():694-702.
Chicago/Turabian StyleNader Hedayat; Dhruba Panthi; Yanhai Du. 2017. "Fabrication of anode-supported microtubular solid oxide fuel cells by sequential dip-coating and reduced sintering steps." Electrochimica Acta 258, no. : 694-702.
This study presents preliminary results for tubular anode-supported solid oxide fuel cells (SOFCs) fabricated by a novel method based on tape casting. A multilayer tape cast was prepared by successive casting of the anode support, anode functional layer, and electrolyte. The tape cast was rolled into a tube, and the ends of the tape were joined by solvent-assisted lamination. The sample was co-fired at 1400°C, followed by screen printing and sintering of the cathode at 1150°C. The electrochemical performance of the tubular cell was evaluated in N2/H2 gas at 750°C. The cell generated a maximum power density of 90 mW/cm2. The scanning electron microscope (SEM) micrographs after the electrochemical tests confirmed that the solvent-assisted lamination resulted in stable joining without delamination. Although the process and performance have yet to be optimized, the use of multilayer tape casting, solvent-assisted lamination, and co-firing is expected to make this method advantageous for low-cost mass production of tubular SOFCs.
Nader Hedayat; Dhruba Panthi; Yanhai Du. Fabrication of tubular solid oxide fuel cells by solvent-assisted lamination and co-firing a rolled multilayer tape cast. International Journal of Applied Ceramic Technology 2017, 15, 307 -314.
AMA StyleNader Hedayat, Dhruba Panthi, Yanhai Du. Fabrication of tubular solid oxide fuel cells by solvent-assisted lamination and co-firing a rolled multilayer tape cast. International Journal of Applied Ceramic Technology. 2017; 15 (2):307-314.
Chicago/Turabian StyleNader Hedayat; Dhruba Panthi; Yanhai Du. 2017. "Fabrication of tubular solid oxide fuel cells by solvent-assisted lamination and co-firing a rolled multilayer tape cast." International Journal of Applied Ceramic Technology 15, no. 2: 307-314.
Dhruba Panthi; Bokkyu Choi; Yanhai Du; Atsushi Tsutsumi. Lowering the co-sintering temperature of cathode–electrolyte bilayers for micro-tubular solid oxide fuel cells. Ceramics International 2017, 43, 10698 -10707.
AMA StyleDhruba Panthi, Bokkyu Choi, Yanhai Du, Atsushi Tsutsumi. Lowering the co-sintering temperature of cathode–electrolyte bilayers for micro-tubular solid oxide fuel cells. Ceramics International. 2017; 43 (14):10698-10707.
Chicago/Turabian StyleDhruba Panthi; Bokkyu Choi; Yanhai Du; Atsushi Tsutsumi. 2017. "Lowering the co-sintering temperature of cathode–electrolyte bilayers for micro-tubular solid oxide fuel cells." Ceramics International 43, no. 14: 10698-10707.
We compared the densification behavior of three different types of 8 mol% yttria-stabilized zirconia (YSZ) powders used as the electrolyte for solid oxide fuel cells (SOFCs): (i) TZ-8Y from Tosoh (Japan), (ii) MELox 8Y from MEL Chemicals (UK), and (iii) YSZ-HT from Huatsing Power (China). The YSZ powders were pressed to form disc-shaped pellets that were sintered at different temperatures ranging 1200–1400 °C. Among the three YSZ powders, MELox 8Y showed the best densification behavior at lower sintering temperatures with 93 and 96% of the theoretical density at 1250 and 1300 °C, respectively. Although YSZ-HT showed higher sintering rate than TZ-8Y, a sintering temperature of 1350 °C was required for both the powders to reach a theoretical density ≥95%. Our results indicate that different factors besides the particle size play a significant role in determining the sintering rate and densification behavior of the YSZ electrolyte.
Dhruba Panthi; Nader Hedayat; Yanhai Du. A Comparative Study on the Densification Behavior of Yttria-Stabilized Zirconia Electrolyte Powders. ECS Transactions 2017, 78, 327 -334.
AMA StyleDhruba Panthi, Nader Hedayat, Yanhai Du. A Comparative Study on the Densification Behavior of Yttria-Stabilized Zirconia Electrolyte Powders. ECS Transactions. 2017; 78 (1):327-334.
Chicago/Turabian StyleDhruba Panthi; Nader Hedayat; Yanhai Du. 2017. "A Comparative Study on the Densification Behavior of Yttria-Stabilized Zirconia Electrolyte Powders." ECS Transactions 78, no. 1: 327-334.
Bokkyu Choi; Dhruba Panthi; Masateru Nakoji; Kaduo Tsutsumi; Atsushi Tsutsumi. Design and performance evaluation of a novel 1 kW-class hydrogen production/power generation system. Applied Energy 2017, 194, 296 -303.
AMA StyleBokkyu Choi, Dhruba Panthi, Masateru Nakoji, Kaduo Tsutsumi, Atsushi Tsutsumi. Design and performance evaluation of a novel 1 kW-class hydrogen production/power generation system. Applied Energy. 2017; 194 ():296-303.
Chicago/Turabian StyleBokkyu Choi; Dhruba Panthi; Masateru Nakoji; Kaduo Tsutsumi; Atsushi Tsutsumi. 2017. "Design and performance evaluation of a novel 1 kW-class hydrogen production/power generation system." Applied Energy 194, no. : 296-303.
Bokkyu Choi; Dhruba Panthi; Masateru Nakoji; Toshiki Kabutomori; Kaduo Tsutsumi; Atsushi Tsutsumi. A novel water-splitting electrochemical cycle for hydrogen production using an intermediate electrode. Chemical Engineering Science 2017, 157, 200 -208.
AMA StyleBokkyu Choi, Dhruba Panthi, Masateru Nakoji, Toshiki Kabutomori, Kaduo Tsutsumi, Atsushi Tsutsumi. A novel water-splitting electrochemical cycle for hydrogen production using an intermediate electrode. Chemical Engineering Science. 2017; 157 ():200-208.
Chicago/Turabian StyleBokkyu Choi; Dhruba Panthi; Masateru Nakoji; Toshiki Kabutomori; Kaduo Tsutsumi; Atsushi Tsutsumi. 2017. "A novel water-splitting electrochemical cycle for hydrogen production using an intermediate electrode." Chemical Engineering Science 157, no. : 200-208.