Article
Chemistry, Physical
Xiaoqiang Zhang, Mayken Espinoza, Tingshuai Li, Martin Andersson
Summary: This study developed a 3D single-channel multiphysics computational fluid dynamics model based on the finite element method to analyze the impact of decreased tortuosity on SOFC performance, with parametric sweep study revealing increased ionic current density and temperature with decreased tortuosity. The findings provide insights for better porous electrode design.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
O. Korjus, P. Moller, K. Kooser, T. Kaambre, O. Volobujeva, J. Nerut, S. Kotkas, E. Lust, G. Nurk
Summary: Ni-doping in LSCT fuel electrode significantly influences catalytic activity, stability, and cation mobility, leading to reduced polarization resistance, stabilized structure, suppressed element migration, and avoidance of key issues.
JOURNAL OF POWER SOURCES
(2021)
Article
Thermodynamics
Quanrong Fu, Zhiyi Li, Wei Wei, Fengxia Liu, Xiaofei Xu, Zhijun Liu
Summary: The study introduces a novel beam and slot interconnector (BSI) for SOFC, which improves power density and reduces various overpotentials compared to conventional interconnectors.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Physical
Sameer Osman, Khaled Ahmed, M. Nemattalla, Shinichi Ookawara, Mahmoud Ahmed
Summary: The performance of anode supported honeycomb solid-oxide fuel cells can be significantly enhanced by operating at higher temperatures. By using functionally graded electrodes, thermal stresses can be reduced to 85% less than conventional electrodes at elevated temperatures, leading to around 60% improvement in power density. Operating at higher temperatures can achieve the fuel cell's maximum power density with safe thermal stresses, making it attractive for applications requiring compact, reliable, and high-power devices based on fuel cell technology.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yousef Alizad Farzin, Alireza Babaei, Theis Loye Skafte, Eugen Stamate, Abolghasem Ataie, Soren Hojgaard Jensen
Summary: This paper evaluates the electrocatalytic activity of SFMM double perovskite as a substitute for the state-of-the-art Ni/YSZ fuel electrode and studies the electrochemical performance of SFMM/CGO composite electrode under different oxygen partial pressures. The results show that the catalytic activity of the electrode is improved with increasing oxygen partial pressure, demonstrating its potential application prospects.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Jingbo Ma, Mufu Yan, Yanxiang Zhang, Shaohua Qin
Summary: Solid oxide fuel cells (SOFCs) are promising electrochemical energy conversion devices that require modeling of mass transport for better understanding and design. By developing an analytical model to address the coupling issue, factors affecting SOFC performance can be studied to guide microstructure design.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Victor Zapata-Ramirez, Paula Rosendo-Santos, Ulises Amador, Clemens Ritter, Glenn C. Mather, Domingo Perez-Coll
Summary: Strontium-ferrite-based perovskites have been studied as cobalt-free cathodes for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The experimental results show that the spray-pyrolysed electrodes exhibit lower resistances and smaller grain sizes at 700°C compared to the electrodes synthesized by the Pechini method. Moreover, the spray-pyrolysed electrodes, especially the Mo-doped phase, demonstrate better stability after thermal cycling and ageing tests.
Review
Chemistry, Multidisciplinary
Jun Zhang, Sandrine Ricote, Peter Vang Hendriksen, Yunzhong Chen
Summary: Solid oxide fuel cells (SOFCs) are efficient electrochemical energy conversion devices that have the potential to become low cost. However, their high operating temperatures have hindered their widespread commercialization. This review summarizes the recent progress in developing materials to lower the operating temperature of SOFCs and discusses the new opportunities and challenges. The focus is on thin film SOFCs, sub-micrometer SOFCs based on microelectromechanical systems, and devices based on proton-conducting oxide electrolyte.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Dileep Maarisetty, Da-Ren Hang, Mitch M. C. Chou, Smrutiranjan Parida
Summary: In this study, a genre of trimetallic catalysts with Ni, Co, and Mo metals were synthesized, and it was found that the morphology, structure, and catalytic activity of the catalysts depend on the ratios of Ni/Co and Mo+4/Mo+5. The introduction of Mo as the third metal is only beneficial when the Ni/Co ratio is optimally maintained. Surface analysis and electrochemical tests revealed that Mo favors oxygen evolution reaction (OER) and metallic Ni on the surface promotes methanol oxidation reaction (MOR) activity. Furthermore, adsorbed water molecules were found to be crucial for enhancing the performance of the catalysts in both OER and MOR processes.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Haewon Seo, Masashi Kishimoto, Taishi Nakagawa, Hiroshi Iwai, Hideo Yoshida
Summary: The study elucidates how structural modifications at the mesoscale order can improve the electrochemical performance of anode-supported solid oxide fuel cells (SOFCs). By comparing experimental and simulation results, it is found that the mesoscale-modified cell with enlarged interfacial area and thickness inhomogeneity leads to nonuniform distributions of physicochemical quantities that contribute to electrochemical reactions. This nonuniform distribution, especially at high current densities, results in a significant decrease in ohmic loss and an overall higher cell performance in anode-supported SOFCs.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Yixing Li, Fabian Grimm, Juergen Karl
Summary: This paper presents an experimental study on the conversion of naphthalene on a single planar electrolyte-supported cell with varying temperature and naphthalene concentration. The incomplete conversion of naphthalene not only hinders the reforming of methane but also slows down the kinetics of electrochemical reaction. However, the produced hydrogen from steam reforming reaction still prevents Ni re-oxidation under higher fuel utilization in H2 gas mixture.
Article
Green & Sustainable Science & Technology
Alexander R. Hartwell, Cole A. Wilhelm, Thomas S. Welles, Ryan J. Milcarek, Jeongmin Ahn
Summary: The study investigates the impact of carbon monoxide and hydrogen concentration ratios on SOFC performance using simulated methane combustion exhaust as fuel and dilute hydrogen baseline tests. Results show that despite the involvement of complex reaction pathways, the presence of carbon monoxide leads to lower performance reductions compared to similarly dilute hydrogen gas.
Article
Chemistry, Physical
Long Q. Le, Charlie Meisel, Carolina H. Hernandez, Jake Huang, Youdong Kim, Ryan O'Hayre, Neal P. Sullivan
Summary: Proton-conducting ceramics play an important role in electrochemical electricity generation, energy storage, and fuels synthesis. The study finds that the durability of protonic-ceramic electrolyzers is superior to fuel cells. The introduction of an interlayer greatly reduces the degradation rate in both fuel cells and electrolyzers.
JOURNAL OF POWER SOURCES
(2022)
Article
Energy & Fuels
T. Tanaka, Y. Inui, G. Pongratz, V Subotic, C. Hochenauer
Summary: The authors developed a simulation program to study the operating characteristics of a single cell of industrial-sized solid oxide fuel cell (SOFC) under fuel gas leakage conditions, and proposed using the differential resistance as an evaluation index to detect fuel gas leakage.
Article
Chemistry, Physical
Samuel Koomson, Choong-Gon Lee
Summary: This work investigates the reaction characteristics of the anode and cathode by overpotential analyses in 100 cm2 class planar anode-supported SOFCs. The anodic overpotential is mainly caused by mass transfer-induced overpotentials of H2 and H2O species, while the cathodic overpotential is mainly caused by a deficiency of O2 species in the gas phase. Furthermore, gas flow rate and utilization are found to have significant effects on both anodic and cathodic overpotentials, indicating the importance of gas-phase mass transfer.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Dharmalingam Sivanesan, Umair H. Bhatti, Mm Hye Youn, Ki Tae Park, Hak Joo Kim, Andrews Nirmala Grace, Seung Hoon Choi, Soon Kwan Jeong
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2019)
Review
Environmental Sciences
Mi-Young Lee, Ki Tae Park, Wonhee Lee, Hyungseob Lim, Youngkook Kwon, Seoktae Kang
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Young Eun Kim, Wonhee Lee, Min Hye Youn, Soon Kwan Jeong, Hak Joo Kim, Ji Chan Park, Ki Tae Park
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Jumi Hong, Harim Kim, Ji Eun Lee, You Na Ko, Ki Tae Park, Young Eun Kim, Min Hye Youn, Soon Kwan Jeong, Jinwon Park, Wonhee Lee
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2020)
Article
Energy & Fuels
Dea Hyun Moon, Jun Eu, Wonhee Lee, Young Eun Kim, Ki Tae Park, You Na Ko, Soon Kwan Jeong, Min Hye Youn
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Daniel Tan, Wonhee Lee, Young Eun Kim, You Na Ko, Min Hye Youn, Ye Eun Jeon, Jumi Hong, Soon Kwan Jeong, Ki Tae Park
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Engineering, Environmental
Young Eun Kim, Beomil Kim, Wonhee Lee, You Na Ko, Min Hye Youn, Soon Kwan Jeong, Ki Tae Park, Jihun Oh
Summary: The study focuses on investigating Ag/TiO2 catalysts for electrochemical reduction of CO2 to syngas with a controllable H-2/CO ratio. By manipulating oxygen vacancies and phase differences of TiO2, a stable H-2/CO ratio was achieved with high Faradaic efficiency and partial current densities. The introduction of oxygen vacancy defects and phase changes in TiO2 influenced the H-2/CO ratio of the catalyst, showing promising results for syngas production.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Energy & Fuels
Kyoung Ho Song, Soon Kwan Jeong, Ki Tae Park, Kwan-Young Lee, Hak Joo Kim
Article
Chemistry, Multidisciplinary
Dea Hyun Moon, Arti Murnandari, Omotayo Salawu, Chan-Woo Lee, Wonhee Lee, Young Eun Kim, Ki Tae Park, Ji Eun Lee, Jun Eo, Soon Kwan Jeong, Min Hye Youn
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2020)
Article
Chemistry, Multidisciplinary
Sun-Mi Hwang, Song Yi Choi, Min Hye Youn, Wonhee Lee, Ki Tae Park, Kannan Gothandapani, Andrews Nirmala Grace, Soon Kwan Jeong
Article
Chemistry, Physical
Sung Eun Kim, Soon Kwan Jeong, Ki Tae Park, Kwan-Young Lee, Hak Joo Kim
Summary: This study investigates the performance of different carbonaceous materials as catalysts for catalytic methane decomposition (CMD). Carbon black (CB) showed better stability during the reaction, and a significant relationship between the number and type of oxygen-containing functional groups and methane conversion was found. The study discusses the effect of functional group type, activity origin, and deactivation mechanism on CMD.
CATALYSIS COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Jihun Oh, Ki Tae Park, Young Eun Kim, Wonhee Lee, You Na Ko, Jeong Eun Park, Daniel Tan, Jumi Hong, Ye Eun Jeon
Summary: This study investigates the high selectivity issue in the electrochemical CO2 reduction reaction (CO2RR) in liquid CO2-fed systems. By using different types and amounts of binders, the effects on the properties of gas diffusion electrodes (GDEs) were studied to modulate the CO2RR on Cu2O catalyst. The anion exchange ionomer FAA-3 showed high selectivity and electrode stability, while the cation exchange ionomer Nafion exhibited low electrode stability.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Review
Chemistry, Physical
Yeomin Kang, Taekyung Kim, Koo Young Jung, Ki Tae Park
Summary: The electrocatalytic CO2 reduction reaction (CO2RR) to formic acid has gained attention, but challenges remain in obtaining high-purity and high-concentration formic acid. A three-compartment reactor design with a solid-state electrolyte (SSE) is proposed to recover pure formic acid directly. This design utilizes anion exchange and cation exchange membranes to separate the anode and cathode compartments, and a high-conductivity SSE in the center compartment to minimize resistance. Studies have shown improved concentration and purity of formic acid using this reactor design. Further research is needed to scale up this technology for industrial applications.
Article
Engineering, Environmental
Young Eun Kim, Jeong Eun Park, Ju Hyeok Lee, Hyuk Choi, Wonhee Lee, You Na Ko, Hyun You Kim, Ki Tae Park
Summary: This study investigates the impact of silver decoration on the selectivity of Cu2O catalysts for C2+ production. The 10 Ag/Cu2O catalyst exhibits high Faradaic efficiency and partial current density for C2+ products, indicating that silver decoration effectively reduces the hydrogen evolution reaction and enhances the C-C coupling reaction for C2+ production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Jaeseo Lee, Wonhee Lee, Kyung Hwan Ryu, Joungho Park, Hyojin Lee, Jay H. Lee, Ki Tae Park
Summary: The study focuses on examining CO production performance using CF-ECO2R, which shows higher energy conversion efficiency and lower cell voltage compared to traditional methods. The developed mathematical model and techno-economic analyses suggest that the technology is feasible, economically competitive, and has the potential to reduce CO2 emissions significantly. Operating voltage of CF-ECO2R and regional factors strongly impact the cost and CO2 emissions of the system.