Article
Energy & Fuels
Ben Ge, Panpan Zhang, Zeyang Wang, Junjie Zhou, Zhaowen Wang, Yi Guo, Zhibin Yang
Summary: By doping Nb and Sr in LaFeO3, the performance of the fuel electrode in Solid Oxide Electrolysis Cell (SOEC) is improved. LSFN exhibits excellent stability and high performance as a fuel electrode, achieving high current density at different compositions and temperatures. LSFN is a highly efficient and stable fuel electrode for SOEC applications.
Article
Chemistry, Physical
Jihao Zhang, Libin Lei, Hangyue Li, Kaihua Sun, Zaihong Sun, Minfang Han
Summary: High fuel utilization rate is crucial for achieving high power generation efficiency in solid oxide fuel cells, but severe concentration polarization poses a challenge to cell performance. Cell resistance is a more suitable and robust criterion for limiting current behavior, and setting a resistance threshold can help maintain safe operating status, especially for industrial SOFCs. The stable relationship between high reactant utilization rate and limiting current behavior provides valuable information for fuel sensitivity analysis.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Naizhi Li, Mengmeng Wang, Qing Shen, Yue Teng, Di Wang, Chusheng Chen, Zhongliang Zhan
Summary: By optimizing the pore structure of the cathodes, concentration polarization can be reduced and steam conversion efficiency can be improved in solid oxide electrolysis cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
E. Da Rosa Silva, G. Sassone, M. Prioux, M. Hubert, B. Morel, J. Laurencin
Summary: A physical-based model has been developed and validated to understand the relationship between solid oxide cell response and electrode reaction mechanisms. This model combines three length-scale modules to compute reaction rates, current densities, and gas composition. An experimental setup was developed to measure local polarization curves and showed good agreement with simulated data. The validated model was used to analyze cell operation in electrolysis and fuel cell modes, investigating the activated reaction pathways along the cell length.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Quanrong Fu, Zhiyi Li, Wei Wei, Fengxia Liu, Xiaofei Xu, Zhijun Liu
Summary: This study presents a novel interconnector design, named groove and rib-finned interconnector, to improve the performance of planar solid oxide fuel cell (SOFC) by enhancing fuel utilization and output power density. The novel interconnector increases reactant gas velocity and vorticity, eliminates oxygen-free zone, reduces overpotentials, and improves the electrical performance of the SOFC stack.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Masashi Kishimoto, Yuya Tanimura, Haewon Seo, Hiroshi Iwai, Hideo Yoshida
Summary: This study investigates the electrochemical performance of solid oxide cells (SOCs) under fuel cell and electrolyzer operations. It is found that the asymmetry between the two operation modes is mainly due to the behavior of the hydrogen electrode. The activation and concentration overpotentials show asymmetric behavior at high current densities. The non-identical charge-transfer coefficients in the Butler-Volmer equation and the non-uniform gas concentration formed in the hydrogen electrode contribute to the asymmetry in the activation overpotential, while the non-equimolar counter diffusion of hydrogen and steam caused by Knudsen diffusion is associated with the asymmetry in the concentration overpotential.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Zhufeng Ouyang, Yosuke Komatsu, Anna Sciazko, Junya Onishi, Katsuhiko Nishimura, Naoki Shikazono
Summary: The microstructure instability of nickel-stabilized zirconia fuel electrode in solid oxide fuel cells (SOFCs) and solid oxide electrolysis cells (SOECs) is a challenge for commercialization. In this study, operando observations were conducted to study the mobility of nickel on the YSZ surface under different operation modes. The results showed that nickel phase dynamically spreads and splits up only under the SOFC mode, while this phenomenon is not observed under the SOEC mode. Nickel coarsening occurs regardless of the operation mode.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Xiaoxin Zhang, Bo Liu, Yanling Yang, Jianhui Li, Jian Li, Yingru Zhao, Lichao Jia, Yifei Sun
Summary: Considering the future reliance on intermittent renewable energy, solid oxide electrolysis cell (SOEC) is crucial for efficient energy conversion and storage. The development of better materials and more energy-efficient operation methods for SOEC is still being pursued. This review article focuses on recent advancements in electrolyte, cathode, anode, and buffer layer materials for steam and CO2 electrolysis at the cell level. It also discusses the use of other fuels to reduce energy consumption and increase electrolyzer productivity at the stack level. Challenges and future research directions in SOECs are included.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Physical
Junya Tanaka, Kazuhisa Sato, Keiji Yashiro, Tatsuya Kawada, Toshiyuki Hashida
Summary: This study investigates the deformation behavior of the anode during reduction and the effect of reduction conditions using NiO-YSZ. It is found that the Ni volume fraction is a major factor, with low Ni volume fraction samples showing expansion and high Ni volume fraction samples showing shrinkage. The expansion behavior is due to the release of compressive residual stress on the YSZ side during reduction.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Tianpei Li, Tengpeng Wang, Changcai Shi, Shuo Chang, Min Zhang, Yanxia Zhao, C. E. Buckley, Yingchao Dong, Dehua Dong
Summary: Gaseous NOx emission is a critical environmental challenge and solid oxide cells (SOCS) offer great promises for effectively reducing NOx through electrochemical reduction. The study demonstrates efficient reduction of low-concentration NO over the same SOCS under different conditions, providing flexibility in cell operation. The design of dendritically channeled supporting perovskite cathodes increases electrolysis current density, enables stable operation, and facilitates high-performance hazardous gas conversion applications.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Ting Chen, Guozhu Zheng, Kui Liu, Guangjun Zhang, Zuzhi Huang, Minquan Liu, Juan Zhou, Shaorong Wang
Summary: This study fabricates a (La0.8Sr0.2)0.95MnO3-$ (LSM) supported reversible solid oxide cell (RSOC) with the configuration of La0.6Sr0.4Fe0.9Sc0.1O3-$ (LSFSc)-YSZ/YSZ/CuNi-CeO2-YSZ, utilizing tape casting, cosintering, and impregnation technologies. The RSOC shows significant power density and electrolysis performance, attributed to the optimized electrodes with increased triple phase boundary (TPB) area and faster gas diffusion and electrochemical reactions for water splitting.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Xiufu Sun, Yuliang Liu, Peter Vang Hendriksen, Ming Chen
Summary: The study tested three cells under different conditions to mimic gas flow series or parallel arrangements, finding that a gas-flow series arrangement led to reduced cell degradation by reducing the overall cell voltage degradation rate. This was attributed to the milder conditions and reduced polarization in the gas flow series case compared to the parallel flow case.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Takuro Fukumoto, Naoki Endo, Katsuya Natsukoshi, Yuya Tachikawa, George F. Harrington, Stephen M. Lyth, Junko Matsuda, Kazunari Sasaki
Summary: Reversible solid oxide cells (r-SOCs) have high efficiency for power generation and hydrogen generation, making them important for supporting renewable energy. The exchange current density is a crucial parameter for quantifying electrode performance. This study investigates the microstructure and apparent exchange current density of different fuel and air electrodes under varying temperature, fuel humidification, and oxygen concentration conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Editorial Material
Electrochemistry
Robert D. Green, S. Elango Elangovan, Fanglin Chen
Summary: In order to achieve long-term manned space exploration, critical needs for life support, such as oxygen and water, as well as electrical power for on-board operation, and the generation of propellants for ascent vehicles are essential. Low temperature electrochemical devices have been developed and used for on-board oxygen and power generation in previous manned space programs. High temperature solid oxide cell technology has unique advantages for future space missions. This perspective highlights the recent advances in solid oxide cell technology that make it feasible for adoption in aerospace applications and outlines the projected needs for future research and development to better support space exploration.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Energy & Fuels
Zhengpeng Chen, Jiajia Wang, Mingfei Li, Jiangbo Dong, Renci Xu, Jinsong Cheng, Kai Xiong, Mumin Rao, Chuangting Chen, Chenjin Shen, Xiaowei Li, Yihan Ling
Summary: The development of CO2 electrolysis using symmetric solid oxide electrolytic cells requires the identification of electrode materials with high catalytic activity and stability. In this study, a high entropy perovskite electrode material LPSSCFN was designed and synthesized, which exhibited higher stability and chemical compatibility in the CO2 atmosphere compared to SSFN. Symmetric cells with LPSSCFN-GDC electrode showed higher electrolytic current density and excellent long-term stability compared to those with SSFN-GDC electrode.
Article
Chemistry, Physical
Jisu Shin, Jung Hoon Park, Junseok Kim, Kyung Joong Yoon, Ji-Won Son, Jong-Ho Lee, Hae-Weon Lee, Ho-Il Ji
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Nanoscience & Nanotechnology
Mingi Choi, Ismail A. M. Ibrahim, Kyeounghak Kim, Ja Yang Koo, Seo Ju Kim, Ji-Won Son, Jeong Woo Han, Wonyoung Lee
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Physical
Cam-Anh Thieu, Sungeun Yang, Ho-Il Ji, Hyoungchul Kim, Kyung Joong Yoon, Jong-Ho Lee, Ji-Won Son
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Article
Chemistry, Multidisciplinary
Ki-Young Lee, Sujin Jo, Aik Jun Tan, Mantao Huang, Dongwon Choi, Jung Hoon Park, Ho-Il Ji, Ji-Won Son, Joonyeon Chang, Geoffrey S. D. Beach, Seonghoon Woo
Article
Energy & Fuels
Cam-Anh Thieu, Sangbaek Park, Hyoungchul Kim, Ho-Il Ji, Jong-Ho Lee, Kyung Joong Yoon, Sungeun Yang, Ji-Won Son
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
Jung Hoon Park, Jong-Ho Lee, Kyung Joong Yoon, Hyoungchul Kim, Ho-Il Ji, Sungeun Yang, Sangbaek Park, Seung Min Han, Ji-Won Son
Summary: By reducing the Ni content to 2 vol% and uniformly dispersing nano-sized Ni particles in a mixed ionic-electronic conducting matrix using a thin-film technique, remarkable stability and performance enhancement were achieved for the optimized nanostructured anodes. The study provides valuable insights for improving the durability, performance, and productivity of SOFCs.
Article
Chemistry, Multidisciplinary
Sung Soo Shin, Jeong Hun Kim, Hyeseong Jeong, Mi Young Park, Kyung Joong Yoon, Ji-Won Son, Mansoo Choi, Hyoungchul Kim
Summary: The article introduces a novel two-step precursor infiltration process for fabricating high-performance LT-SOFCs with homogeneous and robust nanocatalysts. The infiltration technique reduces cathodic polarization resistance and achieves an enhanced peak power density in LT-SOFC technology.
Article
Chemistry, Physical
Cam-Anh Thieu, Sungeun Yang, Ho-Il Ji, Hyoungchul Kim, Kyung Joong Yoon, Jong-Ho Lee, Ji-Won Son
Summary: The use of low-cost catalysts, Cu and CeO2, in TF-SOFCs can significantly increase performance and efficiency of solid oxide fuel cells, especially at lower operating temperatures, while also reducing costs and improving resistance to carbon deposition.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Multidisciplinary Sciences
Junseok Kim, Seunghyeok Im, Seol Hee Oh, Ji Yeong Lee, Kyung Joong Yoon, Ji-Won Son, Sungeun Yang, Byung-Kook Kim, Jong-Heun Lee, Hae-Weon Lee, Jong-Ho Lee, Ho-Il Ji
Summary: Solid oxide cells with a bilayer electrolyte structure have been successfully fabricated at lower sintering temperature, demonstrating high performance and defect-free characteristics. The resulting cells show minimal ohmic loss and remarkable performance in both fuel cell and electrolysis operations.
Article
Energy & Fuels
Dong Hwan Kim, Sungeun Yang, Deok-Hwang Kwon, Ho-Il Ji, Ji-Won Son, Joon Hyung Shim
Summary: This study aimed to improve the stability of solid oxide fuel cell cathodes by surface modification to overcome performance degradation during high-temperature fabrication. Wet chemical etching was used to remove segregated elements and atomic layer deposition was employed to prevent further element separation. The modified cathodes showed improved stability and performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Han Gil Seo, Dong Hwan Kim, Jongsu Seo, Seung Jin Jeong, Jinwook Kim, Harry L. Tuller, Ji-Won Son, WooChul Jung
Summary: This study demonstrates high-performance and durable solid oxide fuel cells (SOFCs) by employing a cobalt/strontium-free fluorite-based mixed conducting cathode. The developed PCO electrode shows remarkable low electrode resistance and exceptional long-term stability, outperforming conventional perovskite cathodes.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Hyegsoon An, Seunghyeok Im, Junseok Kim, Byung-Kook Kim, Ji-Won Son, Kyung Joong Yoon, Hyoungchul Kim, Sungeun Yang, Hyungmook Kang, Jong-Ho Lee, Ho-Il Ji
Summary: This study reveals a new mechanism of sintering activation, in which the release of vapor-phase BaNiOx accelerates the sintering of refractory proton-conducting oxides.
ACS ENERGY LETTERS
(2022)
Article
Multidisciplinary Sciences
Seongkook Oh, Min Jun Oh, Jongsup Hong, Kyung Joong Yoon, Ho-Il Ji, Jong-Ho Lee, Hyungmook Kang, Ji-Won Son, Sungeun Yang
Summary: The study focused on utilizing NH3 fuel in SOFCs, with findings indicating that lowering operating temperatures can diversify application areas and that efficient ammonia decomposition catalysts are crucial for enhancing the performance of low-temperature DA-SOFCs.
Article
Chemistry, Physical
Seunghyeok Im, Muhammet Ali Berk, Sungeun Yang, Byung-Kook Kim, Kyung Joong Yoon, Ji-Won Son, Jong-Ho Lee, Ho-Il Ji
Summary: This study investigates the proton uptake mechanism in the triple ionic-electronic conducting oxide PBSCF and discusses the correlations between the proton uptake mechanisms and properties such as mass and conductivity changes.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Channyung Lee, Sung Soo Shin, Jiwoo Choi, Jinhyeon Kim, Ji-Won Son, Mansoo Choi, Hyun Ho Shin
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
