Article
Chemistry, Applied
Dongxu Cui, Anna Sciazko, Yosuke Komatsu, Akiko Nakamura, Toru Hara, Shiliang Wu, Rui Xiao, Naoki Shikazono
Summary: In this study, two Ni/YSZ anodes with different volume ratios of Ni and YSZ were operated in dry methane under open circuit and polarized conditions. The reconstructed microstructures showed that the Ni surface near the active TPB did not have carbon deposition, while the remaining Ni surface away from the TPB exhibited severe carbon deposition. The results indicate a complex interplay between electrochemical steam generation and methane cracking on Ni surface.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Heesu Hwang, Junsung Ahn, Hyunbae Lee, Jiwon Oh, Jaehwan Kim, Jae-Pyeong Ahn, Hong-Kyu Kim, Jong-Ho Lee, Young Yoon, Jin-Ha Hwang
Summary: Quantitative microstructural interpretations of Ni/YSZ cermets were conducted using deep learning and FIB-SEM analytics, eliminating subjective analysis and artifact issues.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Buse Bilbey, Meltem Sezen, Cleva W. Ow-Yang, Busra Tugba Camic, Aligul Buyukaksoy
Summary: A new method for fabricating nickel and YSZ composite anodes was utilized in this study, with the application of a pre-calcination step in the oxidized state and a CeO2 overlayer, which significantly improved the electrochemical performance and stability of the anodes.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Engineering, Environmental
Anna Sciazko, Yosuke Komatsu, Akiko Nakamura, Zhufeng Ouyang, Toru Hara, Naoki Shikazono
Summary: Carbon deposition is a critical challenge in operating solid oxide fuel cells with carbon containing fuels. This study presents the quantitative reconstruction of carbon deposition in the SOFC electrode using a machine learning assisted image processing framework. The developed microstructure evaluation framework will contribute to the understanding and mitigation of carbon deposition in SOFC anodes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Ceramics
Patryk Blaszczak, Agata Ducka, Barbara Wolanin, Krzysztof Matlak, Grzegorz Machowski, Marta Przesniak-Welenc, Sea-Fue Wang, Beata Bochentyn, Piotr Jasinski
Summary: A novel one-pot synthesis route was developed to fabricate wormhole-like structures in porous YSZ and Ni-YSZ systems. This method achieved mechanically stable skeletons with nearly 50% open porosity without using additional pore-formers. The obtained Ni-YSZ anode demonstrated better long-term electrical stability and higher electrochemical activity due to the suppression of Ni structural changes and improved interfacial interaction with YSZ.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Electrochemistry
Jillian G. Rix, Boshan Mo, Alexey Y. Nikiforov, Uday B. Pal, Srikanth Gopalan, Soumendra N. Basu
Summary: Increasing the density of percolated triple phase boundaries (TPBs) by infiltrating nanoscale electrocatalysts can improve the performance of solid oxide fuel cell (SOFC) anodes. However, the complex microstructure of these infiltrated nanocatalysts creates challenges in quantifying their role in anode performance improvements. The study found that the added nanoscale percolated TPB boundaries are more electrochemically active as compared to the cermet TPB boundaries, indicating that other factors besides TPB density contribute to the improved performance of the anodes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Tolga Altan, Selahattin Celik, Serkan Toros, Habip Gokay Korkmaz, Bora Timurkutluk
Summary: The redox cycles of Ni-based anodes in solid oxide fuel cells (SOFCs) have a direct impact on cell performance by breaking anode three/triple phase boundary networks at the microscale. These microcracks accumulate with the number of cycles, causing mechanical damage and threatening the service life of SOFC systems. This study proposes a microscale approach to investigate the redox process of Ni-based SOFC anodes, characterizing the anodes and determining the composition with the highest redox tolerance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Jianjun Ma, Yao Jiang, Paul A. Connor, Stephen R. Gamble, Mark Cassidy, Cairong Jiang, John T. S. Irvine
Summary: Ni-YSZ is a common anode for solid oxide fuel cells (SOFCs) due to its excellent catalytic performance and electronic conductivity. However, natural biogas fuels often contain sulfur, which complicates the use of nickel anodes. This paper investigates sulfur poisoning and the recovery of BCZYYb- impregnated nickel anode-supported cells in biogas. The research reveals that the suppression of reforming reactions might cause sulfur poisoning, and the degradation of current in working conditions is attributed to the deactivation of reforming reactions and catalyst activity.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Xue Zhang, Cunshan Wang, Wenfei Yang, Dongdong Gao, Zhongyuan Zhang, Xinglong Dong
Summary: Integrated Al/Ni electrodes with variant atomic ratios for lithium-ion batteries were successfully fabricated using a one-step laser-sintering process. The microstructure, phase composition, and pore structure of the electrodes were controlled by the raw material composition and laser parameters. The electrodes showed excellent working merits without the need for conductive agents, binders, or collectors used in traditional batteries. The Al/Ni atomic ratio influenced the phase composition and pore structure of the electrodes, with a 3:7 ratio showing the best cycling/rate performance.
Article
Chemistry, Physical
Prajna P. Mohapatra, Pamu Dobbidi
Summary: The demand for ferrites in the form of thin films has increased due to the growth in microwave and semiconductor industries. LiDy0.1Fe4.9O8 films and their capacitors with different thicknesses were fabricated using PLD. The properties of the films were influenced by lattice mismatch, grain size, and magnetoelastic energy density. The varying thickness of the film was found to be an effective parameter for tuning its physical properties.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yuxin Shi, Guoyin Zhu, Xiaotian Guo, Qingling Jing, Huan Pang, Yizhou Zhang
Summary: A facile approach to obtain MXene-encapsulated porous Ni-NDC nanosheets was reported, which exhibited improved conductivity and cycling performance, showing potential for application as an anode material in lithium-ion batteries.
Article
Chemistry, Multidisciplinary
Katherine Develos-Bagarinao, Toshiaki Yamaguchi, Haruo Kishimoto
Summary: In order to improve the performance and stability of solid oxide cells (SOCs), this study compares anode-supported cells with thin films to those with conventional screen-printed yttria-stabilized zirconia (YSZ). It is found that thin film structures can suppress nickel diffusion and reduce resistance, resulting in excellent performance and durability in fuel cell operation.
Article
Chemistry, Physical
Yuxin Shi, Guoyin Zhu, Xiaotian Guo, Qingling Jing, Huan Pang, Yizhou Zhang
Summary: In this study, MXene-encapsulated porous Ni-naphthalene dicarboxylic acid (Ni-NDC) nanosheets were obtained through a facile approach by hybridizing ultrathin Ti3C2 MXene and three-dimensional Ni-NDC nanosheet aggregates. The introduction of MXene improved the conductivity and buffer the volume expansion of Ni-NDC nanosheets, leading to a hybrid electrode with reversible discharge capacity and good long-term cycling performance.
Article
Chemistry, Physical
An He, Jiaming Gong, Junya Onishi, Naoki Shikazono
Summary: A numerical model is developed to optimize the 3D multiphase electrode microstructure for solid oxide fuel cells. The Ni-YSZ microstructure is deformed to maximize the total reaction current, and the multiphase level-set model and adjoint method are used for sensitivity analysis. A radius constraint is imposed to improve computational accuracy and manufacturability of the optimized microstructure.
Article
Chemistry, Physical
D. A. Osinkin
Summary: Nickel-ceramic composites are commonly used materials for solid oxide fuel cell anodes. The electrochemical activity of these composites can be improved by increasing the triple phase boundary length or impregnating with ceria. This study investigated highly active Ni-ceramic electrodes with different dispersion made from NiO and Zr0.84Sc0.16O1.92 powders and impregnation with ceria. The analysis using the distribution of relaxation times method revealed that the hydrogen oxidation rate in electrodes with low porosity is limited by two parallel gas diffusion processes in the same frequency range.
JOURNAL OF POWER SOURCES
(2023)
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, Multidisciplinary
Sung Soo Shin, Jeong Hun Kim, Kyung Taek, Kang-Taek Lee, Sang Moon Kim, Ji-Won Son, Mansoo Choi, Hyoungchul Kim
ENERGY & ENVIRONMENTAL SCIENCE
(2020)
Article
Chemistry, Physical
Sergey Yu. Ketkov, Sheng-Yuan Tzeng, Elena A. Rychagova, Anton N. Lukoyanov, Wen-Bih Tzeng
Summary: Metallocenes, including methylcobaltocene, play important roles in various fields of chemistry. The ionization energy and vibrational structure of (Cp ')(Cp)Co can be influenced by introducing methyl substituents. The mass-analyzed threshold ionization spectrum and DFT calculations provide accurate information about the properties and transformations of (Cp ')(Cp)Co.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Review
Chemistry, Physical
Qifeng Mu, Jian Hu
Summary: Polymer mechanochemistry has experienced a renaissance due to the rapid development of mechanophores and principles governing mechanochemical transduction or material strengthening. It has not only provided fundamental guidelines for converting mechanical energy into chemical output, but also found applications in engineering and smart devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Da Hye Yang, Francesco Ricci, Fredrik L. Nordstrom, Na Li
Summary: Through systematic evaluation of the oiling-out behavior of procaine, we identified both stable and metastable liquid-liquid phase separation, and established phase diagrams to assist in rational selection of crystallization strategies.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Vikki Anand Varma, Simmie Jaglan, Mohd Yasir Khan, Sujin B. Babu
Summary: Designing engineering structures like nanocages, shells, and containers through self-assembly of colloids is a challenging problem. This work proposes a simple model for the subunit, which leads to the formation of monodispersed spherical cages or containers. The model with only one control parameter can be used to design cages with the desired radius.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Hainan Jiang, Yaolong He, Xiaolin Li, Zhiyao Jin, Huijie Yu, Dawei Li
Summary: The cycling lifespan and coulombic efficiency of lithium-ion batteries are crucial for high C-rate applications. The Li-ion concentration plays a crucial role in determining the mechanical integrity and structural stability of electrodes. This study focuses on graphite as the working electrode and establishes an experimental system to investigate the mechanical properties of composite graphite electrode at different C-rates. Considering the effect of Li-ion concentration in stress analysis is found to be significant.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Zhiye Wang, Yunchuan Li, Mingjun Sun
Summary: This study investigates the influence of intramolecular pi-pi interactions on the electronic transport capabilities of molecules. By designing and analyzing three pi-conjugated molecules, the researchers observe that different pi-conjugated structures have varying effects on electron transport. The findings provide a theoretical foundation for designing single-molecule electronic devices with multiple electron channels based on intramolecular pi-pi interactions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Yuandong Xu, Haoyang Feng, Chaoyang Dong, Yuqing Yang, Meng Zhou, Yajun Wei, Hui Guo, Yaqing Wei, Jishan Su, Yingying Ben, Xia Zhang
Summary: Hollow MoS2 cubes and spheres were successfully synthesized using a one-step hydrothermal method with the hard template method. The hollow MoS2 cubes exhibited higher specific capacitance and energy density compared to the hollow MoS2 spheres. The symmetrical supercapacitors assembled with these hollow structures showed good performance and high capacity retention after multiple cycles. These findings suggest that controlling the pore structure and surface characteristics of MoS2 is crucial for enhancing its electrochemical properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Ainhoa Oliden-Sanchez, Rebeca Sola-Llano, Joaquin Perez-Pariente, Luis Gomez-Hortiguela, Virginia Martinez-Martinez
Summary: The combination of photoactive molecules and inorganic structures is important for the development of advanced materials in optics. In this study, bulky dyes were successfully encapsulated in a zeolitic framework, resulting in emission throughout the visible spectrum.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Miaomiao Zhang, Cunyuan Pei, Qiqi Xiang, Lintao Liu, Zhongxu Dai, Huijuan Ma, Shibing Ni
Summary: The design of a solid electrolyte interphase (SEI) plays a crucial role in improving the electrochemical performance of anode materials. In this study, lithium difluoro(oxalate)borate (LiDFOB) is used as an electrolyte additive to form a protective SEI film on Li3VO4 (LVO) anodes. The addition of LiDFOB results in a dense, uniform, stable, and LiF-richer SEI, which enhances the Li-ion storage kinetics. The generated SEI also prevents further decomposition of the electrolyte and maintains the morphology of LVO anodes during charge/discharge processes. This work demonstrates the effectiveness of LiDFOB as a multi-functional additive for LiPF6 electrolytes and provides insights into SEI construction for high-performance LVO anodes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
B. V. Andryushechkin, T. V. Pavlova, V. M. Shevlyuga
Summary: The atomic structure of the Ag(111)-p(4 x 4)-O phase was reexamined and two phases with the same periodicity were discovered. It was demonstrated that the accepted Ag6 model is incompatible with high-resolution oxygen-sensitive STM images.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
S. L. Romo-Avila, D. Marquez-Ruiz, R. A. Guirado-Lopez
Summary: In this study, we used density functional theory (DFT) calculations to investigate the interaction between model graphene oxide (GO) nanostructures and chlorine monoxide ClO. We aimed to understand the role of this highly oxidizing species in breaking C-C bonds and forming significant holes on GO sheets. Our results showed that C-C bonds in a single graphene oxide sheet can be broken through a simple mechanism involving the dissociation of two chemically attached ClO molecules. The formation of carbonyl groups and holes on the GO surface was also observed. This study provides important insights into the degradation of carbon nanotubes and the stability of GO during the myeloperoxidase (MPO) catalytic cycle.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Alberto Garcia-Fernandez, Birgit Kammlander, Stefania Riva, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the X-ray stability of five different lead halide perovskite compositions (MAPbI3, MAPbCl3, MAPbBr3, FAPbBr3, CsPbBr3) was investigated using photoelectron spectroscopy. Different degradation mechanisms and resistance to X-ray were observed depending on the crystal composition. Overall, perovskite compositions based on the MA+ cation were found to be less stable than those based on FA+ or Cs+. Metallic lead formation was most easily observed in the chloride perovskite, followed by bromide, and very little in MAPbI3. Multiple degradation processes were identified for the bromide compositions, including ion migration, formation of volatile and solid products, as well as metallic lead. CsBr was formed as a solid degradation product on the surface of CsPbBr3.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Timofei Rostilov, Vadim Ziborov, Alexander Dolgoborodov, Mikhail Kuskov
Summary: The shock-loading behavior of nanomaterials is investigated in this study. It is found that shock compaction waves exhibit a distinct two-step structure, with the formation of faster precursor waves that travel ahead of the main compaction waves. The complexity of the shock Hugoniot curve of the tested nanomaterial is described, and the effect of initial porosity on the compressed states is demonstrated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Sergey S. Nikitin, Alexander D. Koryakov, Elizaveta A. Antipinskaya, Alexey A. Markov, Mikhail V. Patrakeev
Summary: The stability of La1/3Sr2/3Fe1-xMnxO3-delta, a perovskite-type oxide, under reducing conditions is dependent on the manganese content. Increasing the manganese content leads to a decrease in stability. The behavior of iron and manganese in the oxide shows distinct differences, which can be attributed to the difference in the enthalpy of oxidation reactions. Additionally, the change in the La/Sr ratio affects the concentration of iron and manganese ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
Article
Chemistry, Physical
Mosayeb Naseri, Shirin Amirian, Mehrdad Faraji, Mohammad Abdur Rashid, Maicon Pierre Lourenco, Venkataraman Thangadurai, D. R. Salahub
Summary: Inspired by the successful transfer of freestanding ultrathin films of SrTiO3 and BiFeO3, this study assessed the structural stability and investigated the electronic, optical, and thermoelectric properties of a group of two-dimensional perovskite-type materials called perovskenes. The findings revealed that these materials are wide bandgap semiconductors with potential application in UV shielding. Moreover, they exhibit better electrical and thermal conductivity at high temperatures, enabling efficient power generation in thermoelectric devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2024)
