Article
Materials Science, Multidisciplinary
S. Mohammadkhani, V Jalilvand, B. Davis, G. H. Gauthier, A. Dolatabadi, C. Moreau, L. Roue, D. Guay
Summary: In this study, protective (Co, Ni)O coatings were deposited on CuNi-Fe alloys using the HVOF process to enhance their corrosion resistance at high temperatures. The behavior of the coatings and substrate compositions were studied, showing that coatings with higher nickel content can slow down oxygen and copper diffusion, while nickel-rich alloys form a NiFe2O4 scale that decreases in thickness with increased nickel content in the coatings.
Article
Chemistry, Physical
Marco-Tulio F. Rodrigues, Sathish Rajendran, Stephen E. Trask, Alison R. Dunlop, Avtar Singh, Jeffery M. Allen, Peter J. Weddle, Juliane I. Preimesberger, Jaclyn Coyle, Andrew M. Colclasure, Zhenzhen Yang, Brian J. Ingram, Andrew N. Jansen
Summary: This study reveals that strong binders can have counterproductive effects on silicon anodes. The stresses caused by cycling Si-based electrodes can lead to permanent deformation of the current collector, damaging the electrode coating and accelerating cell aging. The formation of wrinkles is found to be size-dependent, indicating that testing outcomes are highly influenced by scale, suggesting that validation of battery materials may require testing at larger cell formats.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Electrochemistry
Robert Maric, Christian Gebauer, Florian Eweiner, Peter Strasser
Summary: In fuel cell applications, managing stressful operating conditions is crucial for long lifetime requirements. This study investigates the incorporation of an OER-enhancing co-catalyst, specifically Ir-based co-catalysts, to improve stability in PEM fuel cells. The findings indicate that amorphous Ir oxyhydroxide shows the highest tolerance for cell reversal, while IrO2 provides a good trade-off between initial activity and stability during hydrogen starvation.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Jiaran Su, Xiuxiu Yin, Hainan Zhao, Hejie Yang, Di Yang, Li He, Meiling Wang, Shirui Jin, Kangning Zhao, Yizhan Wang, Yingjin Wei
Summary: This study examines the effect of cycling temperature on the early nucleation and growth behavior of Zn metal, finding that low temperature leads to the formation of smaller and denser nuclei, preventing dendrite formation. Based on this, a cooling-treatment-based self-healing strategy is developed to in situ eliminate dendrites, effectively prolonging the lifespan of the Zn anode by 520%.
Article
Engineering, Environmental
Baihe Guo, Yanlin Wang, Xiaolei Qiao, Xin Shen, Jingnan Guo, Jun Xiang, Yan Jin
Summary: Utilizing power plant fly ash to prepare CO2 adsorbent can achieve waste utilization and low-carbon power generation. By studying the performance and regeneration kinetics under different regeneration conditions, optimal regeneration conditions can be identified to achieve the recycling of adsorbent efficiently.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Physics, Applied
Remo A. A. Masut
Summary: The significance of the kinetic compensation effect (KCE) is controversial and lacks consensus in the scientific community. Efforts to understand the KCE have attempted to establish connections between microscopic events, structures, and mechanisms involved in kinetic processes. An alternative proposition suggests that the KCE does not involve new conceptual physics. Analysis of internal friction (IF) demonstrates that the KCE is a consequence of the maximum energy dissipation limit determined by the anelastic properties of the material.
JOURNAL OF APPLIED PHYSICS
(2022)
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
Chemistry, Applied
Shuzhen Chen, Changlei Qin, Weiyang Yuan, Dawid P. Hanak, Jingyu Ran
Summary: This study investigates the regeneration process of the high-temperature CO2 adsorbent Li4SiO4 and introduces the dependence of the regeneration rate on CO2 pressure for the first time. The findings show a correlation between the reaction order and the difference between equilibrium pressure and CO2 pressure, as well as provide apparent activation energy values for Li4SiO4 and KLi4SiO4 regeneration. The proposed power law model with m = 4/3 is suggested to be the most probable mechanism function for Li4SiO4-based sorbents regeneration.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
Gearoid A. Collins, Karrina McNamara, Seamus Kilian, Hugh Geaney, Kevin M. Ryan
Summary: The electrochemical performance of Ge alloying anode nanowires in Li-ion full cells was analyzed at different temperatures, with electrolyte additives showing improvement in low-temperature performance and capacity fade inhibition. Alloying anodes in suitably configured electrolytes can deliver high performance at extreme temperature ranges.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Energy & Fuels
Enrico Squizzato, Caterina Sanna, Antonella Glisenti, Paola Costamagna
Summary: This study investigated the structural and catalytic characteristics of La0.6Sr0.4MnO3 (LSM) nanofibers compared to LSM powders. The results showed that nanofibers had higher surface area and better catalytic performance than powders.
Article
Chemistry, Physical
Xiaolong Yao, Yeonghun Lee, Davide Ceresoli, Kyeongjae Cho
Summary: In this study, the quantitative investigation of inelastic electron scattering with a molecular target revealed the significant influence of wave packet sizes, target orientations, and impact parameters on energy transfer. While wave packet sizes had minimal impact on the overall profile of internal excited states, different target orientations resulted in significantly different internal excited states. This study demonstrates the potential of using real-time time-dependent density functional theory for simulating inelastic electron scattering processes and provides critical information for exploring electronic excitations in electron-induced chemical reactions in technological applications.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Xiaolong Yang, Ying Wang, Xian Wang, Bingbao Mei, Ergui Luo, Yang Li, Qinglei Meng, Zhao Jin, Zheng Jiang, Changpeng Liu, Junjie Ge, Wei Xing
Summary: By utilizing a novel catalyst containing both Ir nanoparticles and Ir single-atom sites, the issue of CO poisoning in proton-exchange membrane fuel cells (PEMFCs) has been successfully addressed, leading to excellent H-2 oxidation activity and CO electro-oxidation activity. The interplay between Ir nanoparticles and Ir single-atom centers confers the catalyst with improved performance in tolerating CO in H-2/CO mixture gas compared to the current best PtRu/C catalyst.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Physics, Nuclear
Jie Zhao, Tamara Niksic, Dario Vretenar
Summary: This model calculates the total kinetic energy distribution of fission fragments using the time-dependent generator coordinate method extended to include dissipation effects. It computes the integrated flux of probability current and the kinetic energy at scission for a specific pair of fragments to determine the TKE distribution.
Article
Chemistry, Physical
Kohei Matsumoto, Yuya Tachikawa, Stephen M. Lyth, Junko Matsuda, Kazunari Sasaki
Summary: Ni-Co alloy cermet anodes are highly attractive for the development of robust solid oxide fuel cells (SOFCs) due to their high durability, comparable electrochemical performance, and protection against further oxidation provided by cobalt-rich oxide layers on the surface of the alloy particles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Ambroz Kregar, Matija Gatalo, Nik Maselj, Nejc Hodnik, Tomaz Katrasnik
Summary: Mathematical modelling is crucial for understanding the degradation of platinum-based carbon-supported catalysts in PEMFC, helping in the development of new materials and mitigation strategies, as well as improving the understanding of individual degradation mechanisms. According to the model, platinum dissolution and redeposition are strongly affected by temperature, being the main mechanism of particle growth at temperatures below 60 degrees C.
JOURNAL OF POWER SOURCES
(2021)
