Article
Chemistry, Physical
Hongwei Qiu, Guo Yang, Lijun Lv, Xingbo Han, Shuyan Zang, Wei Liu, Xiaofeng Wang
Summary: The LaMg12H27 (LMH) and LMH-5 wt% LiH samples were prepared by different ball milling times, and their hydrogen generation performances were investigated and compared. X-ray diffraction and scanning electron microscopy techniques were used to explain the performance improvement mechanisms. The hydrogen generation yield and kinetics of LMH can be significantly improved with increasing ball milling time, possibly due to changes in the particle size and crystallite size of LMH. However, for the LMH-5 wt% LiH sample, the initial kinetics increases first and then decreases with increasing ball milling time, possibly due to the gradual movement of LiH from the surface to the interior of LMH and the covering of LMH after ball milling.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Manufacturing
Aswathy S. Nair, Vasumathi Nallusamy, K. Jayasankar, S. S. Sreejakumari
Summary: The study focuses on preparing FLG directly from beneficiated graphite ore using mechanochemical milling technique. The process involves beneficiation of low-grade graphite ore from India, chemical treatment to enrich carbon content, and mechanical milling with oxalic acid to successfully produce few-layered graphene.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Chemistry, Physical
Lixiang Zhu, Meishuai Zou, Xiaodong Zhang, Lichen Zhang, Xiaoxuan Wang, Tinglu Song, Shuo Wang, Xiaodong Li
Summary: The paper introduces a new method to enhance the hydrogen generation rate of Al alloys through a multi-step process. The addition of low-melting-point Ga-In-Sn phases acts as a transmission medium to improve the diffusion of Al, leading to higher hydrogen generation performance. Results show significantly improved H-2 generation rate and efficiency compared to previous studies.
Article
Chemistry, Inorganic & Nuclear
Noemi Leick, Ba L. Tran, Mark E. Bowden, Thomas Gennett, Tom Autrey
Summary: This study investigated the thermal stability of coordination complexes formed between different glymes with Mg(BH4)(2), revealing diverse phase transitions, speciations, and decomposition pathways despite their structural similarities.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
S. P. du Preez, D. G. Bessarabov
Summary: The study explores the hydrolysis of aluminum for hydrogen generation in proton exchange membrane fuel cell applications. It suggests mechanochemical activation with certain metals to enable spontaneous hydrolysis of aluminum and discusses the formation of galvanic cells in the process. Additionally, it provides a summary of existing aluminum composites and the recovery of activation metals for economic feasibility.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Olesya A. Buryakovskaya, Mikhail S. Vlaskin
Summary: A method has been developed to transform magnesium scrap into highly efficient hydroreactive material. The addition of Devarda's alloy during ball milling can accelerate the reaction and improve the production of hydrogen gas and reaction rates.
Article
Chemistry, Physical
Jyun-Lin Lai, Win-Jet Luo, Yean-Der Kuan, Pai-Jun Zhang
Summary: This study focused on processing water vapor to increase hydrogen production. Experimental results indicated that using a certain concentration of catalyst and appropriate operating conditions can effectively enhance hydrogen production.
Article
Engineering, Environmental
Xian-jin Ma, Heng Yang, Bin Wang, Lang Wu, Xue Ma, Yu-xiang Li, Hao Deng
Summary: A heterojunction TiO2/g-C3N4 photocatalyst was synthesized using a ball-milling method, which showed high efficiency in degrading TcO4-. Under simulated sunlight irradiation, the removal rate of ReO4- reached over 95% in 10 min, making it faster than other photocatalysts.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Deng -Hui Xuan, Yu -Ping Qiu, Ping Wang
Summary: By mechanically milling aluminum powder with activated charcoal, the reactivity of aluminum with alkaline solution can be significantly improved. This method is cost-effective and yields a high hydrogen generation rate, making it promising for mobile and portable applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jamey Davies, Stephanus P. du Preez, Dmitri G. Bessarabov
Summary: In this investigation, ternary Al-Bi-Zn composites were prepared using mechanochemical activation to study the effects of low-cost Bi and Zn on the morphology change and reactivity of Al during hydrolysis reaction. The results showed that Bi and Zn were distributed uniformly in Al particles without forming intermetallic phases. The composite with 7.5 wt% Bi and 2.5 wt% Zn exhibited a high hydrogen yield.
Article
Chemistry, Physical
Jifeng Deng, Kurbannisa Kadeer, Chaoyuan Hu, Zewei Xie, Yu Shi, Xiao Liu, Lei Xie, Jinrong Xu, Jie Zheng, Xingguo Li
Summary: In this study, a sponge catalyst for hydrogen generation from liquid hydrogen carriers was developed. The commercial melamine formaldehyde (MF) sponge was modified by grafting polyvinyl alcohol (PVA) through acid-catalyzed acetalization with formaldehyde. The resulting polyvinyl formal/MF (PVF/MF) composite sponge exhibited excellent characteristics as a catalyst, including high activity, high hydrogen storage density, easy catalyst recycling, and quasi-solid state behavior during H-2 generation, as demonstrated in the applications of NaBH4 solution and thermal dehydrogenation of perhydro N-ethylcarbazole.
JOURNAL OF POWER SOURCES
(2023)
Article
Energy & Fuels
Minoo Bagheri, Yeganeh Amidi, Mohammad Yaser Masoomi
Summary: In this study, quasi-ZIF-67 (Q-ZIF-67) with large-scale structural defects was synthesized via controlled thermal partial deligandation. Q-ZIF-67 exhibited enhanced catalytic activity for hydrolysis of NaBH4, generating hydrogen at a high rate under mild conditions. Mechanistic studies revealed the importance of strong acidity for efficient hydrogen generation.
Article
Energy & Fuels
Jamey Davies, Stephanus P. Du Preez, Dmitri G. Bessarabov
Summary: In this study, Al-Bi-Ni composites were successfully prepared and hydrolyzed. Scanning electron microscopy showed that Bi and Ni were uniformly distributed in the Al particles, resulting in micro-galvanic interactions during the hydrolysis reaction. The successfully prepared composites exhibited good hydrogen production, and the mass ratio and water quality affected the hydrolysis activity.
Article
Chemistry, Physical
Zhijie Cao, Michael Felderhoff
Summary: Ytterbium tetrahydroaluminate Yb(AlH4)3 was successfully synthesized via a mechanochemical procedure under hydrogen atmosphere, with its thermal decomposition proceeding through four stages. The first dehydrogenation step exhibited a relatively low apparent activation energy, while rehydrogenation tests showed unsuccessful rehydrogenations of the first decomposition step.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Frances Pope, Noe Watson, Antoine Deblais, Gadi Rothenberg
Summary: Alkali metal borohydrides are promising materials for large-scale hydrogen storage. This study investigates the physical and chemical properties of self-hydrolysis solutions by monitoring the hydrogen evolution, pH changes, and reaction intermediates using NMR. Higher concentrations of borohydride lead to significant changes in the system's microstructure and result in non-Newtonian behavior.
Article
Materials Science, Multidisciplinary
Amirreza Shirani Bidabadi, Andreas Korinek, Gianluigi A. Botton, Robert A. Varin
Article
Chemistry, Physical
Sanam Atashin, John Z. Wen, Robert A. Varin
JOURNAL OF ALLOYS AND COMPOUNDS
(2015)
Article
Nanoscience & Nanotechnology
Magda Lazinska, Tomasz Durejko, Stanislaw Lipinski, Wojciech Polkowski, Tomasz Czujko, Robert A. Varin
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2015)
Article
Chemistry, Physical
Robert A. Varin, Ewelina E. Kosciuczyk, Tomasz Czujko
Article
Chemistry, Physical
Przemyslaw Litwa, Krzysztof Perkowski, Dariusz Zasada, Izabela Kobus, Gustaw Konopka, Tomasz Czujko, Robert A. Varin
JOURNAL OF ALLOYS AND COMPOUNDS
(2016)
Article
Nanoscience & Nanotechnology
Tomasz Durejko, Michal Zietala, Magda Lazinska, Stanislaw Lipinski, Wojciech Polkowski, Tornasz Czujko, Robert A. Varin
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2016)
Article
Chemistry, Multidisciplinary
S. Atashin, J. Z. Wen, R. A. Varin
Article
Chemistry, Physical
Tomasz Durejko, Justyna Aniszewska, Michal Zietala, Anna Antolak-Dudka, Tomasz Czujko, Robert A. Varin, Vlad Paserin
Article
Chemistry, Physical
P. Matysik, T. Czujko, R. A. Varin
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Chemistry, Physical
R. A. Varin, R. Parviz
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Chemistry, Physical
Robert A. Varin, Amirreza Shirani Bidabadi
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Materials Science, Multidisciplinary
Wojciech J. Stepniowski, Agata Nowak-Stepniowska, Adam Presz, Tomasz Czujko, Robert A. Varin
MATERIALS CHARACTERIZATION
(2014)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)