Article
Chemistry, Physical
Xin F. Tan, Manjin Kim, Qinfen Gu, Julio Pinzon Piraquive, Guang Zeng, Stuart D. McDonald, Kazuhiro Nogita
Summary: This study investigates the effects of Na in hypo-eutectic Mg-lwt.%Si alloys for H-2 storage applications. The addition of trace amounts of Na is vital in improving the H-2 sorption kinetics, achieving a high storage capacity. The study also analyzes the hydrogen sorption mechanisms and identifies the role of Na in facilitating hydrogen diffusion.
JOURNAL OF POWER SOURCES
(2022)
Article
Nanoscience & Nanotechnology
Qing Tan, Zhiran Yan, Runguang Li, Yang Ren, Yandong Wang, Baptiste Gault, Stoichko Antonov
Summary: This study investigates the deformation behavior of hydrogen-charged commercially pure titanium using in-situ high energy X-ray diffraction. The results reveal that the peak broadening in the diffusion patterns is caused by high internal and interphase stresses generated within and around the hydrides due to volume expansion caused by phase transformation. The hydrides exhibit high strength but brittle secondary phase behavior and sustain larger strains than the matrix. This study provides valuable insights into hydride deformation behavior and hydrogen embrittlement in titanium and zirconium.
SCRIPTA MATERIALIA
(2022)
Review
Chemistry, Physical
Changhyo Sun, Chenxi Wang, Taejun Ha, Joonho Lee, Jae-Hyeok Shim, Yunseok Kim
Summary: Increasing demand for renewable and clean energy due to environmental pollution and energy consumption has led to increased attention towards hydrogen storage materials. These materials have high safety and large volumetric density for hydrogen storage, making them suitable for large-capacity and long-term energy storage capability. Various characterization techniques have been used to understand the mechanisms of hydrogen absorption and desorption, with a recent focus on local characterization techniques to study surface and nanostructural interface effects. This article reviews the application of these characterization techniques in exploring hydrogen storage materials.
Review
Chemistry, Physical
N. A. Ali, N. A. Sazelee, M. Ismail
Summary: Metal hydrides and complex hydrides are the most convenient method for hydrogen storage, offering high hydrogen capacity, but facing challenges of high operating temperature and low reversibility.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Mahvash Afzal, Nandlal Gupta, Aashish Mallik, K. S. Vishnulal, Pratibha Sharma
Summary: This study continues the computational analysis of a reactor with hexagonal honeycomb-based heat transfer enhancements, investigating the performance of a metal alloy and the reactor experimentally. It determines the gravimetric capacity and reaction kinetics of the alloy La0.9Ce0.1Ni5, while also exploring the impact of operating conditions on reactor performance. Additionally, evaporative cooling is tested for the first time as a heat removal technique for metal hydride based hydrogen storage reactors and found to significantly improve heat transfer.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Neslihan Aslan, Goekhan Gizer, Claudio Pistidda, Martin Dornheim, Martin Mueller, Sebastian Busch, Wiebke Lohstroh
Summary: The addition of LiBH4 to form Li4(BH4)(NH2)3 significantly improves the hydrogen storage performance of reactive hydride composite Mg(NH2)2+2LiH. The study reveals localized rotational motions in Li4(BH4)(NH2)3 at temperatures below 514 K, and the activation energy for the rotational motion is determined through QENS measurements.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Energy & Fuels
Nozomi Noto, Shigehito Isobe, Naoyuki Hashimoto
Summary: The research evaluated the dehydrogenation properties of several hydride-hydroxide systems and found that only the KH-LiOH system showed potential for reversible hydrogen adsorption/desorption, although rehydrogenation would require extremely high pressure.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Materials Science, Multidisciplinary
Xin F. Tan, Manjin Kim, Kazuhiro Yasuda, Kazuhiro Nogita
Summary: Bulk Mg-based hydrogen storage materials have the potential to provide a low-cost solution for energy storage and transportation. They are safer and more oxidation resistant compared to nano powders. Various alloying elements and innovative processing methods can be used to improve the performance of bulk Mg alloys in terms of hydrogen sorption kinetics and stability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Boris P. Tarasov, Pavel V. Fursikov, Alexey A. Volodin, Mikhail S. Bocharnikov, Yustinas Ya Shimkus, Aleksey M. Kashin, Volodymyr A. Yartys, Stanford Chidziva, Sivakumar Pasupathi, Mykhaylo V. Lototskyy
Summary: This article provides an overview of literature data and R&D activities on energy storage technologies using hydrogen and metal hydrides, with a focus on selecting metal hydride materials based on AB(5)- and AB(2)-type intermetallic compounds for hydrogen storage and compression applications. It also discusses features of integrated energy storage systems utilizing metal hydride hydrogen storage and compression components developed by IPCP and HySA Systems.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
A. G. Olabi, Adel Saleh Bahri, Aasim Ahmed Abdelghafar, Ahmad Baroutaji, Enas Taha Sayed, Abdul Hai Alami, Hegazy Rezk, Mohammad Ali Abdelkareem
Summary: Hydrogen has been identified as the most promising carrier of clean energy in the efforts to replace fossil fuels. Hydrogen generation technologies play a key role in the energy mix and integrating them with other renewable energy systems is becoming increasingly feasible. While progress has been made in large-scale production and storage of hydrogen, local conditions and multiple strategies may be needed to achieve significant production and storage.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Energy & Fuels
Nejc Klopcic, Ilena Grimmer, Franz Winkler, Markus Sartory, Alexander Trattner
Summary: Efficient energy storage is crucial for the shift to renewable energies, and hydrogen storage in metal hydrides offers high energy densities and safety advantages. This work investigates the technical, economic, and environmental aspects of different metal hydride materials, including their properties, production methods, and potential enhancements. The impacts on material costs, raw material abundance, and import dependency are discussed, and the advantages and disadvantages of selected materials are derived for material selection. Further research on material properties and system-level improvements is needed for widespread application of metal hydrides.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Yang Meng, Shunlong Ju, Wei Chen, Xiaowei Chen, Guanglin Xia, Dalin Sun, Xuebin Yu
Summary: By fabricating V4Nb18O55 microspheres, the H-2 desorption and absorption properties of MgH2 can be improved and the uniform formation of Nb/V interfaces can be achieved, resulting in the reduction of dehydrogenation temperature of MgH2 and the enhancement of hydrogenation reaction rate.
Article
Chemistry, Physical
Xiaoyue Zhang, Yahui Sun, Guanglin Xia, Xuebin Yu
Summary: Light-weight solid-state hydrogen storage materials, such as metal hydrides and complex hydrides, have great application potential due to their high hydrogen storage densities. Neutron scattering techniques have become powerful tools for characterizing the hydrogen storage mechanism of these materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Rui Shi, Haoxing Yan, Jiguang Zhang, Haiguang Gao, Yunfeng Zhu, Yana Liu, Xiaohui Hu, Yao Zhang, Liquan Li
Summary: A simple, cost-effective method of water treatment is proposed to produce highly reactive and air-stable bulk Mg-Ni-based hydrides in this study. The method can significantly decrease the dehydrogenation temperature and allow the hydrides to be stored under ambient conditions without losing activity, providing an alternative approach to design low-cost, highly active metal hydrides.
Article
Materials Science, Multidisciplinary
Fahim Karimi, Stefan Borries, P. Klaus Pranzas, Oliver Metz, Armin Hoell, Gokhan Gizer, Julian A. Puszkiel, Maria V. C. Riglos, Claudio Pistidda, Martin Dornheim, Thomas Klassen, Andreas Schreyer
Summary: The study investigated the LiBH2-MgH2 composite system with and without ScCl3 additive using synchrotron- and neutron-radiation-based probing methods to characterize their hydrogen storage properties. By combining neutron- and photon-based methods, the research provided insights into reaction mechanisms, interactions, material transport, and structural changes in the metal-hydrogen systems.
ADVANCED ENGINEERING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Y. Liu, K. Zweiacker, C. Liu, J. T. McKeown, J. M. K. Wiezorek
Summary: The evolution of rapid solidification microstructure and solidification interface velocity of hypereutectic Al-20at.%Cu alloy after laser melting has been studied experimentally. It was found that the formation of microstructure was dominated by eutectic, alpha-cell, and banded morphology grains, and the growth modes changed with increasing interface velocity.
Article
Materials Science, Multidisciplinary
Bharat Gwalani, Julian Escobar, Miao Song, Jonova Thomas, Joshua Silverstein, Andrew Chihpin Chuang, Dileep Singh, Michael P. Brady, Yukinori Yamamoto, Thomas R. Watkins, Arun Devaraj
Summary: Castable alumina forming austenitic alloys exhibit superior creep life and oxidation resistance at high temperatures. This study reveals the mechanism behind the enhanced creep performance of these alloys by suppressing primary carbide formation and offers a promising alloy design strategy for high-temperature applications.
Article
Materials Science, Multidisciplinary
Jian Song, Qi Zhang, Songsong Yao, Kunming Yang, Houyu Ma, Jiamiao Ni, Boan Zhong, Yue Liu, Jian Wang, Tongxiang Fan
Summary: Recent studies have shown that achieving an atomically flat surface for metals can greatly improve their oxidation resistance and enhance their electronic-optical applications. Researchers have explored the use of graphene as a covering layer to achieve atomically flat surfaces. They found that high-temperature deposited graphene on copper surfaces formed mono-atomic steps, while annealed copper and transferred graphene on copper interfaces formed multi-atomic steps.
Article
Materials Science, Multidisciplinary
Jennifer A. Glerum, Jon-Erik Mogonye, David C. Dunand
Summary: Elemental powders of Al, Ti, Sc, and Zr are blended and processed via laser powder-bed fusion to create binary and ternary alloys. The microstructural analysis and mechanical testing show that the addition of Ti results in the formation of primary precipitates, while the addition of Sc and Zr leads to the formation of fine grain bands. The Al-0.25Ti-0.25Zr alloy exhibits comparable strain rates to Al-0.5Zr at low stresses, but significantly higher strain rates at higher stresses during compressive creep testing. Finite element modeling suggests that the connectivity of coarse and fine grain regions is a critical factor affecting the creep resistance of the alloys.
Article
Materials Science, Multidisciplinary
P. Jannotti, B. C. Hornbuckle, J. T. Lloyd, N. Lorenzo, M. Aniska, T. L. Luckenbaugh, A. J. Roberts, A. Giri, K. A. Darling
Summary: This work characterizes the thermo-mechanical behavior of bulk nanocrystalline Cu-Ta alloys under extreme conditions. The experiments reveal that the alloys exhibit unique mechanical properties, behaving differently from conventional nanocrystalline Cu. They do not undergo grain coarsening during extrusion and exhibit behavior similar to coarse-grained Cu.
Article
Materials Science, Multidisciplinary
Yiqing Wei, Jingwei Li, Daliang Zhang, Bin Zhang, Zizhen Zhou, Guang Han, Guoyu Wang, Carmelo Prestipino, Pierric Lemoine, Emmanuel Guilmeau, Xu Lu, Xiaoyuan Zhou
Summary: This study proposes a new strategy to modify microstructure by phase regulation, which can simultaneously enhance carrier mobility and reduce lattice thermal conductivity. The addition of Cu in layered SnSe2 induces a phase transition that leads to increased grain size and reduced stacking fault density, resulting in improved carrier mobility and lower lattice thermal conductivity.
Article
Materials Science, Multidisciplinary
Jia Chen, Zhengyu Zhang, Eitan Hershkovitz, Jonathan Poplawsky, Raja Shekar Bhupal Dandu, Chang-Yu Hung, Wenbo Wang, Yi Yao, Lin Li, Hongliang Xin, Honggyu Kim, Wenjun Cai
Summary: In this study, the structural origin of the pH-dependent repassivation mechanisms in multi-principal element alloys (MPEA) was investigated using surface characterization and computational simulations. It was found that selective oxidation in acidic to neutral solutions leads to enhanced nickel enrichment on the surface, resulting in reduced repassivation capability and corrosion resistance.
Article
Materials Science, Multidisciplinary
X. Y. Xu, C. P. Huang, H. Y. Wang, Y. Z. Li, M. X. Huang
Summary: The limited slip systems of magnesium (Mg) and its alloys hinder their wide applications. By conducting tensile straining experiments, researchers discovered a rate-dependent transition in the dislocation mechanisms of Mg alloys. At high strain rates, glissile dislocations dominate, while easy-glide dislocations dominate at low strain rates. Abundant glissile dislocations do not necessarily improve ductility.
Article
Materials Science, Multidisciplinary
M. S. Szczerba, M. J. Szczerba
Summary: Inverse temperature dependences of the detwinning stress were observed in face-centered cubic deformation twins in Cu-8at.%Al alloy. The detwinning stress increased with temperature when the pi detwinning mode was involved, but decreased when the pi/3 mode was involved. The dual effect of temperature on the detwinning stress was due to the reduction of internal stresses pre-existing within the deformation twins. The complete reduction of internal stresses at about 530 degrees C led to the equivalence of the critical stresses of different detwinning modes and a decrease in the yield stress anisotropy of the twin/matrix structure.
Article
Materials Science, Multidisciplinary
Taowen Dong, Tingting Qin, Wei Zhang, Yaowen Zhang, Zhuoran Feng, Yuxiang Gao, Zhongyu Pan, Zixiang Xia, Yan Wang, Chunming Yang, Peng Wang, Weitao Zheng
Summary: The interaction between the electrode and the electric double layer (EDL) significantly influences the energy storage mechanism. By studying the popular alpha-Fe2O3 electrode and the EDL interaction, we find that the energy storage mechanism of the electrode can be controlled by modulating the EDL.
Article
Materials Science, Multidisciplinary
Matthew R. Barnett, Jun Wang, Sitarama R. Kada, Alban de Vaucorbeil, Andrew Stevenson, Marc Fivel, Peter A. Lynch
Summary: The elastic-plastic transition in magnesium alloy Mg-4.5Zn exhibits bursts of deformation, which are characterized by sudden changes in grain orientation. These bursts occur in a coordinated manner among nearby grains, with the highest burst rate observed at the onset of full plasticity. The most significant burst events are associated with twinning, supported by the observation of twinned structures using electron microscopy. The bursts are often preceded and followed by a stasis in peak movement, indicating a certain "birth size" for twins upon formation and subsequent growth at a later stage.
Article
Materials Science, Multidisciplinary
Vaidehi Menon, Sambit Das, Vikram Gavini, Liang Qi
Summary: Understanding solute segregation thermodynamics is crucial for investigating grain boundary properties. The spectral approach and thermodynamic integration methods can be used to predict solute segregation behavior at grain boundaries and compare with experimental observations, thus aiding in alloy design and performance control.
Article
Materials Science, Multidisciplinary
Feiyu Qin, Lei Hu, Yingcai Zhu, Yuki Sakai, Shogo Kawaguchi, Akihiko Machida, Tetsu Watanuki, Yue-Wen Fang, Jun Sun, Xiangdong Ding, Masaki Azuma
Summary: This study reports on the negative and zero thermal expansion properties of Cd2Re2O7 and Cd1.95Ni0.05Re2O7 materials, along with their ultra-low thermal conductivity. Through investigations of their structures and phonon calculations, the synergistic effect of local structure distortion and soft phonons is revealed as the key to achieving these distinctive properties.
Article
Materials Science, Multidisciplinary
Thomas Beerli, Christian C. Roth, Dirk Mohr
Summary: A novel testing system for miniature specimens is designed to characterize the plastic response of materials for which conventional full-size specimens cannot be extracted. The system has an automated operation process, which reduces the damage to specimens caused by manual handling and improves the stability of the test results. The experiments show that the miniature specimens extracted from stainless steel and aluminum have high reproducibility, and the results are consistent with those of conventional-sized specimens. A correction procedure is provided to consider the influence of surface roughness and heat-affected zone caused by wire EDM.
Article
Materials Science, Multidisciplinary
Rani Mary Joy, Paulius Pobedinskas, Nina Baule, Shengyuan Bai, Daen Jannis, Nicolas Gauquelin, Marie-Amandine Pinault-Thaury, Francois Jomard, Kamatchi Jothiramalingam Sankaran, Rozita Rouzbahani, Fernando Lloret, Derese Desta, Jan D'Haen, Johan Verbeeck, Michael Frank Becker, Ken Haenen
Summary: This study investigates the influence of film microstructure and composition on the Young's modulus and residual stress in nanocrystalline diamond thin films. The results provide insights into the mechanical properties and intrinsic stress sources of these films, and demonstrate the potential for producing high-quality nanocrystalline diamond films under certain conditions.