Article
Chemistry, Multidisciplinary
Yuanyuan Shang, Claudio Pistidda, Chiara Milanese, Alessandro Girella, Alexander Schokel, Thi Thu Le, Annbritt Hagenah, Oliver Metz, Thomas Klassen, Martin Dornheim
Summary: This manuscript proposes a method for obtaining high-quality NaAlH4 from automotive recycled alloy, and comprehensively explores its hydrogen storage properties using various experimental techniques. The results show that NaAlH4 with comparable properties to high-purity commercial NaAlH4 was successfully synthesized.
Article
Chemistry, Physical
Andrew J. E. Rowberg, Leigh Weston, Chris G. Van de Walle
Summary: The oxyhydrides in the series La2-ySryLiH1+ O-y(3-y) are attractive as solid-state hydride electrolytes, with La2LiHO3 showing promise in working fuel cells. However, stability issues arise, particularly in Sr2LiH3O due to anion antisites and H vacancies. Careful synthesis conditions can lead to higher ionic conductivity in Sr2LiH3O by promoting V-H(+) defects.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Hyung Wan Do, HyeonJi Kim, Eun Seon Cho
Summary: With the increasing importance of hydrogen in decarbonization, solid-state hydrogen storage has become a pressing need. This study investigates the hydrogen storage performance and stability of sodium alanate in a nanoporous graphene oxide framework, demonstrating lower desorption temperature and activation energy, while maintaining stability under ambient conditions.
Article
Chemistry, Multidisciplinary
Yang Yu, Jintao Wang, Zhaoxian Qin, Yingtong Lv, Qijun Pei, Khai Chen Tan, Tengfei Zhang, Anan Wu, Teng He, Hui Wu, Andrew S. Lipton, Ping Chen
Summary: Replacing liquid electrolytes with solid-state electrolytes can solve the safety issues in sodium-ion batteries. However, challenges still exist in finding solid-state electrolytes with high ionic conductivity and stability. Researchers have fabricated sodium carbazolide and its THF-coordinated derivatives as fast sodium conductors with excellent interfacial stability. The evaporation of THF is found to play a crucial role in facilitating the migration of sodium ions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Xin Zhang, Yukai Lin, Lingchao Zhang, Zhenguo Huang, Limei Yang, Zhenglong Li, Yaxiong Yang, Mingxia Gao, Wenping Sun, Hongge Pan, Yongfeng Liu
Summary: Sodium alanate (NaAlH4) has poor kinetics and reversibility in hydrogen storage due to high energy barriers, but transition metal-based catalysts can effectively reduce these barriers. In this study, we successfully synthesized TiC nanoparticles with a size of 2-4 nm supported on carbon (nano-TiC@C), which exhibited high and stable catalytic activity for NaAlH4. The nano-TiC@C-containing NaAlH4 released 5 wt% H2 starting from 65 °C and reabsorbed all released hydrogen at 30 °C under 100 bar H2, outperforming NaAlH4 modified by commercial TiC nanoparticles. This finding provides insights into designing high-performance catalytic additives for light-metal hydride-based hydrogen storage materials.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Xiaoyu Xu, Yumei Wang, Qiang Yi, Xinyu Wang, Ramon Alberto Paredes Camacho, Hans Kungl, Ruediger Eichel, Li Lu, Huangwei Zhang
Summary: Sodium-ion batteries (SIBs) are considered as alternatives to lithium-ion batteries (LIBs) due to their abundant sodium sources and low cost. However, SIBs still face safety issues with their highly flammable liquid organic electrolytes (LOEs). Composite polymer electrolytes (CPEs), composed of inorganic solid electrolytes (ISEs) and solid polymer electrolytes (SPEs), have gained attention as promising electrolytes due to their higher safety level and flexibility. This Review focuses on the recent investigations and development of CPEs to overcome the unsatisfactory ionic conductivities for practical application.
Article
Chemistry, Physical
Kenneth Tuul, Rasmus Palm, Jaan Aruvali, Enn Lust
Summary: In order to utilize hydrogen as an energy carrier in renewable energy driven economy, more efficient hydrogen storage technologies need to be developed. Solid-state hydrogen storage in complex metal hydrides, such as NaAlH4, has shown promising results. The use of NaAlH4/mesoporous carbon black composites with high NaAlH4 content (50-90 wt%), prepared via ball milling, has demonstrated lower dehydrogenation temperatures and partial hydrogenation capabilities. The study provides insight into the fundamental processes of H2 release and uptake in these composites, particularly through the Na3AlH6 4 NaH transition.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Materials Science, Multidisciplinary
Jinyun Zheng, Wenjie Li, Xinxin Liu, Jiawei Zhang, Xiangming Feng, Weihua Chen
Summary: This review paper provides a comprehensive overview of the research progress in electrochemical and physical properties of gel polymer electrolyte-based sodium batteries. The authors summarize the gel polymer electrolytes based on different polymer hosts and describe their ionic conductivity, ion transference number, electrochemical window, thermal stability, mechanical property, and interfacial issue with electrodes. They also analyze and discuss the ion transport pathway and ion conduction mechanism. Additionally, the advanced gel polymer electrolyte systems with superior and functional performance are classified and summarized, and the application prospects, development opportunities, remaining challenges, and possible solutions are discussed.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Engineering, Environmental
Zhuanghe Ren, Xin Zhang, Zhenguo Huang, Jianjiang Hu, Yangzhong Li, Shiyou Zheng, Mingxia Gao, Hongge Pan, Yongfeng Liu
Summary: Nanosized TiH2 flakes were successfully synthesized through a one-pot solvothermal process and epitaxially grown on graphene surface. The generation of Cl· radicals and unsaturated C=C bonds during the reaction of TiCl4 with THF promoted the formation of TiH2. The nanoflake-like TiH2 enabled outstanding hydrogen storage performance of NaAlH4.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
M. Ismail, N. A. Ali, N. A. Sazelee, S. U. Muhamad, S. Suwarno, N. H. Idris
Summary: The effect of cobalt ferrite nanopowder on the dehydrogenation properties of sodium alanate was studied for the first time. The addition of cobalt ferrite significantly reduced the decomposition temperature of sodium alanate and enhanced the hydrogen release rate. This was attributed to the synergistic catalytic effect of new active species formed during the dehydrogenation process.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Naoto Toyomura, George Hasegawa, Kazuma Nishimi, Miki Inada, Naoya Enomoto, Katsuro Hayashi
Summary: Dense ceramics of Na3xLa2/3-xZrO3-delta with orthorhombic perovskite structure were prepared by spark plasma sintering to investigate their Na+ ion conducting behaviors. Despite suppressed Na volatilization, the Na component tends to be partially lost during sintering, limiting the chemical composition of the perovskite. Samples with specific compositions showed enhanced bulk conductivity and lower activation energy compared to isostructural titanate-derivative materials.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Physical
Z. Li, J. Z. Yu, Y. Zhang, D. M. Liu, C. Y. Wang, T. Z. Si, Y. T. Li, Q. A. Zhang
Summary: By utilizing a synergy strategy of confinement and metallic catalysis, NaAlH4 desorption close to room temperature was achieved for the first time, resulting in significant enhancements in hydrogen storage properties of complex hydrides.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Noratiqah Sazelee, Nurul Shafikah Mustafa, Muhammad Syarifuddin Yahya, Mohammad Ismail
Summary: Adding 10wt% spherical SrTiO3 catalyst can decrease the onset desorption temperature and enhance the desorption kinetics of NaAlH4. The decrease in apparent activation energy and improvement in desorption properties of NaAlH4 are attributed to the reduction of the physical structure of NaAlH4 by SrTiO3 during ball milling.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Engineering, Environmental
Thi-Thu Le, Mohsin Abbas, David M. Dreistadt, Thomas Klassen, Claudio Pistidda
Summary: In recent years, complex hydrides have attracted increasing interest for their potential applications in energy storage and conversion. This review provides a comprehensive overview of ionic conduction in complex hydrides and highlights possible approaches to enhance their ionic conductivity. Additionally, the use of complex hydrides as solid electrolytes for electrochemical conversion and storage applications is reviewed, along with the relationship between ionic conduction and hydrogen sorption properties.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Yinger Xiang, Xinyu Hu, Xue Zhong, Wentao Deng, Guoqiang Zou, Hongshuai Hou, Xiaobo Ji
Summary: This study proposes a strategy of hierarchical double carbon/Sb composite to enhance the performance of Sb anode. The composite employs carbon spheres to encapsulate Sb nanoparticles with strong interfacial chemical bonds, and utilizes graphene as a conductive network to connect the composite materials. The hierarchical double carbon/Sb composite shows excellent rate and long cycling performance, and provides theoretical guidance for the development of metal anodes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
K. Fukutani, J. Yoshinobu, M. Yamauchi, T. Shima, S. Orimo
Summary: Hydrogen has three aspects of characteristics and high reactivity towards hydrogenation reactions. Utilizing these active hydrogen species for hydrogenation reactions holds the promise of achieving chemical transformations. Additionally, electron transfer also plays an important role.
Article
Chemistry, Physical
R. Utsumi, M. Morimoto, H. Saitoh, T. Watanuki, T. Sato, S. Takagi, S. Orimo
Summary: The researchers synthesized metal hydrides comprising only metals with low hydrogenation affinity which cannot form metal hydrides below 1 GPa. By clarifying the hydrogenation reaction processes of FexMo1-x alloys, they were able to classify the reaction process into three types and synthesize two novel hydrides, one of which has metal elements at the vertices of hexagonal close-packed lattices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Andreas Zuettel, Noris Gallandat, Paul J. Dyson, Louis Schlapbach, Paul W. Gilgen, Shin-Ichi Orimo
Summary: Fossil fuels and materials are finite resources, and waste disposal has a global environmental impact. Using Switzerland as a case study, the technical and economic challenges of transitioning to an energy economy based on renewable energy were analyzed. Three energy system approaches for substituting fossil fuels with renewables were considered: purely electric system with battery storage, hydrogen system, and synthetic hydrocarbon system.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Multidisciplinary Sciences
Manjit Singh Grewal, Kazuaki Kisu, Shin-ichi Orimo, Hiroshi Yabu
Summary: This study presents hexagonal arranged porous scaffolds for holding prototype polyethylene glycol-based composite electrolytes containing solvate ionic liquid, which exhibit appealing electrochemical and thermal properties, indicating their potential as safer rechargeable lithium-ion battery electrolytes. The porous scaffolds improve the electrochemical performance of polymer electrolytes, with both molecular design and porous micro-structures being crucial for enhancing performance.
Article
Chemistry, Physical
Rama Srinivas Varanasi, Motomichi Koyama, Hiroyuki Saitoh, Reina Utsumi, Toyoto Sato, Shin-ichi Orimo, Eiji Akiyama
Summary: The phase transformations and microstructure changes during the depressurization of non-hydrogenated and hydrogenated Fe-Mn-Si-Cr alloy were investigated. Understanding the effects of hydrogenation on the stability of the austenite phase in Fe-based alloys is crucial.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Biochemistry & Molecular Biology
Toyoto Sato, Hiroyuki Saitoh, Reina Utsumi, Junya Ito, Yuki Nakahira, Kazuki Obana, Shigeyuki Takagi, Shin-ichi Orimo
Summary: In this study, the hydrogen absorption reaction of LaNi5 under high pressures above 1 GPa was investigated, and it was found that LaNi5 absorbed 2.07% hydrogen at 6 GPa, indicating a higher hydrogen storage capacity compared to reactions below 1.0 MPa. Additionally, the hydrogen-absorbed LaNi5Hx decomposed into NiH under high-pressure conditions, and a new hydride phase with different crystal parameters was observed.
Article
Chemistry, Physical
Ryuhei Sato, Kazuto Akagi, Shigeyuki Takagi, Kartik Sau, Kazuaki Kisu, Hao Li, Shin-ichi Orimo
Summary: Topological data analysis based on persistent homology is applied to the molecular dynamics simulation of the AgI a-phase to analyze the ion migration mechanism effectively. The persistence diagrams of a-AgI record the shape and size of the ring structures in the atomic configurations, clearly showing the emergence of four-membered rings formed by two Ag and two I ions at high temperatures, which are common structures during the Ag ion migration. The potential energy change due to the deformation of the four-membered ring agrees well with the activation energy calculated from the conductivity Arrhenius plot, and the concerted motion of two Ag ions via the four-membered ring is successfully extracted from molecular dynamics simulations, providing new insight into the specific mechanism of the concerted motion.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Katsuaki Sugawara, Haruki Kusaka, Tappei Kawakami, Koki Yanagizawa, Asuka Honma, Seigo Souma, Kosuke Nakayama, Masashi Miyakawa, Takashi Taniguchi, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Takashi Takahashi, Shin-ichi Orimo, Masayuki Toyoda, Susumu Saito, Takahiro Kondo, Takafumi Sato
Summary: Boron-based two-dimensional materials, especially rhombohedral boron monosulfide (r-BS), with its unique layered crystal structure, are being extensively studied for their potential applications in nanoelectronics. However, the analysis of the fundamental electronic properties of r-BS has been limited due to the lack of available large crystals. In this study, we utilize microfocused angle-resolved photoemission spectroscopy (micro-ARPES) to directly map the band structure of a tiny r-BS powder crystal, revealing that r-BS is a p-type semiconductor with an anisotropic in-plane effective mass and a band gap larger than 0.5 eV. These findings demonstrate the high applicability of micro-ARPES for investigating small powder crystals and provide new insights into the unexplored electronic states of novel materials.
Article
Chemistry, Multidisciplinary
Kazuaki Kisu, Rana Mohtadi, Shin-i. Orimo
Summary: Rechargeable Ca metal batteries have advantageous features for potential alternatives to Li-ion batteries, such as high energy density, cost-effectiveness, and natural elemental abundance. However, challenges in passivating Ca metal by electrolytes and a lack of efficient cathode materials with Ca2+ storage capabilities hinder the development of practical Ca metal batteries. In this study, the feasibility of using a CuS cathode and a tailored electrolyte for Ca metal batteries is confirmed, leading to a Ca metal battery with long cycle life and high capacity retention. This study can expedite the development of Ca metal batteries.
Article
Chemistry, Physical
Egon Campos dos Santos, Ryuhei Sato, Kazuaki Kisu, Kartik Sau, Xue Jia, Fangling Yang, Shin-ichi Orimo, Hao Li
Summary: The need for next-generation batteries is urgent. Divalent closo-type complex hydride (CTCH) electrolytes have been shown to offer valuable alternatives to lithium-ion technology. However, the complex structure of neutral molecules containing CTCHs poses challenges for understanding ionic diffusion mechanisms and designing high-performance batteries. This study combines a genetic algorithm and ab initio simulations to analyze cation diffusions in various CTCHs, leading to the development of structure-performance relationships and paving the way for precise modeling of complex materials.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
V. Charbonnier, R. Utsumi, Y. Nakahira, H. Enoki, K. Asano, H. Kim, T. Sato, S. Orimo, H. Saitoh, K. Sakaki
Summary: For high pressure MH compressor applications, it is important to understand the hydrogenation properties of MH forming compounds under high pressure and temperature conditions, which are still little studied. This study investigated a Ti0.90V0.30Mn1.00Ni0.80 compound with an AB2 structure using Sieverts' method, providing experimental evidence of the non-ideal behavior of hydrogen in the high-pressure region. The study also demonstrated the estimation of high-sorption pressures using low-pressure data and monitored the structural evolution of the compound under ultra-high hydrogen pressure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Akira Kudo, Kazuya Kanamaru, Jiuhui Han, Rui Tang, Kazuaki Kisu, Takeharu Yoshii, Shin-ichi Orimo, Hirotomo Nishihara, Mingwei Chen
Summary: This study reports the fabrication of hierarchically porous carbon microlattices (HPCMLs) using composite photoresin and stereolithography (SLA) 3D printing. The carbon microlattices have a hierarchical pore structure, including lattice architecture, macropores, mesopores, and micropores. The HPCMLs exhibit excellent mechanical properties and can be used as thick supercapacitor electrodes with high gravimetric and areal capacitances.
Article
Materials Science, Multidisciplinary
Kartik Sau, Shigeyuki Takagi, Tamio Ikeshoji, Kazuaki Kisu, Ryuhei Sato, Shin-ichi Orimo
Summary: Using molecular dynamics (MD) simulations, we investigated the effect of cation size on the ordered-disordered phase-transition temperature (T-tran) and cationic diffusion in the complex hydride LiCB11H12. The results showed that introducing a large-size cation with high cell volume can lower T-tran by facilitating anionic rotation. The study also provided insights into cationic density distribution, bottlenecks in the cationic path, and the hopping mechanism with increasing cationic sizes.
MATERIALS ADVANCES
(2023)
Article
Physics, Multidisciplinary
Yoshinori Ohmasa, Shigeyuki Takagi, Kento Toshima, Kaito Yokoyama, Wataru Endo, Shin-ichi Orimo, Hiroyuki Saitoh, Takeshi Yamada, Yukinobu Kawakita, Kazutaka Ikeda, Toshiya Otomo, Hiroshi Akiba, Osamu Yamamuro
Summary: The structures and dynamics of Li(5)MoH(11) and Li6NbH11, including the dynamics of hydrogen atoms, were investigated using QENS and neutron powder diffraction. It was found that there is a wide relaxation time distribution for the hydrogen atoms, which is influenced by the positional disorder of surrounding ions and the deformation of MH9 anions.
PHYSICAL REVIEW RESEARCH
(2022)
Review
Energy & Fuels
Erika Michela Dematteis, Mads B. Amdisen, Tom Autrey, Jussara Barale, Mark E. Bowden, Craig E. Buckley, Young Whan Cho, Stefano Deledda, Martin Dornheim, Petra de Jongh, Jakob B. Grinderslev, Goekhan Gizer, Valerio Gulino, Bjorn C. Hauback, Michael Heere, Tae Wook Heo, Terry D. Humphries, Torben R. Jensen, Shin Young Kang, Young-Su Lee, Hai-Wen Li, Sichi Li, Kasper T. Moller, Peter Ngene, Shin-ichi Orimo, Mark Paskevicius, Marek Polanski, Shigeyuki Takagi, Liwen Wan, Brandon C. Wood, Michael Hirscher, Marcello Baricco
Summary: This review paper provides an overview of the intense literature and research efforts on complex hydrides for energy storage applications. It focuses on recent advances in different complex hydride systems from the collaborative activities of research groups led by experts of the Task 40 'Energy Storage and Conversion Based on Hydrogen' of the International Energy Agency. The paper reviews materials design, synthesis, tailoring, modelling approaches, hydrogen release and uptake mechanisms, and thermodynamic aspects to define new trends and suggest new possible applications for these highly tuneable materials.
PROGRESS IN ENERGY
(2022)
