Article
Chemistry, Multidisciplinary
YongJun Cho, Sichi Li, Jonathan L. Snider, Maxwell A. T. Marple, Nicholas A. Strange, Joshua D. Sugar, Farid El Gabaly, Andreas Schneemann, Sungsu Kang, Min-ho Kang, Hayoung Park, Jungwon Park, Liwen F. Wan, Harris E. Mason, Mark D. Allendorf, Brandon C. Wood, Eun Seon Cho, Vitalie Stavila
Summary: The study demonstrates a new approach to thermodynamically stabilizing metastable metal hydrides by coordinating them with nitrogen binding sites within nanopores. This allows for low-temperature hydrogen release and regeneration of LiAlH4 at high pressure, with a predicted decrease in Al-H bond dissociation energy. Additionally, solid-state reversibility is achieved through a combination of nanoconfinement effects, Li adatom formation, and charge redistribution between the metal hydride and the host.
Article
Chemistry, Inorganic & Nuclear
Sheng Wei, Shunshun Xue, Chaoshi Huang, Boyi Che, Huanzhi Zhang, Lixian Sun, Fen Xu, Yongpeng Xia, Riguang Cheng, Chenchen Zhang, Tao Wang, Wenlong Cen, Yucao Zhu, Qingfeng Zhang, Hailiang Chu, Bin Li, Kexiang Zhang, Shiyou Zheng, Federico Rosei, Hiroshi Uesugi
Summary: The study found that adding NiFe2O4@h-BN composite material significantly improves the dehydrogenation and rehydrogenation performance of LiAlH4, increasing hydrogen release and absorption efficiency. Doped LiAlH4 showed enhanced hydrogen desorption and absorption capacities under certain conditions.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Review
Chemistry, Physical
N. A. Sazelee, M. Ismail
Summary: LiAlH4 is considered a potential material for solid-state hydrogen storage due to its high hydrogen content, but challenges like high decomposition temperature and slow dehydrogenation hinder its wider applications. Methods such as mechanical milling and catalyst doping have shown improvements in efficiency, but further technological advancements are needed to meet expected goals.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Juan Rogelio Tena-Garcia, Alejandro Casillas-Ramirez, Ricardo Guerrero-Ortiz, David Ricardo Poire de la Cruz, Karina Suarez-Alcantara
Summary: The dehydrogenation temperature of LiAlH4 can be significantly reduced by producing mixtures with ZrCl4 through ball milling at low temperatures. This method allows for efficient hydrogen release by achieving small aggregate size and preventing substantial decomposition. However, the LiAlH4/ZrCl4 mixtures are unstable and difficult to handle. The dehydrogenation pathway is changed in the mixtures, resulting in the formation of Al, LiCl, Zr, and H2 as the main products.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Na Yang, Huchen Yao, Fanqi Bu, Mengyue Gu, Xuewen Zhao, Lei Huang, Chonghan Zhao, Yonghong Cheng, Jinying Zhang
Summary: Hydrolysis of LiAlH4 is a promising way to produce hydrogen at low temperatures, and an anti-icing aqueous solution is necessary. In this study, an optimized solution containing 27.1% KOH and 30.0% ethylene glycol was found to achieve full and controllable hydrolysis kinetics of LiAlH4 at -40 to 0 degrees C. The effects of compactness, mass, and temperature on the hydrolysis were investigated, and it was observed that the reaction followed the shrinking core model controlled by liquid film diffusion.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Chunmin Zhang, Long Liang, Shaolei Zhao, Zhijian Wu, Shaohua Wang, Dongming Yin, Qingshuang Wang, Limin Wang, Chunli Wang, Yong Cheng
Summary: In this study, rare earth oxide nano-CeO2 additives with different morphologies (nanoparticles, nanocubes, and nanorods) were prepared by the hydrothermal method, and their intrinsic properties were characterized. The addition of nano-CeO2 to LiAlH4 improved its dehydrogenation behavior, with the LiAlH4-CeO2-nanorod composite exhibiting the optimal dehydrogenation behavior. The hydrogen release was facilitated by the in-situ formed CeH2.73 and the facile transition between the oxidation states of Ce4+ and Ce3+.
Article
Chemistry, Physical
M. Ismail, N. A. Ali, N. A. Sazelee, S. Suwarno
Summary: In this study, aluminum titanate was used as an additive to improve the dehydrogenation properties of lithium alanate. The results showed that the addition of 5 wt.% aluminum titanate significantly lowered the decomposition temperature and enhanced the desorption kinetics of lithium alanate. The alkali titanate-doped lithium alanate was able to release a higher amount of hydrogen at lower temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
M. A. N. Ahmad, N. A. Sazelee, N. A. Ali, M. Ismail
Summary: In this study, K2NiF6 was used as an additive to improve the dehydrogenation properties of LiAlH4. The addition of K2NiF6 significantly reduced the decomposition temperature and enhanced the dehydrogenation kinetics of LiAlH4. The morphology study showed that the LiAlH4 particles became smaller and less agglomerated when K2NiF6 was added. The in situ formation of new phases during the dehydrogenation process, as well as a reduction in particle size, were believed to contribute to the improved dehydrogenation characteristics of LiAlH4.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
J. R. Tena-Garcia, A. Casillas-Ramirez, K. Suarez-Alcantara
Summary: Mixtures of LiAlH4/FeCl2 and LiBH4/FeCl2 were prepared under cryogenic conditions using ball milling, with the optimal production conditions being milling for 30 minutes at -196 degrees C and 15 Hz oscillation frequency. Hydrogen release in LiAlH4/FeCl2 mixtures starts at around 60 degrees C, while LiBH4/FeCl2 mixtures exhibit dehydrogenation starting at 40 degrees C and finishing at about 300 degrees C. The formation of LiCl is considered the driving force behind the decomposition reactions in these reactive mixtures. Cryogenic ball-milling has a positive effect on production and low-temperature dehydrogenation of the studied samples.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yiting Bu, Lixian Sun, Fen Xu, Sheng Wei, Federico Rosei, Yumei Luo, Zhaoyu Liu, Jiaxi Liu, Chenchen Zhang, Yuan Yao
Summary: By adding Ni-Ti-NC, the hydrogen absorption capacity and dehydrogenation behavior of LiAlH4 were significantly improved, with lowered dehydrogenation temperature, reduced activation energies, and increased hydrogen release rate. The addition of Ni-Ti-NC also enhanced the hydrogen absorption capacity of LiAlH4 at high pressure and constant temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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
Chemistry, Multidisciplinary
Nurul Amirah Ali, Muhammad Amirul Nawi Ahmad, Muhammad Syarifuddin Yahya, Noratiqah Sazelee, Mohammad Ismail
Summary: The effect of nanosized CoTiO3 additive on the desorption behavior of LiAlH4 was investigated for the first time in this study. The addition of CoTiO3 improved the desorption behavior of LiAlH4, reducing the desorption temperature and increasing the desorption rate. The experimental results suggest that the CoTiO3 additive promoted notable advancements in the desorption performance of LiAlH4 through the in situ-formed active species.
Article
Chemistry, Physical
Nurul Yasmeen Yusnizam, Nurul Amirah Ali, Noratiqah Sazelee, Mohammad Ismail
Summary: This research aims to investigate the effect of adding titanium silicate (TiSiO4) on the dehydrogenation behavior of lithium alanate (LiAlH4). The addition of 10 wt% TiSiO4 resulted in lower dehydrogenation temperatures for LiAlH4, with the first-step reaction occurring at 92 degrees C and the second-step reaction at 128 degrees C. The TiSiO4-added LiAlH4 composite was able to release more hydrogen (about 6.0 wt%) compared to undoped LiAlH4 at 90 degrees C for 2 hours. The addition of TiSiO4 also reduced the activation energies for hydrogen liberation from LiAlH4.
