INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·Vol. 47
·期 84
·35737-35746
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IF 7.139
Heng Lu,Jianbo Li,Tianyu Xie,Yu'an Chen,Yangfan Lu,Zhongqing Liu,Qian Li,Fusheng Pan
While borohydrides , such as NaBH 4 , were often used as supplements to improve hydrogen storage properties of Mg/MgH 2 systems, they have long suffered from high decomposition temperature and irreversible dehydrogenation process. Here, we report that NaBH 4 can reversibly serve as a hydrogen storage host and reactant for Mg/MgH 2 systems under mild reaction conditions with the help of Al/AlH 3 . 90 wt%MgH 2 –5 wt.%AlH 3 –5 wt.%NaBH 4 (M-5AB) has been successfully synthesized using the conventional mechanical alloying technique. The dehydrogenation activation energy and enthalpy are 20% and 9% reduced than those of pure Mg/MgH 2 . After 10 hydrogen absorption and desorption cycles, the hydrogen storage capacity of M-5AB can reach 6.35 wt%. The X-ray diffraction (XRD) and the transmission electron microscope (TEM) measurements revealed that the interface of additives and Mg/MgH 2 decompose to Mg 17 Al 12 , MgAlB 4 and NaH phases. The Mg 17 Al 12 and MgAlB 4 phases reduces the barrier of free energies of hydrogenated and dehydrogenated states, helping NaBH 4 to recover after rehydrogenation. These discoveries indicate that Al species can boost the decomposition and reformation of NaBH 4 , providing a wider degree of freedom for the material design of Mg-based hydrogen storage materials .
研究领域:
材料科学
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氢气储存
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能源材料
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固态化学
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DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Peihui Xu,Xueling Yuan,Jianzhong Liu,Hui Liu,Junhu Zhou
Aluminum hydride (alane, AlH 3 ) is a promising energetic material that can significantly increase the specific impulse of propellants while lowering the combustion temperature. In this work, a CO 2 laser was adopted to investigate the effect of α-AlH 3 content on the ignition and combustion characteristics of AlH 3 –Al, AlH 3 –ammonium perchlorate (AP), AlH 3 –Al–AP, and AlH 3 –Al–AP–hydroxyl-terminated polybutadiene (HTPB) mixtures (namely, samples D Al , D AP , T, and Q, respectively). The D Al samples formed a mushroom flame at the beginning of combustion due to the Kelvin-Helmholtz effect under the heat flow generated by the combustion of H 2 released from AlH 3 . The rapid hydrogen release caused the flame to break away from the sample to form a “dark zone”, whose height gradually shortened. The high AlH 3 content promoted the decomposition of HTPB to C 4 species, resulting in a “dark zone” for Q samples during ignition. The D AP and T samples combusted intensely with lower ignition delay time ( t i ) and combustion time ( t c ) and higher maximum combustion temperature ( T max ) than the other two samples due to the AP. The combustion temperatures of the mixed samples were effectively decreased, while the combustion rates were also accelerated by partially replacing Al with AlH 3 . As the rate of AlH 3 :Al was increased from 1:3 to 3:1, the T max of the D Al , T, and Q samples decreased by 113, 276, and 128 K, respectively, whereas t c decreased by 16.18 %, 32.11 %, and 8.18 %, respectively. However, the t i of the Q samples increased with increasing AlH 3 , probably because a large amount of hydrogen release exacerbated the effect of the porous layer, thus hindering the escape of the gas phase products. In addition, only weak Al(g) characteristic emission spectra were observed during combustion, which is due to the HTPB adhesion largely inhibiting the combustion of metallic fuels.
研究领域:
能源材料科学
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燃烧学
·
推进剂技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Jiaguang Zheng,Xuezhang Xiao,Yan He,Man Chen,Meijia Liu,Shouquan Li,Lixin Chen
The Mg(BH 4 ) 2 -AlH 3 - x LiH ( x = 0, 0.5, 1) novel ternary composites have been synthesized through mechanical ball milling, their favorable dehydrogenation properties and mechanism have been experimentally investigated. It can be found that during ball milling, a slight amount of Mg(BH 4 ) 2 would react with LiH and transform into LiBH 4 , while most Mg(BH 4 ) 2 remained stable after ball milling. Two major dehydrogenation steps can be detected in the Mg(BH 4 ) 2 -AlH 3 - x LiH composite, which belong to the decomposition of AlH 3 and Mg(BH 4 ) 2 , respectively. Remarkably, the onset hydrogen desorption temperature of Mg(BH 4 ) 2 -AlH 3 - x LiH composite can be reduced to 125.9 °C, with a total hydrogen desorption capacity of 10.3 wt%. It is worth emphasizing that the reversible dehydrogenation capacity is obviously improved to 3.8 wt%, compared to the Mg(BH 4 ) 2 -AlH 3 composite. This reversible capacity can be held for 3 cycles without obvious degeneration. Microstructural analysis on de/rehydrogenated composite has identified the regeneration of [BH 4 ] - in Mg(BH 4 ) 2 -AlH 3 -0.5LiH composite and revealed the role of LiH in the cycling hydrogen desorption and absorption processes. The formation of LiBH 4 and MgH 2 resulted from the rehydrogenation between MgAlB 4 and LiH could be helpful for the stability of reversible hydrogen storage performance.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Shiming Xu,Jintang Duan,Lianfang Feng,Xueping Gu,Cailiang Zhang,Liu Liu
The widespread implementation of hydrogen energy is critically constrained by the challenge of storage. Aluminum hydride (α-AlH 3 ), a binary hydride stable under ambient conditions with high volumetric hydrogen density, represents a promising candidate. However, when it is traditionally prepared from lithium aluminum hydride (LiAlH 4 ) and aluminum chloride (AlCl 3 ), the process is cost-prohibitive for scale-up. This study presents a cost-effective synthesis strategy by systematically investigating the effects of different molar ratios of LiAlH 4 /NaAlH 4 /AlCl 3 (4:0:1, 1:3:1, 0.5:3.5:1, 0:4:1). Results indicate that the introduction of LiAlH 4 significantly enhances reaction efficiency and kinetics. The optimal ratio of 1:3:1 effectively compensated for the slower kinetics of NaAlH 4 , achieving over 94% conversion of AlCl 3 to AlH 3 ·nEt 2 O etherate. Desolvation studies revealed that AlH 3 ·nEt 2 O derived from NaAlH 4 required higher temperatures for complete phase transformation, whereas systems with LiAlH 4 content below 25% were insufficient to effective desolvation. The α-AlH 3 crystals produced from the 1:3:1 ratio exhibited a well-defined cubic morphology and high thermal stability, with a decomposition temperature of 165 °C. By replacing 75% of the costly LiAlH 4 with NaAlH 4 , this hybrid approach achieved an approximately 50% reduction in the material cost. These findings provide critical process parameters and a viable pathway for the cost-effective, large-scale production of high-performance α-AlH 3 for hydrogen storage applications.
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产品关联
DOI
高影响因子
FirePhysChem
·
2024
·
IF 0
Jiashuai Wang,Bo Wu,Lingfeng Yang,Yuan Bian,Renjie Li,Ke Zeng,Juan Zhu,Liangyou Zhao,Jinpeng Shen,Chonghua Pei
Thermites are widely used in propellants, explosives and ignition materials because of their high heat release rate and good combustion efficiency. Structural control over thermites to achieve improved performance leads to a promising research area. Among these, core-shell structured composites have attracted wide attention due to their excellent properties and close contact among components. Herein, core-shell structured α -AlH 3 /Fe 2 O 3 thermites were prepared, which exhibit high heat-release and excellent combustion performance. At an equivalence ratio of 2.0, the core-shell structured α -AlH 3 /Fe 2 O 3 has the most heat release (1213.8 J/g) and the lowest reaction activation energy (147.5 kJ/mol). The ignited combustion performance of α -AlH 3 /Fe 2 O 3 was notably strengthened by the shorter ignition delay period (11 ms). Interestingly, the core-shell structured α -AlH 3 /Fe 2 O 3 was less sensitive to electrostatic discharge, which suggests that the core-shell structured α -AlH 3 /Fe 2 O 3 reaches the goal of high energy release and electrostatic safety. The core-shell thermite system with α -AlH 3 as metal fuel could provide an efficient alternative to hunt for thermites with high reactivity.
研究领域:
材料科学
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化学工程
·
能源技术
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DOI
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Heng Lu,Jianbo Li,Tianyu Xie,Xiang Zhou,Zhao Ding,Yangfan Lu,Yu’an Chen,Zhongqing Liu,Qian Li,Fusheng Pan
We report the synergistic catalytic effects of AlH3–TiF3 composites that can improve the kinetic properties of Mg-based hydrogen storage materials. The resulting MgH2–AlH3–TiF3 composites (MA-F) exhibit 5.55 wt % reversible hydrogen storage capacity with a reduced activation energy of 100.85 kJ/mol H2. The X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements revealed that the in situ generated Al* reacts with TiF3 and Mg, forming Al3Ti, AlF3, and Mg17Al12 during the heating process. Al3Ti and AlF3 act as the actual catalytically active centers for the hydrogen desorption and absorption processes, accelerating the reversible conversion between Mg and MgH2. Moreover, the presence of Mg17Al12 can narrow the free energy gap between the hydrogenated and dehydrogenated states, favoring the improvement of thermodynamic properties. These discoveries demonstrate the importance of the interaction between Mg/MgH2 and transition metal composites to improve the hydrogen storage functionalities.
研究领域:
材料科学
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氢气储存
·
能量存储
·
催化
·
纳米材料
✓ 已验证
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Yun Zhang,Wenjuan Li,Qing Pei,Xin Zhang,Zhuanghong Zhou,Sen Xu,Yanhua Lan,Fengyuan Jiao,Xueqiang Shi,Siyu Xu,Weiguo Cao
AlH 3 is considered to be the most promising high-energy additive and stearic acid (SA) is a common passivation coating material to enhance stability. To explore the effect of coating of SA on AlH 3 , flame propagation and reaction mechanisms are compared through ignition experiments and ReaxFF molecular dynamics, respectively. The flame propagation of AlH 3 /SA slowed down for ∼20 ms and the flame duration is longer for ∼50 ms, indicating that the combustion intensity is reduced. The combustion reaction of AlH 3 is initiated through the release of •H by H-Al breaking and further oxidizing to form H 2 O and Al-O clusters. The presence of SA results in more O and C atoms contained in the system and more reaction paths. The addition of C atoms and O atoms makes the maximum cluster molecular weight of AlH 3 /SA increase by 0.1 × 10^4 than AlH 3 . The results of flame propagation and reaction mechanisms verify that the stability of AlH 3 is improved by the coating of SA.
研究领域:
材料科学
·
燃烧化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Ming-Hui Yu,RuiXuan Xu,Wu-Xi Xie,Ya-Jin Li,Hong-Qi Nie,Qi-Long Yan
Aluminum hydride (AlH3) has attracted much attention due to its potential to replace aluminum (Al) as a novel energetic material in solid propellants. In this research, ammonium perchlorate (AP) and perfluoropolyether (PFPE) as functionalized coatings and a combination of acoustic resonance and spray drying technology have been employed to prepare AlH3@Al@AP (AHAPs) and AlH3@Al@AP@PFPE (AHAPs-F) energetic composite particles. The formulations of composite propellants and modified AlH3 particles were designed and fabricated. Their thermal reactivity, reaction heat, density, vacuum stability, combustion performance, and condensed combustion products (CCPs) have been systematically investigated. The results show that the solid propellants containing AHAPs (SP13) and AHAPs-F (SP14) composites can significantly enhance the reactivity and energy output compared to conventional solid propellants with the mechanical mixture Al/AlH3 (SP12). In particular, the total heat releases of SP13 and SP14 are almost 1.2 and 1.7 times higher than those of conventional ones (SP12, 1442 J g–1), respectively. Among the AlH3-based propellants, SP14 propellants exhibit the highest reaction heat of 5887 J g–1, the most intensive flame radiation of 31.4 × 103, and the highest combustion wave temperature of 2495 °C. Moreover, the particle size distribution of CCPs from SP14 propellants is much narrower and smaller than that of SP12, resulting in higher combustion efficiency.
研究领域:
材料科学
·
能源工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Long Liang,Chunli Wang,Mingan Ren,Shouliang Li,Zhijian Wu,Limin Wang,Fei Liang
The pivotal steps for the practical application of dehydrogenation of aluminum hydride (AlH3) have been to decrease the temperature and increase the content of AlH3. Herein, the initial dehydrogenation temperature of AlH3 decreased to 43 °C with the amount of released hydrogen of 8.3 wt % via introducing TiO2 and Pr6O11 with synergistic catalysis effects, and its apparent activation energy of the dehydrogenation reaction decreased to 56.1 kJ mol–1, which is 52% lower than that of pure AlH3. These differences in performances of the samples are further evaluated by determining the electron density of Al–H bonds during dehydrogenation. The multiple valence state conversions of TiO2 and Pr6O11 promoted the electron transfer of H in AlH3, and a novel dehydrogenation pathway of PrH2.37 formed simultaneously, which could accelerate the breakage of Al–H bonds. The density functional theory calculations further exhibit that there are fewer electrons around H in AlH3 and the Al–H bond energy is weaker at the atomic levels, which is more conducive to the release of hydrogen. A higher hydrogen storage capacity and a lower dehydrogenation temperature make AlH3 one of the most promising hydrogen source media for mobile applications.
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 47
·22729-22738
·
IF 3.925
Zhe Shi,Taojie Lu,Yidong Xu,Fei Shang,Yinghui Hu,Zhuo Wu,Jian Zhang,Zhaoyang Zhu,Jian Zheng,Kaifeng Lin,Yulin Yang
In this study, various polymer materials, such as polystyrene (PS), polymethyl acrylate (PMA), and polyvinyl pyrrolidone (PVP), are successfully encapsulated on the surface of alpha-aluminum hydride (α-AlH3) by the in situ polymerization method. The different polymers on the surface of α-AlH3 can lead to a tremendous enhancement of the material in terms of different properties. Due to the good heat resistance of PS, α-AlH3@PS composites take 625.25 min to lose 1% mass, and the activation energy increased by 11.72 kJ mol−1 compared with that before coating, showing good thermal stability. The high degree of cross-linking polymerization of PMA on the surface isolates α-AlH3 from an external environment, enabling it to maintain a high heat of combustion even after extreme humidity and heat treatment respectively. In addition, PVP has a high adsorption capacity for α-AlH3, which can not only improve the thermal and wet stability of α-AlH3 but also increase its electrostatic susceptibility from 24.6 mJ to 163.2 mJ. The in situ polymerization of encapsulated α-AlH3 has promising applications in aerospace and weapon fields, and the resulting α-AlH3@PVP has potential applications in solid propellant formulations.
研究领域:
材料科学
·
航空航天工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Chenlu Xue,Wei Gao,Haipeng Jiang,Jiafeng Cheng,Xiaoye Geng
The low-temperature hydrogen evolution and high explosion strength of AlH 3 pose significant fire and explosion risks for its industrial application. However, research on the explosion suppression performance and mechanism of AlH 3 is limited. KH 2 PO 4 and surfactant FS-50 are proven to effectively suppress Al and H 2 explosions, respectively. Herein, fluorine-phosphorus composite modified dry water (FPDW) is prepared by compounding KH 2 PO 4 and FS-50 using high-speed shear. F/P ratios has a significant suppression effect on AlH 3 explosion. As a concentration of 200 g/m 3 FPDW with a F/P ratio of 1:15 is added, the v avg of AlH 3 decreases to 1.03 m/s, p max drops to 0.47 MPa, and (d p /d t ) max reduces to 5.26 MPa/s. The critical suppression concentration of FPDW for AlH 3 is determined to be 300 g/m 3 . The results of reaction kinetics simulations confirm that F/P-containing radicals generated by the decomposition of FPDW will have a targeted trapping effect on AlH 3 flame radicals.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Haoyuan Zheng,Hua Ning,Chen Jin,Shuzhong Wang,Yadong Wang,Shixuan He,Haizhen Liu,Rui Tang,Xinhua Wang
α -phase AlH 3 , as a high-capacity hydrogen storage material (10.01 wt%), is often used in the hydrogen fuel cell industry. However, its high dehydrogenation temperature remains difficult to match with the operating temperature of proton exchange membranes. Designing efficient catalysts can effectively improve the dehydrogenation performance of AlH 3 , enabling low-temperature dehydrogenation by destabilizing it. In this work, a two-dimensional transition metal carbide V 4 C 3 with a layered structure was designed. Using V 4 AlC 3 as a precursor, two-dimensional V 4 C 3 was prepared via hydrofluoric acid etching. The AlH 3 –V 4 C 3 composite material was constructed by combining V 4 C 3 with AlH 3 through mild ball milling, which significantly enhanced the dehydrogenation performance of AlH 3 . With an optimal additive ratio (+3 wt% V 4 C 3 ), AlH 3 began to release hydrogen at temperatures as low as 47°C, exhibited a dehydrogenation peak temperature of only 110.2°C, and achieved a final hydrogen release capacity of 8.37 wt%. In isothermal dehydrogenation kinetic tests, the dehydrogenation capacity of V 4 C 3 -modified AlH 3 within 60 min at 120°C was significantly increased from 2.11 wt% to 7.50 wt%, and the activation energy for dehydrogenation was reduced from 88.5 kJ/mol to 35.7 kJ/mol, demonstrating remarkable improvement in isothermal dehydrogenation performance. The mechanism behind the improved dehydrogenation of AlH 3 by V 4 C 3 was investigated through a combination of characterization techniques and density functional theory (DFT) calculations. The results indicate that V 4 C 3 effectively weakens the Al-H bonds in AlH 3 , facilitates hydrogen dissociation, and alters the nucleation and growth mechanism of AlH 3 during dehydrogenation. Throughout the entire dehydrogenation process, V 4 C 3 remains chemically stable and enhances the dehydrogenation kinetics of AlH 3 via interfacial catalysis. The aforementioned approach effectively improves the overall dehydrogenation performance of AlH 3 , providing a novel paradigm for enhancing light-metal high-capacity hydrides.
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DOI
高影响因子
危险品化学品经营许可证（带存储）