A significant temperature raise within hydrogen vehicle cylinder during the fast filling process will be observed, while the strength and fatigue life of the cylinder will dramatically decrease at high temperature. In...A significant temperature raise within hydrogen vehicle cylinder during the fast filling process will be observed, while the strength and fatigue life of the cylinder will dramatically decrease at high temperature. In order to evaluate the strength and fatigue of composite hydrogen storage vessel, a 70-MPa fatigue test system using hydrogen medium was set up. Experimental study on the fatigue of composite hydrogen storage vessels under real hydrogen environment was performed. The experimental results show that the ultimate strength and fatigue life both decreased obviously compared with the values under hydraulic fatigue test. Furthermore, fatigue property, failure behavior, and safe hydrogen charging/discharging working mode of onboard hydrogen storage vessels were obtained through the fatigue tests.展开更多
As a promising candidate material for hydrogen storage, ammonia borane(NH3BH3) has attracted significant interest in recent years due to its remarkably high hydrogen content. Subjecting this material to high pressure ...As a promising candidate material for hydrogen storage, ammonia borane(NH3BH3) has attracted significant interest in recent years due to its remarkably high hydrogen content. Subjecting this material to high pressure not only enables the formation of novel phases and compounds with exotic properties, but also improves our basic understanding of material's behavior at different levels of atomic and molecular interactions. This review focuses on the perspective of high-pressure chemical hydrogen storage related to NH3BH3-based materials. Four main aspects are discussed: the structures and bonding of NH3BH3 over a wide pressure–temperature space, thermolysis of NH3BH3 at high pressure, the formation of a novel high-pressure H-rich compound as a result of storage of additional molecular H2 in NH3BH3, and the potential rehydrogenation of the thermally decomposed NH3BH3 under the extreme of pressure.展开更多
Aluminum hydride(AlH_(3))is a covalently bonded trihydride with a high gravimetric(10.1 wt%)and volumetric(148 kg·m^(-3))hydrogen capacity.AlH_(3)decomposes to Al and H_(2)rapidly at relatively low temperatures,i...Aluminum hydride(AlH_(3))is a covalently bonded trihydride with a high gravimetric(10.1 wt%)and volumetric(148 kg·m^(-3))hydrogen capacity.AlH_(3)decomposes to Al and H_(2)rapidly at relatively low temperatures,indicating good hydrogen desorption kinetics at ambient temperature.Therefore,AlH_(3)is one of the most prospective candidates for high-capacity hydrogen storage materials.Firstly,this review briefly summarizes the basic chemical and physical characteristics of AlH_(3).Then,its synthesis,dehydrogenation thermodynamics and kinetics,regeneration and methods for improving reversibility of hydriding are described with the aim of applying this material for hydrogen storage.In accordance with the fact that AlH_(3)is generally formed by reacting Al with H_(2)at extremely high hydrogen pressure,the high-pressure study of this hydride is discussed in detail.Finally,the advantages,weaknesses,critical technical challenges and outlook of this field are discussed.展开更多
文摘A significant temperature raise within hydrogen vehicle cylinder during the fast filling process will be observed, while the strength and fatigue life of the cylinder will dramatically decrease at high temperature. In order to evaluate the strength and fatigue of composite hydrogen storage vessel, a 70-MPa fatigue test system using hydrogen medium was set up. Experimental study on the fatigue of composite hydrogen storage vessels under real hydrogen environment was performed. The experimental results show that the ultimate strength and fatigue life both decreased obviously compared with the values under hydraulic fatigue test. Furthermore, fatigue property, failure behavior, and safe hydrogen charging/discharging working mode of onboard hydrogen storage vessels were obtained through the fatigue tests.
基金supported by United States Department of Energy through the Stanford Institute for Materials and Energy Science(DE-AC02-76SF00515)
文摘As a promising candidate material for hydrogen storage, ammonia borane(NH3BH3) has attracted significant interest in recent years due to its remarkably high hydrogen content. Subjecting this material to high pressure not only enables the formation of novel phases and compounds with exotic properties, but also improves our basic understanding of material's behavior at different levels of atomic and molecular interactions. This review focuses on the perspective of high-pressure chemical hydrogen storage related to NH3BH3-based materials. Four main aspects are discussed: the structures and bonding of NH3BH3 over a wide pressure–temperature space, thermolysis of NH3BH3 at high pressure, the formation of a novel high-pressure H-rich compound as a result of storage of additional molecular H2 in NH3BH3, and the potential rehydrogenation of the thermally decomposed NH3BH3 under the extreme of pressure.
基金financially supported by the National Natural Science Foundation of China(Nos.51901080 and U1601212)the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(No.51621001)Guangdong Basic and Applied Basic Research Foundation(No.2019A1515010039)。
文摘Aluminum hydride(AlH_(3))is a covalently bonded trihydride with a high gravimetric(10.1 wt%)and volumetric(148 kg·m^(-3))hydrogen capacity.AlH_(3)decomposes to Al and H_(2)rapidly at relatively low temperatures,indicating good hydrogen desorption kinetics at ambient temperature.Therefore,AlH_(3)is one of the most prospective candidates for high-capacity hydrogen storage materials.Firstly,this review briefly summarizes the basic chemical and physical characteristics of AlH_(3).Then,its synthesis,dehydrogenation thermodynamics and kinetics,regeneration and methods for improving reversibility of hydriding are described with the aim of applying this material for hydrogen storage.In accordance with the fact that AlH_(3)is generally formed by reacting Al with H_(2)at extremely high hydrogen pressure,the high-pressure study of this hydride is discussed in detail.Finally,the advantages,weaknesses,critical technical challenges and outlook of this field are discussed.
