Compaction of LiBH4-MgH2 doped with MWCNTs-TiO2 for reversible hydrogen storage

Plerdsranoy, Praphatsorn; Chanthee, Songwuit; Utke, Rapee

doi:10.1016/j.ijhydene.2016.11.066

Cited by 34 publications

(8 citation statements)

References 41 publications

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“…For instance, the in situ formed NaNdF 4 shifted the dehydrogenation onset temperature of NaBH 4 to ≈340 °C, and this system released more than 3 wt% of H 2 within 10 min at 400 °C 70d. The in situ formed core–shell Li x TiO 2 accelerated the de/rehydrogenation rates of the 2LiBH 4 ‐MgH 2 composite, which has intrinsic high gravimetric and volumetric densities of 14.3 wt% and ≈68 kg m −3 , respectively . In this work, ≈10 wt% of H 2 was released and absorbed within 50 and 15 min, respectively, at 400 °C 70d.…”

Section: Hydrogen Storagementioning

confidence: 96%

Complex Hydrides for Energy Storage, Conversion, and Utilization

2019

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functionalities and exhibit great potentials for the applications in the energy transfer chain (Figure 1).In chemistry, a hydride is a compound having negatively charged hydrogen anion. [2] Nowadays, however, hydrogenous compounds having hydrogen bonded to metals or nonmetal in ionic, metallic or covalent manner are collectively referred as hydrides. [3] Complex hydride is such a class of compound having a general formula of M(XH n ) m , where M is usually a metal cation and X is a metal or nonmetal element which sets up covalent or ionocovalent bonding with H. [4] The M[XH n ] m is H-rich and can decompose selectively to H 2 allowing complex hydrides of light-weight elements potential hydrogen storage media. As a matter of fact, since the pioneering work of Ti-catalyzed NaAlH 4 in 1997, [5] extensive investigations on hydrogen storage over alanates, [6] amide-hydride composites, [7] borohydrides, [8] amidoboranes [9] as well as metallorganic hydrides [10] were carried out and tremendous progress has been made (Figure 2). [1,4a] The break and setup of XH bonding would be endergonic and exergonic, respectively. The energy input and output in hydrogen desorption and reabsorption over a complex hydride depends strongly on its thermodynamic stability, which also offers an opportunity of using complex hydrides as thermal energy storage materials to cope up with the intermittent, fluctuating and unstable supply of renewable energies. Owning to their exclusive advantages of diversity, high energy densities and tunability, complex hydrides have been actively pursued for this application since year 2000. [11] Solid electrolytes with fast conduction of Li, Na, or Mg ions are highly demanded for all-solid-state batteries with high energy density and safety. Coincidentally, complex hydrides are composed of those cations and a relatively large sized [XH n ] anion. The coordination flexibility of the large anion with alkali or alkaline earth cation would create some favorable structural features, such as defects and/or low-barrier diffusion channels, to facilitate cation migration within the lattice of complex hydrides. [12] Starting from the finding of high Li-ion conduction in the high-temperature-phase LiBH 4 , [13] a variety of complex hydrides has been developed, some of which show superior ion conductivity to their nonhydride peers. [14] Hydrogen storage over complex hydride would undergo dihydrogen dissociation into surface H atoms followed by H Functional materials are the key enabling factor in the development of clean energy technologies. Materials of particular interest, which are reviewed herein, are a class of hydrogenous compound having the general formula of M(XH n ) m , where M is usually a metal cation and X can be Al, B, C, N, O, transition metal (TM), or a mixture of them, which sets up an iono-covalent or covalent bonding with H. M(XH n ) m is generally termed as a complex hydride by the hydrogen storage community. The rich chemistry between H and B/C/N/O/Al/TM allows complex hydrides of diverse compo...

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Section: Hydrogen Storagementioning

confidence: 96%

Complex Hydrides for Energy Storage, Conversion, and Utilization

2019

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“…The formation of MgB 2 is exothermic, which lowers the overall enthalpy of the dehydrogenation process to around 46 kJ/mol 81 . Afterward, the MgB 2 and LiH are hydrogenated at 5.0 MPa and 350°C to 400°C producing LiBH 4 and MgH 2 82 . Nevertheless, the kinetics of charge and discharge in pure metal hydride composites are extremely slow.…”

Section: Hydrogen Storage Technologiesmentioning

confidence: 99%

Hydrogen supply chain: Current status and prospects

Monteiro

Brito

2023

Energy Storage

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In the current world energy scenario with rising prices and climate emergencies, the renewable energy sources are essential for reducing pollution levels triggered by carbon‐based fuels. Hydrogen rises in the world energy scenario as an important non‐carbon‐based energy able to replace fossil fuels. For this reason, the rapid development of hydrogen‐related technology has been seen in recent years. This review paper covers hydrogen energy systems from fossil fuel‐based hydrogen production, biomass and power from renewable energy sources, to hydrogen storage in compressed gases, liquefied and solid materials, and hydrogen‐based power generation technology. It represents a quiet complete set of references that may be effective in increasing the prospects of hydrogen as a fuel in the coming years. The main conclusions drawn are that natural gas and coal supply nearly all of the current hydrogen. The commercially available technologies for hydrogen production are steam methane reforming, partial oxidation, and alkaline electrolysis. The most economical methods for hydrogen production are partial oxidation, steam methane reforming, coal gasification, and biomass gasification. Metallic cylindrical reservoirs are the most promising alternative to underground storage of compressed hydrogen at large scales. Some metal compounds and composites can store a significant amount of hydrogen while maintaining reasonable adsorption and desorption kinetics. The transportation sector is likely to see widespread use of hydrogen in the future, helping to reduce pollution. Vehicles can be powered by fuel cells, which are much more efficient than internal combustion engines. There are still several obstacles in the way of widespread hydrogen utilization. The first one is that the cost of producing hydrogen from low‐carbon sources is elevated. As the cost of renewable energy declines and hydrogen production is scaled up, it is anticipated that the hydrogen production costs would decrease over the next years. Innovative technologies are expected to increase the interest on thermochemical hydrogen production to massively substitute electrochemical technologies since they are theoretically cost‐effective. More research is needed to fix concerns with some of the thermochemical cycles in order to rise its maturity. Increasing the chemical reaction conversion ratios, which can be resolved utilizing nonequilibrium reactions, is one of them. The transportation sector is likely to see extensive use of hydrogen in the future, helping to reduce carbon dioxide emissions. The power required by vehicles may be supplied by fuel cells, which are more efficient than internal combustion engines.

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“…[111] By doping with 15 wt% MWCNTs-TiO 2 , compacted 2LiBH 4 -MgH 2 delivered gravimetric and volumetric hydrogen storage capacities of 6.8 wt% and 68 g H 2 L À1 , respectively. [112] Co-and Ni-based catalysts improved hydrogen cycling performance of binary LiBH 4 -Mg(BH 4 ) 2 and LiBH 4 -LiNH 2 systems, respectively. [113] Although hydrogen desorption temperatures were largely lowered with the presence of catalytic additives (Table 4), the reversibility of hydrogen storage in these binary systems has not been improved effectively, which is critical for practical applications.…”

Section: Catalyst Doping Into Reactive Compositesmentioning

confidence: 99%

“…[115] The activation energy of the decomposition of LiBH 4 and MgH 2 was decreased by 27 and 132 kJ mol À1 H 2 , respectively, due to nanoconfinement, and the calculated enthalpy changes were in the range of 46.21 kJ mol À1 H 2 . [116] By premilling MgH 2 , Gosalawit-Utke et al obtained a MWCNT decorated with TiO 2 15 wt% 6.8 355 [112] dehydrogenation rate approximately twice faster for the nanoconfined sample than that of the sample without MgH 2 premilling. [117] With a self-assembly followed by solution infiltration, Xia et al fabricated a graphene-supported monodispersed 2LiBH 4 -MgH 2 nanocomposite with a particle size of % 10.5 nm.…”

Section: Catalyst Doping Into Reactive Compositesmentioning

confidence: 99%

Recent Development of Lithium Borohydride‐Based Materials for Hydrogen Storage

Zhang

Huang

et al. 2021

Adv Energy and Sustain Res

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Lithium borohydride (LiBH4) has been attracting extensive attention as an exemplary high‐capacity complex hydride for solid‐state hydrogen storage applications because of its high hydrogen capacities (18.5 wt% and 121 kg H2 m−3). However, the strong and highly directional covalent and ionic bonds within LiBH4 structure induce high desorption temperatures, slow kinetics, and poor reversibility, which make large‐scale application impractical. To improve its hydrogen cycling performance, several strategies including cation/anion substitution, catalyst doping, reactive compositing, and nanoengineering, have been developed to tailor the thermodynamics and kinetics of hydrogen storage process. For example, largely reduced operation temperatures and remarkably improved hydrogen storage reversibility under moderate conditions have been achieved by the synergistic effect of nanostructuring and nanocatalysis. Herein, the state‐of‐the‐art development of LiBH4‐based hydrogen storage materials is summarized, including the basic physical and chemical properties, the principles of thermodynamic and kinetic manipulation and the strategies to improve hydrogen storage properties. The remaining challenges and the main directions of future research are also discussed.

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Compaction of LiBH4-MgH2 doped with MWCNTs-TiO2 for reversible hydrogen storage

Cited by 34 publications

References 41 publications

Complex Hydrides for Energy Storage, Conversion, and Utilization

Complex Hydrides for Energy Storage, Conversion, and Utilization

Hydrogen supply chain: Current status and prospects

Recent Development of Lithium Borohydride‐Based Materials for Hydrogen Storage

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