Enhanced hydrogen storage properties of the 2LiBH4–MgH2composite with BaTiO3as an additive

Wang, Jiasheng; Han, Shumin; Wang, Zhibin; Ke, Dandan; Liu, Jingjing; Ma, Mingzhen

doi:10.1039/c6dt00045b

Cited by 10 publications

(3 citation statements)

References 37 publications

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“…Research efforts have been focused on developing and verifying onboard automotive hydrogen storage materials to meet these targets. Many kinds of complex materials have been synthesized and studied for storing a high capacity of hydrogen, such as amide/imide systems like LiNH 2 /Li 2 NH, − complex metal hydrides like LiAlH 4 − and NaAlH 4 , − and borohydrides like LiBH 4 , − NaBH 4 , − and Mg(BH 4 ) 2 . − However, these materials require improvements of the properties for development as practical materials. For instance, the amide/imide systems form byproduct gas during dehydrogenation, complex metal hydrides are not easily reversible, and borohydrides have sluggish kinetics.…”

Section: Introductionmentioning

confidence: 99%

Review on Ammonia Absorption Materials: Metal Hydrides, Halides, and Borohydrides

Zhang

Miyaoka

Ichikawa

et al. 2018

ACS Appl. Energy Mater.

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Ammonia is well-known as a hydrogen carrier owing to its high hydrogen capacity (17.8 wt %). However, the toxicity and the high storage pressure limit the application of ammonia. Consequently, storing ammonia in solid state has become the promising method to utilize ammonia for practical applications. In this review, ammonia absorption properties of metal hydrides, halides, and borohydrides to form metal amides and metal ammine complexes with various coordination numbers have been systematically summarized. Through this research, we found the correlation between the reactivity with ammonia and the Pauling electronegativity of neutral atoms according to different systems. Metal hydrides with small electronegativity value of the neutral atom of the cations can react with ammonia to form metal amides, which can be used as hydrogen storage material. For metal halides or borohydrides, the lower plateau pressure of ammonia absorption can be obtained in the material with larger electronegativity value of the neutral atom of cations. This useful tendency can be used in the materials design for the potential applications of ammonia-fed fuel cells.

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Section: Introductionmentioning

confidence: 99%

Review on Ammonia Absorption Materials: Metal Hydrides, Halides, and Borohydrides

Zhang

Miyaoka

Ichikawa

et al. 2018

ACS Appl. Energy Mater.

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“…[104] With BaTiO 3 as an additive, the onset dehydrogenation temperature was decreased by 124 ºC. [105] Upon dehydrogenation, BaTiO 3 reacted with LiBH 4 forming BaB 6 and TiO 2 . BaB 6 is beneficial to lower the stability of LiBH 4 , whereas TiO 2 has a catalytic effect in improving the kinetics of hydrogenation/dehydrogenation.…”

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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“…One of the most effective strategies to improve the hydrogen storage performance of 2LiBH 4 -MgH 2 composite is the introduction of metal-based catalysts, including metal halides, metal oxides, and metal sulfides. − Induced by the high reactivity of MgH 2 and LiBH 4 , these metal-based catalysts would be transformed to stable metallic borides in general, which are able to reduce the operating temperature and simultaneously promote the kinetics of hydrogen desorption and adsorption process of 2LiBH 4 -MgH 2 composite. − For instance, it has been demonstrated that the formation of CoB from the interaction between Co and LiBH 4 plays a catalytic role in improving the H 2 desorption and adsorption of 2LiBH 4 -MgH 2 and promoting the formation of MgB 2 , which results in the reduction of incubation period down to only 4 h . Interestingly, during the dehydrogenation process of Ni-catalyzed 2LiBH 4 -MgH 2 composite, the formation of MgNi 3 B 2 is identified as the heterogeneous nucleation sites for the formation of MgB 2 , which could also facilitate the dehydrogenation kinetics of 2LiBH 4 -MgH 2 composite .…”

Section: Introductionmentioning

confidence: 99%

Reversible Hydrogen Storage Performance of 2LiBH₄-MgH₂ Enabled by Dual Metal Borides

Chen

Sun

et al. 2022

ACS Appl. Energy Mater.

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2LiBH4-MgH2 is a typical reactive hydride composite with a capacity of 11.5 wt % that has attracted intensive attention. Its practical application, however, is hindered by sluggish kinetics, poor reversibility, and different reaction pathways under various temperatures and hydrogen back pressures. Herein, bimetallic (NiCo) sheet-like nanoporous carbon (NiCo@NC) is designed to improve the hydrogen storage performance of 2LiBH4-MgH2 composite. During the initial H2 desorption process of 2LiBH4-MgH2 under 4 atm H2 pressure, NiCo NPs in NiCo@NC would be in situ transformed into MgNi3B2, acting as the heterogeneous nucleation sites for MgB2, and CoB, serving as the effective catalyst for H2 desorption of 2LiBH4-MgH2 composite. Due to the synergistic effect of in situ formed CoB and MgNi3B2, the incubation period for 2LiBH4-MgH2 is reduced to 1.5 h in the initial H2 desorption process and almost vanished in the following H2 desorption and adsorption cycles, while the incubation time for bulk 2LiBH4-MgH2 composite reaches 16 h. More importantly, induced by the catalysis of NiCo@NC, 2LiBH4-MgH2 exhibits improved cycling stability with a reversible capacity of 8.4 wt % after 10 cycles of hydrogen storage process, corresponding to 95.5% of H2 desorption capacity of the second cycle. This work provides a potential strategy for the design of dual-functional catalysts to improve reversible hydrogen storage performance of reactive hydride composites.

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Enhanced hydrogen storage properties of the 2LiBH₄–MgH₂composite with BaTiO₃as an additive

Cited by 10 publications

References 37 publications

Review on Ammonia Absorption Materials: Metal Hydrides, Halides, and Borohydrides

Review on Ammonia Absorption Materials: Metal Hydrides, Halides, and Borohydrides

Recent Development of Lithium Borohydride‐Based Materials for Hydrogen Storage

Reversible Hydrogen Storage Performance of 2LiBH₄-MgH₂ Enabled by Dual Metal Borides

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Enhanced hydrogen storage properties of the 2LiBH4–MgH2composite with BaTiO3as an additive

Cited by 10 publications

References 37 publications

Review on Ammonia Absorption Materials: Metal Hydrides, Halides, and Borohydrides

Review on Ammonia Absorption Materials: Metal Hydrides, Halides, and Borohydrides

Recent Development of Lithium Borohydride‐Based Materials for Hydrogen Storage

Reversible Hydrogen Storage Performance of 2LiBH4-MgH2 Enabled by Dual Metal Borides

Contact Info

Product

Resources

About

Enhanced hydrogen storage properties of the 2LiBH₄–MgH₂composite with BaTiO₃as an additive

Reversible Hydrogen Storage Performance of 2LiBH₄-MgH₂ Enabled by Dual Metal Borides