Improved hydrogen storage properties of combined Ca(BH4)2 and LiBH4 system motivated by addition of LaMg3 assisted with ball milling in H2

Gu, Jian; Gao, Mingxia; Wen, Linjiao; Huang, Jingjun; Liu, Yongfeng; Pan, Hongge

doi:10.1016/j.ijhydene.2015.07.089

Cited by 9 publications

(7 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By analyzing the diffraction ring diameter, the crystal structure is assumed to be CaB 6 . The amorphous structure of B is not good for the reverse reaction to produce LiBH 4 , while the crystal structure of CaB 6 is in favor of the reverse reaction293132. This explains why TiCl 3 plays a more effective role in raising the cycling stability performance of LiBH 4 -CaH 2 composite than NbF 5 .…”

Section: Resultsmentioning

confidence: 99%

Investigation on LiBH4-CaH2 composite and its potential for thermal energy storage

2017

Sci Rep

View full text Add to dashboard Cite

The LiBH4/CaH2 composite are firstly studied as Concentrating Solar Power Thermal Storage Material. The LiBH4/CaH2 composite according to the stoichiometric ratio are synthesized by high-energy ball milling method. The kinetics, thermodynamics and cycling stability of LiBH4/CaH2 composite are investigated by XRD (X-ray diffraction), DSC (Differential scanning calorimeter) and TEM (Transmission electron microscope). The reaction enthalpy of LiBH4/CaH2 composite is almost 60 kJ/mol H2 and equilibrium pressure is 0.482 MPa at 450 °C. The thermal storage density of LiBH4/CaH2 composite is 3504.6 kJ/kg. XRD results show that the main phase after dehydrogenation is LiH and CaB6. The existence of TiCl3 and NbF5 can effectively enhance the cycling perfomance of LiBH4/CaH2 composite, with 6–7 wt% hydrogen capacity after 10 cycles. The high thermal storage density, high working temperature and low equilibrium pressure make LiBH4/CaH2 composite a potential thermal storage material.

show abstract

Section: Resultsmentioning

confidence: 99%

Investigation on LiBH4-CaH2 composite and its potential for thermal energy storage

2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Zhang et al verified that the incorporation of Pd destabilized MgH 2 through the formation of a Mg 6 Pd phase, thus lowering the onset dehydrogenation temperature by 150°C . Gu et al homogeneously embedded fine particles of low‐crystalline MgH 2 and amorphous La‐containing hydrides in a combined Ca(BH 4 ) 2 /LiBH 4 ‐based system . They highlighted that the low crystallinity of MgH 2 and the amorphous nature of the La‐containing hydrides, as well as the uniform distribution of the embedded particles, resulted in enhanced dehydrogenation thermodynamics.…”

Section: Design Strategies For Improving the Reaction Thermodynamics mentioning

confidence: 99%

“…122 Gu et al homogeneously embedded fine particles of low-crystalline MgH 2 and amorphous La-containing hydrides in a combined Ca(BH 4 ) 2 /LiBH 4 -based system. 123 They highlighted that the low crystallinity of MgH 2 and the amorphous nature of the La-containing hydrides, as well as the uniform distribution of the embedded particles, resulted in enhanced dehydrogenation thermodynamics. However, it is not possible to experimentally test the hydrogenation/ dehydrogenation reaction thermodynamics for a large number of possible reactant material combinations in a timely manner and evaluate their potential as promising candidates for vehicular applications.…”

Section: Design Of Novel Reactions With Systematically Selected Combimentioning

confidence: 99%

A review on design strategies for metal hydrides with enhanced reaction thermodynamics for hydrogen storage applications

Kim

2017

Int J Energy Res

View full text Add to dashboard Cite

Summary Hydrogen is an alternative clean energy carrier that can replace current fossil fuels for vehicular applications. Thus, it is important to develop a method that would enable a high density of hydrogen to be stored safely under the operating conditions of polymer electrolyte membrane fuel cells. Even though metal hydrides are regarded as promising candidates that can safely store a high density of hydrogen, their stable nature makes it difficult for them to release hydrogen at mild temperatures in the range of 50 to 150°C. In this review, 3 primary strategies, namely, introduction of appropriate dopants, particle size control, and design of novel reactant mixtures based on high‐throughput screening methods, are briefly described with the aim of evaluating the potential of metal hydrides for hydrogen storage applications. The review suggests that successful development of promising hydrogen storage systems will depend on collaborative introduction of these 3 primary design strategies through the combined utilization of experimental and computational techniques to overcome the major challenges associated with the reaction thermodynamics of metal hydrides.

show abstract

“…Combining other hydrogen storage materials to form reactive systems is also effective in improving the hydrogen storage property of LiBH 4 , − such as the 2LiBH 4 –MgH 2 system reported first by Vajo et al In a previous report from our group, a combined system of LiBH 4 + Ca(BH 4 ) 2 modified by a hydrogenated LaMg 3 alloy leads to a low dehydrogenation temperature of ca. 200 °C, and the product postdehydrogenated at 350 °C for 30 min can absorb approximately 5.4 wt % H 2 upon heating to 450 °C under 90 bar of H 2 . However, the capacity retention is only 70% after 5 cycles.…”

Section: Introductionmentioning

confidence: 99%

“…200 °C, and the product postdehydrogenated at 350 °C for 30 min can absorb approximately 5.4 wt % H 2 upon heating to 450 °C under 90 bar of H 2 . 28 However, the capacity retention is only 70% after 5 cycles. A combination commonly changes the dehydrogenation pathways.…”

Section: Introductionmentioning

confidence: 99%

In Situ Introduction of Li₃BO₃ and NbH Leads to Superior Cyclic Stability and Kinetics of a LiBH₄-Based Hydrogen Storage System

Gao

et al. 2019

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

LiBH4 is a high-capacity hydrogen storage material; however, it suffers from high dehydrogenation temperature and poor reversibility. To tackle those issues, we introduce a new LiBH4-based system with in situ formed superfine and well-dispersed Li3BO3 and NbH as co-reactants. Those are synthesized by the addition of niobium ethoxide [Nb(OEt)5] to LiBH4, heat treatment of the mixture, and then hydrogenation, where Li3BO3 and NbH are generated from the reaction of Nb(OEt)5 and LiBH4. After optimization, the system with a normalized composition of LiBH4-0.04(Li3BO3 + NbH) in molar fraction shows superior hydrogen storage reversibility and kinetics. The initial and main dehydrogenation temperatures of the system are 200 and 90 °C lower than those of the pristine LiBH4, respectively, and 8.2 wt % H2 is released upon heating to 400 °C. A capacity of 7.2 wt % H2, corresponding to a capacity retention of 91%, is sustained after 30 cycles in an isothermal cyclic regime of dwelling at 400 °C for 60 min for dehydrogenation and dwelling at 500 °C and 50 bar H2 pressure for 20 min for hydrogenation. Such a high cyclic stability for a LiBH4-based system has never been reported to date. The in situ introduced Li3BO3 and NbH have a synergistic catalysis effect on the improvement of the hydrogen storage performance of LiBH4, showing highly effective bidirectional action on both dehydrogenation and hydrogenation.

show abstract

Improved hydrogen storage properties of combined Ca(BH4)2 and LiBH4 system motivated by addition of LaMg3 assisted with ball milling in H2

Cited by 9 publications

References 42 publications

Investigation on LiBH4-CaH2 composite and its potential for thermal energy storage

Investigation on LiBH4-CaH2 composite and its potential for thermal energy storage

A review on design strategies for metal hydrides with enhanced reaction thermodynamics for hydrogen storage applications

In Situ Introduction of Li₃BO₃ and NbH Leads to Superior Cyclic Stability and Kinetics of a LiBH₄-Based Hydrogen Storage System

Contact Info

Product

Resources

About

Improved hydrogen storage properties of combined Ca(BH4)2 and LiBH4 system motivated by addition of LaMg3 assisted with ball milling in H2

Cited by 9 publications

References 42 publications

Investigation on LiBH4-CaH2 composite and its potential for thermal energy storage

Investigation on LiBH4-CaH2 composite and its potential for thermal energy storage

A review on design strategies for metal hydrides with enhanced reaction thermodynamics for hydrogen storage applications

In Situ Introduction of Li3BO3 and NbH Leads to Superior Cyclic Stability and Kinetics of a LiBH4-Based Hydrogen Storage System

Contact Info

Product

Resources

About

In Situ Introduction of Li₃BO₃ and NbH Leads to Superior Cyclic Stability and Kinetics of a LiBH₄-Based Hydrogen Storage System