Eutectic melting in x(2LiBH4-MgH2) hydrogen storage system by the addition of KH

Pal, Pratibha; Jain, Ankur; Miyaoka, Hiroki; Kojima, Yoshiyuki; Ichikawa, Takayuki

doi:10.1016/j.ijhydene.2019.04.095

Cited by 5 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where E a = activation energy, k= rate constant, A= frequency factor, R = gas constant (8.3145 J mol −1 K −1 ), T = temperature, β = heating rate and T p = peak temperature. The issue of kinetics in hydrogen storage materials has been investigated for a long time by continuous inventions of different techniques such as (nanosizing) ball milling and nanoconfinement, use of catalyst and thin films [24][25][26][27]. The problem of kinetics occurs because of the complexity of these hydride materials.…”

Section: Basic Understanding Of Kinetics and A Light On The Kinetics Of Metal Hydridementioning

confidence: 99%

“…In summary, it can be understood that improving the hydrogen de/absorption kinetics means reducing the activation barrier involved with the rate-limiting steps. There are many techniques and methods to improve kinetics reported by different groups such as nanoscaling, nanoconfinement, use of catalyst, doping and alloying [24][25][26][27]64]. However, in our perspective, alloying is basically a way to alter the thermodynamics of the system and does not affect the kinetics directly.…”

Section: Mechanism Of Hydrogen Absorption/desorption and Need Of Catalystmentioning

confidence: 99%

“…It is well known that many different materials, alloys, complex hydrides and composites have been used for the purpose of hydrogen storage [11,15,24,26,[67][68][69][70][71][72]. Even if surface oxidation can be fixed by sample activation and other related methods, it takes a long time to desorb/absorb hydrogen by hydride materials and hence this makes it almost impossible for practical usage.…”

Section: D-block (Transition Metal) Elements As Catalystmentioning

confidence: 99%

See 2 more Smart Citations

The Catalytic Role of D-block Elements and Their Compounds for Improving Sorption Kinetics of Hydride Materials: A Review

et al. 2021

Self Cite

View full text Add to dashboard Cite

The goal of finding efficient and safe hydrogen storage material motivated researchers to develop several materials to fulfil the demand of the U.S. Department of Energy (DOE). In the past few years, several metal hydrides, complex hydrides such as borohydrides and alanates, have been researched and found efficient due to their high gravimetric and volumetric density. However, the development of these materials is still limited by their high thermodynamic stability and sluggish kinetics. One of the methods to improve the kinetics is to use catalysts. Among the known catalysts for this purpose, transition metals and their compounds are known as the leading contender. The present article reviews the d-block transition metals including Ni, Co, V, Ti, Fe and Nb as catalysts to boost up the kinetics of several hydride systems. Various binary and ternary metal oxides, halides and their combinations, porous structured hybrid designs and metal-based Mxenes have been discussed as catalysts to enhance the de/rehydrogenation kinetics and cycling performance of hydrogen storage systems.

show abstract

Section: Basic Understanding Of Kinetics and A Light On The Kinetics Of Metal Hydridementioning

confidence: 99%

Section: Mechanism Of Hydrogen Absorption/desorption and Need Of Catalystmentioning

confidence: 99%

Section: D-block (Transition Metal) Elements As Catalystmentioning

confidence: 99%

See 1 more Smart Citation

The Catalytic Role of D-block Elements and Their Compounds for Improving Sorption Kinetics of Hydride Materials: A Review

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…[12][13][14][15][16] Among them, KH have attracted attention in M-N-H, M-B-H, and M-O-H systems. 15,16 It is reported that LiH-LiNH 2 system desorbs hydrogen in lower temperature with addition of KH. 10 In this system, KH reacts with NH 3 to form KNH 2 .…”

Section: Catalytic Effect Of Kh In Complex Hydridesmentioning

confidence: 99%

Dehydrogenation properties of hydride‐hydroxide systems containing potassium

Noto

Isobe

Hashimoto

2021

Intl J of Energy Research

View full text Add to dashboard Cite

In this research, dehydrogenation properties of several hydride-hydroxide systems containing KH and KOH have been evaluated. Six types of hydridehydroxide systems (KH-M[OH] n , MH m -KOH, M: Li, Na, Mg) were prepared by ball milling method. We expected reaction formula of these six systems with assumption, that is, oxides would form after dehydrogenation. The hydrogen desorption properties of these systems were evaluated by TG-DTA and MS. From the results of XRD before and after dehydrogenation, we obtained actual reaction formulas, which were different from expected formulas.Among six systems, it was confirmed that only KH-LiOH system dehydrogenated in endothermic. This means that KH-LiOH system can reversibly ab/desorb hydrogen in principle. However, it is calculated that extremely high pressure of GPa order is required for rehydrogenation of KH-LiOH system.

show abstract

“…Nevertheless, with slow dehydrogenation kinetics, MgH 2 that releases hydrogen over 400°C has been a big concern as a convincing storage material for hydrogen in solid‐state 6,7 . Owing to the issue, many techniques have been introduced to ameliorate the potency of this hydride, such as the use of ball milling, 8‐12 catalyst incorporation, 13‐21 tuning of the thermodynamics, and kinetics using plasma milling 22,23 and in utilizing the principle of reactive composite hydride (RHC) 24‐28 . The RHC principle is quite a different method, in which at least two hydrides are combined and reacts exothermally in order to produce a new intermediate that can promote the hydrogen storage performances.…”

Section: Introductionmentioning

confidence: 99%

Enhanced the hydrogen storage properties and reaction mechanisms of 4MgH ₂ + LiAlH ₄ composite system by addition with TiO ₂

Mustafa

Yahya

Sulaiman

et al. 2021

Intl J of Energy Research

View full text Add to dashboard Cite

Summary A ball milling technique was used to prepare a 4MgH2‐LiAlH4 doped TiO2 sample. The hydrogen storage behaviour of the system 4MgH2‐LiAlH4‐TiO2 and the role played by TiO2 have been systematically investigated. The result shows the decrement of the initial decomposition temperature from the 4MgH2‐LiAlH4‐TiO2 composite when contrasted with the 4MgH2‐LiAlH4 system. The initial dehydrogenation temperature of 4MgH2‐LiAlH4‐10 wt% TiO2 destabilized system decreased from 100°C and 270°C of undoped composite to 70°C and 200°C, respectively, for the desorption process in the first two stages. It was also found that the re/dehydrogenation kinetics performances of the 4MgH2‐LiAlH4‐10 wt% TiO2 destabilized system was improved when contrasted with the non‐catalyzed sample. On the other hand, the activation energy for the MgH2‐relevant decomposition is reduced from 133.3 kJ/mol (4MgH2‐LiAlH4 sample) to 102.5 kJ/mol (4MgH2‐LiAlH4‐TiO2 sample). In addition, this synergistic effect of TiO2 on the improvement of the absorption/desorption performances was related to the formation of Al3Ti and TiH2 phases in the doped sample upon desorption, which reinforces the interaction of MgH2 with LiAlH4. This further changes the thermodynamics of the reactions by modifying the absorption/desorption pathway. In conclusion, the TiO2 catalyst showed a good catalytic impact in ameliorating the hydrogen sorption behaviour of the 4MgH2‐LiAlH4 sample.

show abstract

Eutectic melting in x(2LiBH4-MgH2) hydrogen storage system by the addition of KH

Cited by 5 publications

References 21 publications

The Catalytic Role of D-block Elements and Their Compounds for Improving Sorption Kinetics of Hydride Materials: A Review

The Catalytic Role of D-block Elements and Their Compounds for Improving Sorption Kinetics of Hydride Materials: A Review

Dehydrogenation properties of hydride‐hydroxide systems containing potassium

Enhanced the hydrogen storage properties and reaction mechanisms of 4MgH ₂ + LiAlH ₄ composite system by addition with TiO ₂

Contact Info

Product

Resources

About

Eutectic melting in x(2LiBH4-MgH2) hydrogen storage system by the addition of KH

Cited by 5 publications

References 21 publications

The Catalytic Role of D-block Elements and Their Compounds for Improving Sorption Kinetics of Hydride Materials: A Review

The Catalytic Role of D-block Elements and Their Compounds for Improving Sorption Kinetics of Hydride Materials: A Review

Dehydrogenation properties of hydride‐hydroxide systems containing potassium

Enhanced the hydrogen storage properties and reaction mechanisms of 4MgH 2 + LiAlH 4 composite system by addition with TiO 2

Contact Info

Product

Resources

About

Enhanced the hydrogen storage properties and reaction mechanisms of 4MgH ₂ + LiAlH ₄ composite system by addition with TiO ₂