Oxygen‐free Layer‐by‐Layer Assembly of Lithiated Composites on Graphene for Advanced Hydrogen Storage

Xia, Guanglin; Tan, Yingbin; Chen, Xiaowei; Fang, Fang; Sun, Dalin; Li, Xingguo; Guo, Zaiping; Yu, Xuebin

doi:10.1002/advs.201600257

Cited by 30 publications

(24 citation statements)

References 39 publications

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“…We observed an improved wetting of the matrix when graphene was present, in accordance with the insertion of boron within graphene defects as presented by Mason [115]. The solvothermal reaction of organometallic compounds (MgBu 2 , LiBu) under high hydrogen pressure (35, 50 bar) allowed Xia et al to decorate graphene sheets with nanostructured hydrides [134,135]. 10 nm core-shell MgH 2 -LiBH 4 nanoparticles and 2 nm thick LiBH 4 layers were observed by TEM at the surface of the graphene support, even at very high weight loading (70-80%).…”

Section: Matrixsupporting

confidence: 78%

“…10 nm core-shell MgH 2 -LiBH 4 nanoparticles and 2 nm thick LiBH 4 layers were observed by TEM at the surface of the graphene support, even at very high weight loading (70-80%). This allowed both composites to exhibit excellent hydrogen capacity (9.1-12.8 wt.%), and the reactive hydride [134] displayed much-improved reversibility in front of the lone LiBH 4 [135]. These materials present well-defined peaks by XRD, suggesting the hydride might not be nanoconfined.…”

Section: Matrixmentioning

confidence: 99%

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Tuning LiBH4 for Hydrogen Storage: Destabilization, Additive, and Nanoconfinement Approaches

et al. 2019

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Hydrogen technology has become essential to fulfill our mobile and stationary energy needs in a global low–carbon energy system. The non-renewability of fossil fuels and the increasing environmental problems caused by our fossil fuel–running economy have led to our efforts towards the application of hydrogen as an energy vector. However, the development of volumetric and gravimetric efficient hydrogen storage media is still to be addressed. LiBH4 is one of the most interesting media to store hydrogen as a compound due to its large gravimetric (18.5 wt.%) and volumetric (121 kgH2/m3) hydrogen densities. In this review, we focus on some of the main explored approaches to tune the thermodynamics and kinetics of LiBH4: (I) LiBH4 + MgH2 destabilized system, (II) metal and metal hydride added LiBH4, (III) destabilization of LiBH4 by rare-earth metal hydrides, and (IV) the nanoconfinement of LiBH4 and destabilized LiBH4 hydride systems. Thorough discussions about the reaction pathways, destabilizing and catalytic effects of metals and metal hydrides, novel synthesis processes of rare earth destabilizing agents, and all the essential aspects of nanoconfinement are led.

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Section: Matrixsupporting

confidence: 78%

Section: Matrixmentioning

confidence: 99%

Tuning LiBH4 for Hydrogen Storage: Destabilization, Additive, and Nanoconfinement Approaches

et al. 2019

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“…Thus, thermal properties, as reported and discussed in the previous publication [16], become highly relevant for larger bed sizes. Another way to avoid long-range phase separation has been shown in the literature by the implementation of graphene-wrapped nanostructures [52][53][54].…”

Section: Reversible Hydrogen Capacitymentioning

confidence: 99%

Fundamental Material Properties of the 2LiBH4-MgH2 Reactive Hydride Composite for Hydrogen Storage: (II) Kinetic Properties

et al. 2018

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Reaction kinetic behaviour and cycling stability of the 2LiBH 4-MgH 2 reactive hydride composite (Li-RHC) are experimentally determined and analysed as a basis for the design and development of hydrogen storage tanks. In addition to the determination and discussion about the properties; different measurement methods are applied and compared. The activation energies for both hydrogenation and dehydrogenation are determined by the Kissinger method and via the fitting of solid-state reaction kinetic models to isothermal volumetric measurements. Furthermore, the hydrogen absorption-desorption cycling stability is assessed by titration measurements. Finally, the kinetic behaviour and the reversible hydrogen storage capacity of the Li-RHC are discussed.

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“…A drawback of this approach is the re-aggregation of the produced nanoparticles that increase, again, in size during sorption cycles, thus slowly going back to the initial bulk material condition. For this reason, the stabilization of the nanoscaled material can be achieved by encapsulating the hydrides in porous, e.g., carbon-based scaffolds, thus protecting the nanoparticles in the limited size of the pores [28][29][30]. The decomposition of pure LiBH 4 apart from H 2 produces diborane (B 2 H 6 ), a fraction of which can react with LiBH 4 , generating stable closoboranes [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Sorption and Reversibility of the LiBH4-KBH4 Eutectic System Confined in a CMK-3 Type Carbon via Melt Infiltration

Peru

Payandeh

Charalambopoulou

et al. 2020

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Metal borohydrides have very high hydrogen densities but their poor thermodynamic and kinetic properties hinder their use as solid hydrogen stores. An interesting approach to improve their functionality is nano-sizing by confinement in mesoporous materials. In this respect, we used the 0.725 LiBH4–0.275 KBH4 eutectic mixture, and by exploiting its very low melting temperature (378 K) it was possible to successfully melt infiltrate the borohydrides in a mesoporous CMK-3 type carbon (pore diameter ~5 nm). The obtained carbon–borohydride composite appears to partially alleviate the irreversibility of the dehydrogenation reaction when compared with the bulk LiBH4-KBH4, and shows a constant hydrogen uptake of 2.5 wt%–3 wt% for at least five absorption–desorption cycles. Moreover, pore infiltration resulted in a drastic decrease of the decomposition temperature (more than 100 K) compared to the bulk eutectic mixture. The increased reversibility and the improved kinetics may be a combined result of several phenomena such as the catalytic action of the carbon surface, the nano-sizing of the borohydride particles or the reduction of irreversible side-reactions.

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Oxygen‐free Layer‐by‐Layer Assembly of Lithiated Composites on Graphene for Advanced Hydrogen Storage

Cited by 30 publications

References 39 publications

Tuning LiBH4 for Hydrogen Storage: Destabilization, Additive, and Nanoconfinement Approaches

Tuning LiBH4 for Hydrogen Storage: Destabilization, Additive, and Nanoconfinement Approaches

Fundamental Material Properties of the 2LiBH4-MgH2 Reactive Hydride Composite for Hydrogen Storage: (II) Kinetic Properties

Hydrogen Sorption and Reversibility of the LiBH4-KBH4 Eutectic System Confined in a CMK-3 Type Carbon via Melt Infiltration

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