Monodisperse Magnesium Hydride Nanoparticles Uniformly Self‐Assembled on Graphene

Xia, Guanglin; Tan, Yingbin; Chen, Xiaowei; Sun, Dalin; Guo, Zaiping; Liu, Huan; Ouyang, Liuzhang; Zhu, Min; Yu, Xuebin

doi:10.1002/adma.201502005

Cited by 326 publications

(151 citation statements)

References 40 publications

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“…The growth of homogeneous MgH 2 NPs anchored in situ on graphene was obtained by a hydrogenation induced solvothermal reaction of dibutyl magnesium at 200 o C for 24 h. [24] Field-emission scanning electron microscope (FE-SEM) ( After infiltration and nucleation of LiBH4, the morphology of MgH2@G is essentially preserved, and the structure of MgH2 remains spherical. Taking advantage of MgH2 NPs with a relatively high surface energy as heterogeneous sites, which exhibits favorable adsorption of tetrahydrofuran (THF) containing LiBH4 [25] , and the hydrophobic nature of graphene, which is incompatible with THF [26,27] [ 31,32] Interestingly, the enthalpy changes of dehydrogenation of 2LiBH4-MgH2 nanocomposite are calculated to be ~46.8 kJ mol -1 H2, which is significantly lower than the relative value of the bulk counterpart attributed to the favorable formation of In the light of these observations, the superior hydrogen storage performance and cycling stability of graphene-supported 2LiBH4-MgH2 nanocomposite can be mainly ascribed to several unique features.…”

Section: Resultsmentioning

confidence: 99%

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Graphene-wrapped reversible reaction for advanced hydrogen storage

Xia

Tan

et al. 2016

Nano Energy

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X. (2016). Graphene-wrapped reversible reaction for advanced hydrogen storage. Nano Energy, 26 488-495. Graphene-wrapped reversible reaction for advanced hydrogen storage AbstractHere, we report the fabrication of a graphene-wrapped nanostructured reactive hydride composite, i.e., 2LiBH4-MgH2, made by adopting graphene-supported MgH2 nanoparticles (NPs) as the nanoreactor and heterogeneous nucleation sites. The porous structure, uniform distribution of MgH2 NPs, and the steric confinement by flexible graphene induced a homogeneous distribution of 2LiBH4-MgH2 nanocomposite on graphene with extremely high loading capacity (80 wt%) and energy density. The well-defined structural features, including even distribution, uniform particle size, excellent thermal stability, and robust architecture endow this composite with significant improvements in its hydrogen storage performance. For instance, at a temperature as low as 350 °C, a reversible storage capacity of up to 8.9 wt% H2, without degradation after 25 complete cycles, was achieved for the 2LiBH4-MgH2 anchored on graphene. The design of this threedimensional architecture can offer a new concept for obtaining high performance materials in the energy storage field. AbstractHere, we report the fabrication of a graphene-wrapped nanostructured reactive hydride composite, i.e., 2LiBH4-MgH2, made by adopting graphene-supported MgH2 nanoparticles (NPs) as the nanoreactor and heterogeneous nucleation sites. The porous structure, uniform distribution of MgH2 NPs, and the steric confinement by flexible graphene induced a homogeneous distribution of 2LiBH4-MgH2 nanocomposite on graphene with extremely high loading capacity (80 wt%) and energy density. The well-defined structural features, including even distribution, uniform particle size, excellent thermal stability, and robust architecture endow this composite with significant improvements in its hydrogen storage performance. For instance, at a temperature as low as 350 o C, a reversible storage capacity of up to 8.9wt.% H2, without degradation after 25 complete cycles, was achieved for the 2LiBH 4 -MgH 2 anchored on graphene. The design of this three-dimensional architecture can offer a new concept for obtaining high performance materials in the energy storage field.

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Section: Resultsmentioning

confidence: 99%

“…[24] In a typical synthesis of MH20@G, 0.0132 g graphene was first mixed with 1.6 mL MgBu 2 solution and 40 mL cyclohexane in a pressure reactor vessel to achieve a homogeneous dispersion. Pressure-composition-temperature (PCT) measurements were conducted at the desired temperatures, and the equilibrium time for each point was set to 600 s. …”

Section: Methodsmentioning

confidence: 99%

Graphene-wrapped reversible reaction for advanced hydrogen storage

Xia

Tan

et al. 2016

Nano Energy

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“…Secondly, hydrogen could diffuse more deeply into the particle due to the interconnected metallic Mg network, which ensured the fast hydrogenation kinetics. Yu et al [82] also developed a general strategy for facile preparation of monodispersed MgH 2 nanoparticles on graphene. Under the structure-directing role of graphene, the as-prepared sample showed high thermal conductivity and good hydrogen storage performance (5.7 wt % H 2 capacity for the 75 wt % MgH 2 loading percentage).…”

Section: Kinetics and Thermal Conductivity Propertiesmentioning

confidence: 99%

Mg-Based Hydrogen Absorbing Materials for Thermal Energy Storage—A Review

Li¹,

Li²,

Shao³

et al. 2018

Applied Sciences

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Utilization of renewable energy such as solar, wind, and geothermal power, appears to be the most promising solution for the development of sustainable energy systems without using fossil fuels. Energy storage, especially to store the energy from fluctuating power is quite vital for smoothing out energy demands with peak/off-peak hour fluctuations. Thermal energy is a potential candidate to serve as an energy reserve. However, currently the development of thermal energy storage (TES) by traditional physical means is restricted by the relatively low energy density, high temperature demand, and the great thermal energy loss during long-period storage. Chemical heat storage is one of the most promising alternatives for TES due to its high energy density, low energy loss, flexible temperature range, and excellent storage duration. A comprehensive review on the development of different types of Mg-based materials for chemical heat storage is presented here and the classic and state-of-the-art technologies are summarized. Some related chemical principles, as well as heat storage properties, are discussed in the context. Finally, some dominant factors of chemical heat storage materials are concluded and the perspective is proposed for the development of next-generation chemical heat storage technologies.

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“…Yu and co‐workers127 reported the synthesis of graphene‐supported ultrafine MgH 2 NPs with both homogeneous distribution and high loading percent by a hydrogenation‐induced solvothermal method. The proposed unique bottom‐up assembly strategy enabled strong coupling between graphene and MgH 2 NPs as well as the homogeneous distribution of nanoscale particles, resulting in admirable H 2 storage performance in graphene/MgH 2 composites.…”

Section: Self‐assembled Graphene‐based Hybrid Structuresmentioning

confidence: 99%

Self‐Assembled Graphene‐Based Architectures and Their Applications

Yuan

Xiao

et al. 2017

Advanced Science

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Due to unique planar structures and remarkable thermal, electronic, and mechanical properties, chemically modified graphenes (CMGs) such as graphene oxides, reduced graphene oxides, and the related derivatives are recognized as the attractive building blocks for “bottom‐up” nanotechnology, while self‐assembly of CMGs has emerged as one of the most promising approaches to construct advanced functional materials/systems based on graphene. By virtue of a variety of noncovalent forces like hydrogen bonding, van der Waals interaction, metal‐to‐ligand bonds, electrostatic attraction, hydrophobic–hydrophilic interactions, and π–π interactions, the CMGs bearing various functional groups are highly desirable for the assemblies with themselves and a variety of organic and/or inorganic species which can yield various hierarchical nanostructures and macroscopic composites endowed with unique structures, properties, and functions for widespread technological applications such as electronics, optoelectronics, electrocatalysis/photocatalysis, environment, and energy storage and conversion. In this review, significant recent advances concerning the self‐assembly of CMGs are summarized, and the broad applications of self‐assembled graphene‐based materials as well as some future opportunities and challenges in this vibrant area are elucidated.

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Monodisperse Magnesium Hydride Nanoparticles Uniformly Self‐Assembled on Graphene

Cited by 326 publications

References 40 publications

Graphene-wrapped reversible reaction for advanced hydrogen storage

Graphene-wrapped reversible reaction for advanced hydrogen storage

Mg-Based Hydrogen Absorbing Materials for Thermal Energy Storage—A Review

Self‐Assembled Graphene‐Based Architectures and Their Applications

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