Dehydrogenation behavior and mechanism of LiAlH4 adding nano-CeO2 with different morphologies

Zhang, Chunmin; Liang, Long; Zhao, Shaolei; Wu, Zhijian; Wang, Shaohua; Yin, Dongming; Wang, Qingshuang; Wang, Limin; Wang, Chunli; Cheng, Yong

doi:10.1007/s12274-023-5636-8

Cited by 23 publications

(3 citation statements)

References 76 publications

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“…[3,4] For hydrogen storage material, different kinds of alloys including rare earth-based, Ti-based, Zr-based, Mg-based and V-based solid solution alloys, have been extensively investigated for electrochemical hydrogen storage and alkaline secondary batteries. [5][6][7][8][9] Recently, Co-based alloy becomes the hot spot and shows great development prospects due to its high theoretical capacity. The Co-containing materials (such as CoÀ B, CoÀ C, CoÀ Cu-Si, CoÀ P, CoÀ S, etc.)…”

Section: Introductionmentioning

confidence: 99%

Preparation of CO₂‐activated Porous Graphene for Enhancing the Electrochemical Hydrogen Storage Properties of Co₉S₈ Material

Jia,

Li,

Wang

et al. 2023

ChemistrySelect

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In this work, Co9S8 hydrogen storage material was synthesized by mechanical alloying. To improve the electrocatalytic activity and conductivity of Co9S8, a series of porous reduced graphene oxide (PRGO) materials were fabricated via a facile CO2 activation treatment of RGO at different processing times. The composites of Co9S8 doping with different amount of PRGO were manufactured through ball milling. During the electrochemical hydrogen storage test, the porous Co9S8+PRGO exhibited higher discharge capacity than Co9S8+NRGO and conventional Co9S8. Moreover, the CO2 activation time and additive amount of PRGO had significant impact on the electrochemical properties of Co9S8. Ultimately, the electrode of 6 wt.% PRGO‐2 modified Co9S8 attained the optimum discharge capacity of 653 mAh/g. The special porous structure and high specific surface area of porous graphene could provide more electrochemical active sites and facilitate the hydrogen diffusion. After PRGO modification, the cycling stability, high‐rate dischargeability (HRD) and kinetic properties of Co9S8 were also enhanced. It can be concluded that porous graphene possesses better effect than conventional graphene in improving the performance of hydrogen storage alloy.

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Section: Introductionmentioning

confidence: 99%

Preparation of CO₂‐activated Porous Graphene for Enhancing the Electrochemical Hydrogen Storage Properties of Co₉S₈ Material

Jia,

Li,

Wang

et al. 2023

ChemistrySelect

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“…However, efficient storage of hydrogen presents challenges due to its low density and high reactivity . Various storage techniques have been proposed, including physical (compressed gas and liquid hydrogen) and chemical (material-based) methods. , While physical storage provides high gravimetric capacity, it often incurs energy penalties from compression or liquefaction. Alternatively, chemical storage like metal hydrides, , nanomaterials, , graphene materials, , and organic compounds , are being developed.…”

Section: Introductionmentioning

confidence: 99%

Development of V-Free BCC Structured Alloys for Hydrogen Storage

Hu,

Tang,

Xiao

et al. 2023

ACS Appl. Energy Mater.

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V-free body-centered cubic (BCC) structured hydrogen storage alloys have gained significant attention for their low cost and high theoretical hydrogen storage capacity (3.8 wt %). However, before practical application, critical challenges, such as low dehydriding capacity, activation difficulty, and poor cyclic stability, need to be solved. In this work, an easily activated and high-performance V-free BCC-type alloy (Ti40Cr50Mo10Ce1) was successfully synthesized by heat treatment and Ce doping. The heat treatment significantly increased its dehydriding capacity to 2.5 wt %, attributed to a reduced slope factor (0.76–0.17), making it comparable to V-based BCC-type alloys. And the V-free BCC-type alloy, after Ce doping, enabled room-temperature hydrogen absorption, eliminating the need for high-temperature activation. Ce doping did not significantly affect the activation energy, enthalpy change, or hysteresis factor of the alloy during de/hydrogenation. Additionally, the V-free BCC-type alloy, after heat treatment and Ce doping, exhibited excellent cyclic stability, with a capacity retention rate of 90% after 100 cycles. This study provides valuable guidance for designing innovative and cost-effective hydrogen storage alloys.

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“…Confinement inside a porous scaffold, addition of catalysts, and mixing with other complex metal hydrides have been used for this effect to decrease the temperature of H 2 release, improve the kinetics, and improve cyclability through hydrogenation at lower H 2 pressure and temperature conditions by weakening the Al-H bond [10,[12][13][14][15][16][17][18][19][20][21]. For example, the addition of nano-sized TiH 2 [17] and nano-sized TiC [18] decreased the onset temperature of H 2 release down to 350 K, and the majority of H 2 from decomposition steps R1 and R2 was released during 15 min at 393 K. A part in the catalytic effect was attributed to the weakening of the Al-H bonds, where the Al-H band in infrared spectroscopy shifted to higher frequencies when TiC doping was applied [18].…”

Section: Introductionmentioning

confidence: 99%

Confinement of LiAlH4 in a Mesoporous Carbon Black for Improved Near-Ambient Release of H2

Ramah,

Palm,

Tuul

et al. 2023

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LiAlH4 is a potential solid-state H2 storage material, where safe and efficient H2 storage is of critical importance for the transition towards a sustainable emission-free economy. To improve the H2 release and storage properties of LiAlH4, confinement in porous media decreases the temperature of H2 release and improves the kinetics, where considerably improved H2 release properties are accompanied by a loss in the total amount of H2 released. The capability of mesoporous carbon black to improve the H2 storage properties of confined LiAlH4 is investigated with temperature-programmed desorption and time-stability measurements using X-ray diffraction and N2 gas adsorption measurements to characterize the composite materials’ composition and structure. Here, we present the capability of commercial carbon black to effectively lower the onset temperature of H2 release to that of near-ambient, ≥295 K. In addition, the confinement in mesoporous carbon black destabilized LiAlH4 to a degree that during ≤14 days in storage, under Ar atmosphere and at ambient temperature, 40% of the theoretically contained H2 was lost due to decomposition. Thus, we present the possibility of destabilizing LiAlH4 to a very high degree and, thus, avoiding the melting step before H2 release at around 440 K using scaffold materials with fine-tuned porosities.

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Dehydrogenation behavior and mechanism of LiAlH4 adding nano-CeO2 with different morphologies

Cited by 23 publications

References 76 publications

Preparation of CO₂‐activated Porous Graphene for Enhancing the Electrochemical Hydrogen Storage Properties of Co₉S₈ Material

Preparation of CO₂‐activated Porous Graphene for Enhancing the Electrochemical Hydrogen Storage Properties of Co₉S₈ Material

Development of V-Free BCC Structured Alloys for Hydrogen Storage

Confinement of LiAlH4 in a Mesoporous Carbon Black for Improved Near-Ambient Release of H2

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Dehydrogenation behavior and mechanism of LiAlH4 adding nano-CeO2 with different morphologies

Cited by 23 publications

References 76 publications

Preparation of CO2‐activated Porous Graphene for Enhancing the Electrochemical Hydrogen Storage Properties of Co9S8 Material

Preparation of CO2‐activated Porous Graphene for Enhancing the Electrochemical Hydrogen Storage Properties of Co9S8 Material

Development of V-Free BCC Structured Alloys for Hydrogen Storage

Confinement of LiAlH4 in a Mesoporous Carbon Black for Improved Near-Ambient Release of H2

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Product

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Preparation of CO₂‐activated Porous Graphene for Enhancing the Electrochemical Hydrogen Storage Properties of Co₉S₈ Material

Preparation of CO₂‐activated Porous Graphene for Enhancing the Electrochemical Hydrogen Storage Properties of Co₉S₈ Material