Li Hai-Wen

Li Hai-Wen
Hefei General Machinery Research Institute · Hydrogen Energy

PhD

About

187
Publications
50,243
Reads
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6,630
Citations
Citations since 2017
100 Research Items
4576 Citations
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201720182019202020212022202302004006008001,0001,200
201720182019202020212022202302004006008001,0001,200
201720182019202020212022202302004006008001,0001,200
Introduction
We mainly focus on the development of advanced materials and systems for hydrogen storage and energy storage.
Additional affiliations
October 2020 - present
Kyushu University
Position
  • Lecturer
October 2020 - February 2021
Hefei General Machinery Research Institute
Position
  • Professor
April 2011 - September 2020
Kyushu University
Position
  • Professor (Associate)

Publications

Publications (187)
Article
The size distributions of precipitated Ni clusters on the surface of a LaNi 5 -based alloy immersed in alkaline solution (alkaline treat-ment) at 383 K for 0–110 min were precisely determined by combining superparamagnetic analysis and transmission electron microscopy (TEM) observations. The superparamagnetic analysis indicated that the diameters o...
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Hydrogen may play a key role in a future sustainable energy system as a carrier of renewable energy to replace hydrocarbons. This review describes the fundamental physical and chemical properties of hydrogen and basic theories of hydrogen sorption reactions, followed by the emphasis on state-of-the-art of the hydrogen storage properties of selected...
Article
A study was conducted to demonstrate synthesis of a bimetallic dodecaborate LiNaB12H12 with significant superionic conductivity. LiNaB12H12 was prepared through sintering of LiBH4, NaBH4, and B110H14 with a stoichiometric molar ratio of 1:1:1. The successful synthesis was confirmed by X-ray diffraction, Raman spectra, and solid state nuclear magnet...
Article
Metal dodecaborate, widely regarded as an obstacle of the rehydrogenation of high-density hydrogen storage materials metal borohydrides M(BH4)n, is generally synthesized using liquid-phase process followed by a careful dehydration process. In this study, we propose a new and facile solvent-free synthesis process of dodecaborates using B10H14 with a...
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Magnesium and its alloys are the most investigated materials for solid-state hydrogen storage in the form of metal hydrides, but there are still unresolved problems with the kinetics and thermodynamics of hydrogenation and dehydrogenation of this group of materials. Severe plastic deformation (SPD) methods, such as equal-channel angular pressing (E...
Article
Metal dodecaborates (MxB12H12) are a versatile class of materials used in polymer chemistry and cancer treatment and are promising candidates as electrolytes for solid-state batteries. However, a general and scalable approach has not yet been developed for producing high-purity B12H122- derivatives. In this work, we report a simple, efficient, and...
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h i g h l i g h t s CALPHAD method indicated a high trend to the formation of C14 Laves phases for TiZrNbCrFeNi alloy. As cast TiZrNbCrFeNi alloy showed the presence of two C14 Laves phases. Under cycling, the fractions of two C14 Laves phases changes. TiZrNbCrFeNi alloy reversibly absorb and fully desorb 1.1 wt% of hydrogen at 473 K. Available onl...
Preprint
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[Published in Acta Materialia 236 (2022) 118117] Abstract: Despite high interest in compact and safe storage of hydrogen in the solid-state hydride form, the design of alloys that can reversibly and quickly store hydrogen at room temperature under pressures close to atmospheric pressure is a long-lasting challenge. In this study, first-principles c...
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[Published in Journal of Materials Science and Technology, Vol. 146, pp. 221-239, 2023] Abstract: Magnesium and its alloys are the most investigated materials for solid-state hydrogen storage in the form of metal hydrides, but there are still unresolved problems with the kinetics and thermodynamics of hydrogenation and dehydrogenation of this group...
Article
A highly complex crystal structure of stoichiometric Mg 5 (en) 6 (BH 4 ) 10 was solved from single crystal synchrotron X-ray diffraction and confirmed by neutron powder diffraction (NPD) on isotopically substituted Mg(en) 1.2 ( ¹¹ BD 4 ) 2 . We highlight the...
Article
Doping a catalyst can efficiently improve the hydrogen reaction kinetics of MgH2. However, the hydrogen desorption behaviors are complicated in different MgH2-catalyst systems. Here, a carbon-encapsulated nickel (Ni@C) core-shell catalyst is synthesized to improve the hydrogen storage properties of MgH2. The complicated hydrogen desorption mechanis...
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Despite high interest in compact and safe storage of hydrogen in the solid-state hydride form, the design of alloys that can reversibly and quickly store hydrogen at room temperature under pressures close to atmospheric pressure is a long-lasting challenge. In this study, first-principles calculations are combined with experiments to develop high-e...
Article
Hierarchically porous carbon foam (CF) and microporous nitrogen doped carbon foam (NCF) were synthesized at gram scale via the one-step thermal decomposition of metal alkoxides. The total hydrogen uptake of CF reached a maximum of 11.0 wt% at 77 K and 9.5 MPa (or 5.2 wt% excess at 3.9 MPa). This large uptake is attributed to large surface area (345...
Article
Lithium metal anode (LMA) has been regarded as the “Holy grail” among next-generation anode materials, which are severely enslaved to its poor cycling stability. Many problems such as Li dendrites and dead Li are involved in the cycling process, but a protection strategy with a single function is difficult to achieve long-term stability of LMA. Her...
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Hydrides based on magnesium and intermetallic compounds provide a viable solution to the challenge of energy storage from renewable sources, thanks to their ability to absorb and desorb hydrogen in a reversible way with a proper tuning of pressure and temperature conditions. Therefore, they are expected to play an important role in the clean energy...
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Transition metal compounds attract significant interest due to the promising application in energy storage devices. In this work, (Ni, Co)2(CO3)(OH)2 is prepared via a hydrothermal route. In this method, NH4F is utilized to tune the growth rate of hydroxycarbonates. The morphological and crystalline nature evolution process of hydroxycarbonates is...
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Intense literature and research efforts have focussed on the exploration of complex hydrides for energy storage applications over the past decades. A focus was dedicated to the determination of their thermodynamic and hydrogen storage properties, due to their high gravimetric and volumetric hydrogen storage capacities, but their application has bee...
Article
Development of advanced high‐voltage electrolytes is key to achieving high‐energy‐density lithium metal batteries (LMBs). Weakly‐solvating electrolytes (WSE) can produce unique anion‐driven interphasial chemistry via altering the solvating power of the solvent, but it's difficult to dissolve the majority of Li salts and fail to cycle at a cut‐off v...
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The development of efficient storage systems is one of the keys to the success of the energy transition. There are many ways to store energy, but among them, electrochemical storage is particularly valuable because it can store electrons produced by renewable energies with a very good efficiency. However, the solutions currently available on the ma...
Article
Water electrolysis is an efficient, clean and sustainable method for hydrogen production. However, high cost performance oxygen evolution reaction (OER) catalysts become the key to realize the industry-scale hydrogen production from water electrolysis. Herein, we for the first time report a polymetallic transition metal phosphide (Fe2P-NiCoP) catal...
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High-entropy alloys are potential candidates for various applications including hydrogen storage in the hydride form and energy storage in batteries. This study employs HEAs as new anode materials for nickel - metal hydride (Ni-MH) batteries. The TixZr2-xCrMnFeNi alloys with different Ti/Zr ratios, having the C14 Laves structure, are used. These al...
Article
Air stability of magnesium-based hydrogen storage materials is one of the key challenges for its large-scale application, as the hydrides could be oxidized easily during air exposure. In this work, TiH2 and graphite were added into magnesium nickel hydride (Mg2NiH4) by short-time (0.5 h) mechanical milling to clarify the effect of air exposure on h...
Article
In the electrochemical process, Pt nanoparticles (NPs) in Pt-based catalysts usually agglomerate due to Oswald ripening or lack of restraint, ultimately resulting in reduction of the active sites and catalytic efficiency. How to uniformly disperse and firmly fix Pt NPs on carbon matrix with suitable particle size for catalysis is still a big challe...
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Sodium alanate (NaAlH 4 ) with 5.6 wt% of hydrogen capacity suffers seriously from the sluggish kinetics for reversible hydrogen storage. Ti-based dopants such as TiCl 4 , TiCl 3 , TiF 3 , and TiO 2 are prominent in enhancing the dehydrogenation kinetics and hence reducing the operation temperature. The tradeoff, however, is a considerable decrease...
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Among the factors which restrict the large-scale utilization of magnesium-based hydride as a hydrogen storage medium, the high operating temperature, slow kinetics, and air stability in particular are key obstacles. In this work, a novel method, namely hydriding combustion synthesis plus short-term mechanical milling followed by air exposure, was p...
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High-pressure torsion (HPT) is widely used not only as a severe plastic deformation (SPD) method to produce ultrafine-grained metals but also as a mechanical alloying technique to synthesize different alloys. In recent years, there have been several attempts to synthesize functional high-entropy alloys using the HPT method. In this paper, the appli...
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Crystal structure and hydrogen storage properties of a novel equiatomic TiZrNbCrFe high-entropy alloy (HEA) were studied. The selected alloy, which had a A3B2-type configuration (A: elements forming hydride, B: elements with low chemical affinity with hydrogen) was designed to produce a hydride with a hydrogen-to-metal atomic ratio (H/M) higher tha...
Article
Hitherto, developing an economical and stable high-activity bifunctional Pt catalyst for oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) becomes necessary for fuel cells and regeneration fuel cell system. However, how to uniformly disperse and firmly fix Pt nanoparticles (NPs) on carbon support with optimal particle size for c...
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Lithium borohydride (LiBH4) has been attracting extensive attention as an exemplary high‐capacity complex hydride for solid‐state hydrogen storage applications because of its high hydrogen capacities (18.5 wt% and 121 kg H2 m−3). However, the strong and highly directional covalent and ionic bonds within LiBH4 structure induce high desorption temper...
Article
Reversible hydrogen absorption/desorption, the very fundamental property of metal hydrides (MHs), can be utilized to innovate the water splitting process. Spontaneous hydrogen absorption by a MH electrode shifts the water reduction potential to 0.3 V above the reversible hydrogen electrode. Then, the absorbed hydrogen can be released to give H2 by...
Article
The exploration of cheap and efficient electrodes for hydrogen evolution reactions (HER) is extremely challenging. Herein, we report a newly-designed V2O3@Ni hybrid grown in situ on nickel foam as an efficient HER catalyst. The nickel foam not only promoted the electron transfer rate as a supporting substrate, but also worked as the source of Ni to...
Article
Bismuth (Bi) has recently been discovered as a potential lithium-ion anode material for batteries with high Li capacity and suitable equilibrium potential, and without dendrite formation. However, the reversible electrochemical stability remains insufficient for applications. Herein, it is demonstrated that two-dimensional free-standing Bi nanoshee...
Article
Confinement of LiBH4 into porous materials is an efficient route to enhance their lithium ionic conductivity, which seems to be associated with types of scaffold and its mixture ratios. In...
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The hydrogen storage properties of the novel equiatomic TiZrNbFeNi and non-equiatomic Ti20Zr20Nb5Fe40Ni15 high entropy alloys (HEAs) were studied. These alloys were designed with the aid of thermodynamic calculations using the CALPHAD method due to their tendency to form single C14 Laves phase, a phase desirable for room-temperature hydrogen storag...
Article
To be able to mitigate the threat of climate change, we need an alternative to fossil fuels. The use of hydrogen in fuel cells is an ideal candidate because hydrogen can be produced in many different ways and has a high energy density. However, one challenge in using hydrogen as a fuel is its storage. Storing hydrogen as compressed gas typically re...
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Body‐centered cubic (BCC) and high‐entropy alloys are being investigated as potential hydrogen storage materials due to their ability to absorb high amounts of hydrogen at moderate temperatures. In this paper, the synthesis and hydrogen storage behavior of new MgVCr BCC and MgTiVCrFe high‐entropy alloys have been studied. The alloys were initially...
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A novel and facile homologous strategy is proposed to construct unique multichannel carbon fiber (MCCF)-based electrode materials for potassium-ion hybrid capacitors.The S-MCCF anodes present high capacity, super rate capability, and long cycle stability in potassium-ion half-cells, and the aMCCF cathodes have a high specific surface area of 1445 m...
Article
Hydrogen has been widely considered as a clean energy carrier that bridges the energy producers and energy consumers in an efficient and safe way for a sustainable society. Hydrogen can be stored in a gas, liquid and solid states and each method has its unique advantage. Though compressed hydrogen and liquefied hydrogen are mature technologies for...
Article
Interactions between the active components with the support are one of the fundamentally factors in determining the catalytic performance of a catalyst. Contrast to the comprehensive understanding on the strong metal-support interactions (SMSI) in metal-based catalysts, it remains unclear for the interactions among different oxides in mixed oxide c...
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The resplendent prospect of water splitting hydrogen production technology makes the development of efficient and stable hydrogen/oxygen evolution reactions (HER/OER) bifunctional catalysts become urgent. Herein, inspired by the density function theory (DFT) calculation result that Ru-dopants have a climbing effect on both OER and HER processes, we...
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Globally, the accelerating use of renewable energy sources, enabled by increased efficiencies and reduced costs, and driven by the need to mitigate the effects of climate change, has significantly increased research in the areas of renewable energy production, storage, distribution and end-use. Central to this discussion is the use of hydrogen, as...
Article
In an effort to realize a sustainable hydrogen economy, we are facing the demanding and challenging issue of providing compact and safe storage solutions for hydrogen in solid-state materials. Studies on the hydrogen storage properties of materials generally involve their phase structures, microstructures, thermal/structural stability, chemical com...
Article
Water splitting is a promising technology for sustainable conversion of hydrogen energy. Rational design of OER&HER bifunctional electrocatalysts with superior activity and stability in the same electrolyte is the key to promoting their large-scale applications. Herein, we report an ultralow Ru amount (1.08 wt%) transition metal phosphide on nickel...
Preprint
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Magnesium hydride owns the largest share of publications on solid materials for hydrogen storage. The Magnesium group of international experts contributing to IEA Task 32 Hydrogen Based Energy Storage recently published two review papers presenting the activities of the group focused on magnesium hydride based materials and on Mg based compounds fo...
Article
Lithium metal has been regarded as one of the most promising anode materials for high-energy-density batteries due to its extremely high theoretical gravimetric capacity of 3860 mAh·g−1 along with its low electrochemical potential of − 3.04 V. Unfortunately, uncontrollable Li dendrite growth and repetitive destruction/formation of the solid electro...
Article
In order to satisfy cyclic stability demand for commercial Ni-MHs anode, a PuNi3 type La0.6Gd0.2Mg0.2Ni2.6Co0.3Al0.1 alloy with excellent overall electrochemical properties was prepared by annealing the as-cast alloy sample at different temprature for a week. The alloy with highest PuNi3 type content reached to 86.9 wt.% (1073 K), which offered a c...
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Amorphous-nanocrystalline (a-nc) boron carbide thin films were prepared by chemical vapor deposition (CVD) by using ortho-carborane as a single-source precursor for inertial confinement fusion (ICF) application. The effects of deposition temperature (Tdep) and total pressure (Ptot) on chemical composition, microstructure, stoichiometry and morpholo...
Article
The unstable solid electrolyte/electrode interface with dendrite growth and resistance increase significantly reduces the safety and efficiency of all-solid-state batteries. Here, we propose an “in-situ LiF nano-decoration” approach to address this issue. By uniform dispersion of ultrafine LiF nanoparticles in amorphous Li2B12H12 matrix that is in-...
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Despite potential of hydride-forming alloys for hydrogen storage, there have been few alloys which can reversibly store hydrogen without heating or activation treatment. In this study, a high-entropy alloy is designed for room temperature hydrogen storage based on three criteria: total valence electron concentration (VEC) of 6.4, single-phase therm...
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The practical application of the lithium–sulfur (Li–S) battery is seriously restricted by its shuttle effect, low conductivity, and low sulfur loading. Herein, first‐principles calculations are conducted to verify that the introduction of oxygen vacancies in TiO2 not only enhances polysulfide adsorption but also greatly improves the catalytic abili...
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Structural observations were carried out on particles obtained after hydrogenation cycling of the Ti25V50Cr25 and Ti10V75Cr15 alloys processed by surface or bulk severe plastic deformation using the surface mechanical attrition treatment (SMAT) and high-pressure torsion (HPT) techniques, respectively. The produced particles differ in morphologies a...
Article
Earth-abundant and low-cost hydrogen evolution reaction (HER) electrocatalysts represent a future direction for achieving sustainable hydrogen energy production. Low-cost amorphous molybdenum sulfides (MoSx), with their highly active HER activity, have emerged as outstanding catalysts for electrochemical hydrogen production. Herein, we report the d...
Article
Various catalysts are developed to enhance the hydrogen storage performances of magnesium based hydride. In particular, the morphology of catalysts governs their surface energy and chemical interactions with Mg and hydrogen, which makes it possible to adjust the hydrogen reaction kinetics of MgH2 through morphological design of the catalysts. Here,...
Article
The influences of Gd and Co co-substitution for La and Ni on the phase structures, and electrochemical properties of La0.83-xGdxMg0.17Ni3.35-2xCo2xAl0.15 (x = 0~0.83) alloys have been investigated. All the alloys contained A2B7-type (Ce2Ni7- and Gd2Co7-type) phase, Pr5Co19-type phase, PuNi3-type phase and CaCu5-type phase. Partial replacement of Gd...
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Hydrogenation of N-heterocycles is of great significance for their wide range of applications such as building blocks in drugs and agrochemicals synthesis and liquid organic hydrogen carriers (LOHCs). Persuing better hydrogenation performance and stereoselectivity, we successfully developed rare earth hydride supported ruthenium catalyst Ru/YH3 for...
Article
Growth of self-aligned single-crystal vanadium carbide nanosheets with a controllable thickness on a unique staked metal substrate Please cite this article as: C. Zhang, Z. Wang, R. Tu, et al., Growth of self-aligned single-crystal vanadium carbide nanosheets with a controllable thickness on a unique staked metal substrate, Applied Surface Science(...
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Realization of facile and green synthesis of low-dimensional nanomaterials is critical not only for energy storage but also for catalysis. A selective aqueous corrosion strategy is presented here for the...
Article
The synthesis of single crystal graphene domains on cold rolling Cu foil has recently been reported. However, the cold rolling Cu foils have many rolling lines that increase the roughness of the foil. In this work, we developed an electrodeposited method to achieve high-quality Cu film on which the nucleation density of graphene decreased greatly....
Article
Designing low-cost and highly efficient electrocatalysts has become a critical aspect to achieve sustainable energy production. Herein, we report the preparation strategy of MoS2 on Co-oxide nanoparticles embedded nitrogen-doped carbon nanosheets (Co-NC) those derived by ZIF-L anchored on a carbon cloth as an electrode for hydrogen evolution reacti...
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A qualitative and quantitative study was performed on the carbonization temperature (TC) and carbonization time (tC) with respect to the microstructure and growth rate (Rg) of a 3C-SiC epitaxial layer on Si (111) substrates by carbonization via laser chemical vapor deposition (LCVD). The results showed that the density and size of the voids depende...
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A novel 2D layered NbTiC solid-solution MXene was synthesized from its MAX phase via a wet chemical etching process. While ball milling the NbTiC MXene with MgH2, ultrafine bimetal NbTi nanocrystals were formed in situ with grain size of 5 nm, which offer highly stable catalytic activity for hydrogen storage reaction of MgH2. The sample prepared fr...
Article
Octahydridoborate, i.e. [B3H8]⁻ containing compounds, have recently attracted interest for hydrogen storage. In the present study, the structural, hydrogen storage, and ion conductivity properties of KB3H8 have been systematically investigated. Two distinct polymorphic transitions are identified for KB3H8 from a monoclinic (α) to an orthorhombic (α...
Article
Aluminium acetylacetonate (Al(acac)3) was used as a precursor to synthesize aluminium oxide (Al2O3) coatings on Ti(C, N)‐based ceramic by microwave plasma CVD (MPCVD). Al2O3 coatings transformed from γ phase to δ phase and α phase and as microwave power (pM) and total pressure (Ptot) increased. The effects of pM and Ptot on the microstructure of th...
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A nanosheet-like lithium borohydride hydrate (LiBH4∙H2O) measuring 20-30 nm in thickness are successfully synthesized for the first time by a facile, scalable freeze-drying strategy. The prepared LiBH4∙H2O nanosheets start releasing hydrogen below 50 ℃ and release an amount up to approximately 10 wt% at 70 ℃ because of the strong affinity of H+ in...