Synthesis and Properties of Nanostructured Mg&lt;sub&gt;2&lt;/sub&gt;Ni-Based Compounds

Shao, Huaiyu; Wang, Yun Tao; Li, Xing Guo

doi:10.4028/www.scientific.net/msf.475-479.2445

Cited by 5 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For real storage application, both absorption and desorption properties, including the hydrogen capacity and kinetics, are essential for hydrogen intake and subsequent supply to the SOFC component. The desorption properties and the cycle ability of the Mg-based nanoparticles by hydrogen plasma metal reaction were proved to be good at temperature ranges of 623-673 K, according to our previous investigation [25,48]. Table 3 presents the hydrogen capacity, absorption kinetics and thermal conductivity of different Mg-based materials, with their thermal conductivity being calculated from thermal diffusivity and heat capacity measurements by the laser flash technique [24].…”

Section: Resultsmentioning

confidence: 79%

Heat Modeling and Material Development of Mg-Based Nanomaterials Combined with Solid Oxide Fuel Cell for Stationary Energy Storage

Shao

2017

Energies

Self Cite

View full text Add to dashboard Cite

Mg-based materials have been investigated as hydrogen storage materials, especially for possible onboard storage in fuel cell vehicles for decades. Recently, with the development of large-scale fuel cell technologies, the development of Mg-based materials as stationary storage to supply hydrogen to fuel-cell components and provide electricity and heat is becoming increasingly promising. In this work, numerical analysis of heat balance management for stationary solid oxide fuel cell (SOFC) systems combined with MgH 2 materials based on a carbon-neutral design concept was performed. Waste heat from the SOFC is supplied to hydrogen desorption as endothermic heat for the MgH 2 materials. The net efficiency of this model achieves 82% lower heating value (LHV), and the efficiency of electrical power output becomes 68.6% in minimizing heat output per total energy output when all available heat of waste gas and system is supplied to warm up the storage. For the development of Mg-based hydrogen storage materials, various nano-processing techniques have been widely applied to synthesize Mg-based materials with small particle and crystallite sizes, resulting in good hydrogen storage kinetics, but poor thermal conductivity. Here, three kinds of Mg-based materials were investigated and compared: 325 mesh Mg powers, 300 nm Mg nanoparticles synthesized by hydrogen plasma metal reaction, and Mg 50 Co 50 metastable alloy with body-centered cubic structure. Based on the overall performances of hydrogen capacity, absorption kinetics and thermal conductivity of the materials, the Mg nanoparticle sample by plasma synthesis is the most promising material for this potential application. The findings in this paper may shed light on a new energy conversion and utilization technology on MgH 2-SOFC combined concept.

show abstract

Section: Resultsmentioning

confidence: 79%

Heat Modeling and Material Development of Mg-Based Nanomaterials Combined with Solid Oxide Fuel Cell for Stationary Energy Storage

Shao

2017

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…To overcome these drawbacks, different nanoprocessing techniques are adopted to synthesize Mg-based nanomaterials for hydrogen storage development. These techniques include ball milling, hydrogen plasma metal reaction (HPMR), catalyzed solution chemical synthesis, and nanoconfinement [ 8 , 12 – 27 ]. Particularly, nanoprocessing for the synthesis of nanosized Mg-based materials has gained more and more interest because of the need to increase the surface contact between Mg and hydrogen and to reduce the diffusion distance for hydrogen in particles and grains [ 28 – 30 ].…”

Section: Introductionmentioning

confidence: 99%

Advanced SEM and TEM Techniques Applied in Mg-Based Hydrogen Storage Research

et al. 2018

Scanning

Self Cite

View full text Add to dashboard Cite

Mg-based materials are regarded as one of the most promising candidates for hydrogen storage. In order to clarify the relationship between the structures and properties as well as to understand the reaction and formation mechanisms, it is beneficial to obtain useful information about the size, morphology, and microstructure of the studied materials. Herein, the use of scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques for the representation of Mg-based hydrogen storage materials is described. The basic principles of SEM and TEM are presented and the characterizations of the size, morphology observation, phase and composition determination, and formation and reaction mechanisms clarification of Mg-based hydrogen storage materials are discussed. The applications of advanced SEM and TEM play significant roles in the research and development of the next-generation hydrogen storage materials.

show abstract