Metal-Hydride technology: A critical review

Metal hydrides for concentrating solar thermal power energy storage

“…These metal hydride compounds range from Mg2NiH4 with an operating temperature of 260 -400 o C and a theoretical heat storage capacity of 1117 kJ·kg −1 [21] to LiH with an operating temperature above 950 o C and a theoretical heat storage capacity of 8397 kJ·kg −1 . Unlike competing thermochemical heat storage materials [16][17][18][19], reversibility and capacity loss are typically less of an issue in metal hydrides [22][23][24]. The main challenge with metal hydrides for high temperature thermal storage is, instead, finding cost competitive materials and engineering solutions.…”

An iterative method to calculate the thermal characteristics of the rock mass with inaccurate initial data

“…However, calculation formulas in these studies were obtained, as a rule, either as a result of processing of experimental data in relation to specific materials, or by setting a priori distribution of temperature and heat flow in models of the structure of heterogeneous bodies [6]. Material of different inclusions in the composite can have different thermal conductivities [7][8][9][10][11]. In this case, when assessing the effective thermal conductivity, composite is considered as multi-phase [12,13].…”

Deuterium exchange dynamics in Zr2NiD4.8 studied by 2H MAS NMR spectroscopy

“…Metal hydrides are suitable for a plethora of applications including hydrogen fuel storage for stationary systems and vehicles, heat pumps and refrigerators, compressors, batteries, getters and purifiers, and others [1][2][3]. The choice of a hydride for any specific use involves various factors in addition to its net hydrogen content and thermodynamic properties [3].…”

“…Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. 2 H peaks sensitively reflect the exchange behavior among the sites with evident change at around 230 K and reaching a uniform distribution of site occupancies, indistinguishable in NMR timescale, above 245 K. This behavior is reflected by the collapse of the 2 H MAS spectrum into a single peak. From analyses of VT MAS NMR spectra, we were able to extract multiple hopping rates and activation energies among face sharing interstices: for example, 32m 16l hopping shows s …”