Identification of a stable phase for the high-capacity hydrogen-storage materialZn(BH4)2from density functional theory and lattice dynamics

2008 ◽  
Vol 77 (13) ◽  
Author(s):  
Pabitra Choudhury ◽  
Venkat R. Bhethanabotla ◽  
Elias Stefanakos
Keyword(s):  
Density Functional Theory ◽  
Hydrogen Storage ◽  
Lattice Dynamics ◽  
Density Functional ◽  
High Capacity ◽  
Stable Phase ◽  
Functional Theory

Density functional theory (DFT) study of BaScO3H0.5 compound and its hydrogen storage properties

2019 ◽  
Vol 97 (11) ◽  
pp. 1191-1199 ◽  
Author(s):  
Aysenur Gencer ◽  
Gokhan Surucu
Keyword(s):  
Density Functional Theory ◽  
Hydrogen Storage ◽  
Density Functional ◽  
Two Dimensions ◽  
Three Dimensions ◽  
Stable Phase ◽  
Partial Density ◽  
Functional Theory ◽  
Hydrogen Storage Properties ◽  
Storage Properties

BaScO3 and its hydride BaScO3H0.5 have been investigated using density functional theory (DFT) with the generalized gradient approximation (GGA). BaScO3 perovskite can crystallize in five possible crystal structures: orthorhombic (Pnma), tetragonal (P4mm), rhombohedral (R-3c), hexagonal (P63/mmc), and cubic (Pm-3m). These five possible phases have been optimized to obtain the most stable phase of BaScO3. The orthorhombic phase, being the most stable and having the lowest volume among the studied phases, has been considered for hydrogen bonding studies, and BaScO3H0.5 has been obtained. The electronic properties including band structure and corresponding partial density of states have been obtained for both BaScO3 and BaScO3H0.5 compounds. In addition, partial charge analysis has been performed. The calculated elastic constants have been used to obtain mechanical properties, such as bulk modulus, shear modulus, Young’s modulus, and Poisson’s ratio. Also, direction-dependent elastic properties have been studied in two dimensions and three dimensions. BaScO3 and BaScO3H0.5 compounds have ionic bonding and they are ductile materials. Moreover, the hydrogen storage properties of BaScO3H0.5 have been investigated and it is found that the gravimetric hydrogen storage capacity is 0.22 wt% and the hydrogen desorption temperature is determined as 1769.70 K.

Reversible hydrogen storage in pristine and Li decorated 2D boron hydride

2018 ◽  
Vol 20 (48) ◽  
pp. 30304-30311 ◽  
Author(s):  
Long Chen ◽  
Xianfei Chen ◽  
Chao Duan ◽  
Yi Huang ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Hydrogen Storage ◽  
Density Functional ◽  
Two Dimensional ◽  
Boron Hydride ◽  
Storage Medium ◽  
Functional Theory ◽  
Hydrogen Storage Medium

Motived by the recent experimental fabrication of two-dimensional boron hydride (BH) sheets (Nishino et al., J. Am. Chem. Soc. 2017, 139, 13761), we explore the feasibility of pristine and Li doped BH sheets as a hydrogen storage medium within the framework of density functional theory.

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