Abstract
The present communication reports the hydrogen storage characteristics of ZrMn2−xNi x laves phase hydrides. It is observed that promising hydrogen storage materials can be tailored when “x” is in the range of 1.5 ≤ x ≥ 1. The materials formed within this range reversibly store ~2 to ~3 H/F.U. under manageable operating conditions. The composition ZrMn0.5Ni1.5 is found to absorb and desorb hydrogen under room temperature. The other two compositions ZrMn0.75Ni1.25 and ZrMnNi absorb ~3.6 H/F.U. and release ~3 and ~3.2 H/F.U., respectively. In each case, almost half of the effective storage capacity of total can be reversibly stored within 5 s under room temperature. Therefore, the materials falling within the range of 1.5 ≤ x ≥ 1 are promising candidates for stationary device applications. The correlation between the compositions, structural–microstructural features and thermodynamic data are presented.
Highlights
ZrMn2 laves phase alloy attracts much attention due to its higher storage capacity (*1.7 wt%) with rapid H absorption kinetics [1]
It is observed that promising hydrogen storage materials can be tailored when ‘‘x’’ is in the range of 1.5 B x C 1
Almost half of the effective storage capacity of total can be reversibly stored within 5 s under room temperature
Summary
ZrMn2 laves phase alloy attracts much attention due to its higher storage capacity (*1.7 wt%) with rapid H absorption kinetics [1]. Abstract The present communication reports the hydrogen storage characteristics of ZrMn2-xNix laves phase hydrides. The XRDs of hydrogenated samples of ZrMnNi and ZrMn0.75Ni1.25 exhibit a considerable shifting toward the lower angle side.
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