首页|Comprehensive hydrogen storage properties of free-Ⅴ Ti1-xZrxMn0.9Cro7Fe0.1 alloys with different Zr substitution content
Comprehensive hydrogen storage properties of free-Ⅴ Ti1-xZrxMn0.9Cro7Fe0.1 alloys with different Zr substitution content
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Hydrogen has been widely recognized as a promising new renewable energy source.Developing safe and efficient hydrogen storage technologies is crucial for scaling up hydrogen energy applications.AB2-type Ti-Mn-based hydrogen storage alloys have excellent kinetic and activation properties,but their comprehensive hydrogen storage performance,especially the hydrogen storage capacity,platform pressure,and cycling stability of low-cost Ti-Mn-based alloys without V,needs to be further optimized.Hence,the hydrogen storage properties of the Ti1.xZrxMn0.9Cr0.7Fe0.1(x=0.05,0.16,0.20,0.25)were systematically studied.All of the series alloys contained a single C14-type Laves phase structure.Increasing the substitution of Zr for Ti resulted in higher hydrogen storage capacities and lower plateau pressures.Notably,the effective hydrogen storage capacity of x=0.16 alloy is significantly higher than that of the other alloys,and its platform pressure is the most suitable.This alloy achieved a hydrogen content of 1.8 wt％and demonstrated excellent cycling stability,retaining 98.6％of its capacity after 100 cycles.This study provides a theoretical guideline for optimizing the properties of low-cost TiMn-based alloys without V.
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