摘要
金属氢化物氢压缩技术具有安全、无活动部件、可利用低品废热等优点,但该技术对储氢合金的吸放氢平台压力、平台斜度和滞后效应等性能有较高的要求。研究了合金元素对BCC型V基合金氢压缩性能的影响,采用电弧熔炼法制备了V_(75)Ti_(20)M_(5)(M=V、Ti、Cr、Zr)氢压缩合金,利用体积吸附法测定合金的PCT曲线和动力学性能,计算PCT曲线的平台斜度、滞后效应、氢压缩比及氢反应速率,比较合金的氢压缩性能。结果表明:V_(75)Ti_(20)Cr_(5)合金的可逆储氢量为1.05%(质量分数),相比于V_(75)Ti_(25)合金,其氢压缩速率显著提升;而V_(75)Ti_(20)Zr_(5)合金的可逆储氢量、氢压缩比和氢压缩速率均明显降低。
Metal hydride hydrogen compression technology has the advantages of good safety,no moving parts,and the ability to use low-grade waste heat.However,this technology has high requirements for the hydrogen sorption plateau pressure,plateau slope,hysteresis of hydrogen storage alloys.In this paper,the influence of the addition of alloying elements on the hydrogen compression properties of BCC structure vanadium-based alloys is studied.The V_(75)Ti_(20)M_(5)(M=V,Ti,Cr or Zr)hydrogen compression alloys were prepared by the arc melting method,using volume adsorption method to determinate the PCT curve and kinetic properties,and the plateau slope,hysteresis effect,hydrogen compression ratio and hydrogen reaction rate of the alloy PCT curve were obtained by calculation to compare the hydrogen compression properties of alloys.The results show that the reversible hydrogen storage capacity of V_(75)Ti_(20)Cr_(5) alloy is 1.05 wt%.Compared with V_(75)Ti_(25) alloy,the hydrogen compression rate is significantly improved,and V_(75)Ti_(20)Zr_(5) significantly reduces the reversible hydrogen storage,hydrogen compression ratio and hydrogen compression rate of the alloy.
作者
高云鹤
李珂
刘煌
周承商
GAO Yunhe;LI Ke;LIU Huang;ZHOU Chengshang(State Key Laboratory of PowderMetallurgy, Central South University, Changsha 410083, China)
出处
《功能材料》
CAS
CSCD
北大核心
2022年第6期6006-6013,共8页
Journal of Functional Materials
基金
国家自然科学基金项目(51704336)
中南大学创新驱动计划项目(2020CX025)。
关键词
氢压缩
V基合金
储氢合金
hydrogen compression
V-based alloy
hydrogen storage alloy
