Hydrogen storage properties of V0.3Ti0.3Cr0.25Mn0.1Nb0.05 high entropy alloy

被引：31
作者：
Liu, Jingjing [1 ,2 ]
Xu, Jie [1 ]
Sleiman, Salma [2 ]
Ravalison, Francia [2 ]
Zhu, Wei [1 ]
Liu, Hongfei [3 ]
Cheng, Honghui [1 ]
Huot, Jacques [2 ]
机构：
[1] Yangzhou Univ, Sch Mech Engn, Yangzhou 225127, Peoples R China
[2] Univ Quebec Trois Rivieres, Hydrogen Res Inst, 3351 Forges, Trois Rivieres, PQ G9A 5H7, Canada
[3] Yangzhou Univ, Sch Phys Sci & Technol, Yangzhou 225127, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2022年 / 47卷 / 61期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Hydrogen storage material; High entropy alloy; Hydrogen storage property; Cycling stability; KINETICS; CR; PERFORMANCE; STABILITY; MECHANISM; DIFFUSION; CAPACITY; DESIGN; MN; FE;
D O I：
10.1016/j.ijhydene.2022.06.013
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, we present the synthesis, first hydrogenation kinetics, thermodynamics and effect of cycling on the hydrogen storage properties of a V0.3Ti0.3Cr0.25Mn0.1Nb0.05 high entropy alloy. It was found that the V0.3Ti0.3Cr0.25Mn0.1Nb0.05 alloy crystallizes in body-centred cubic (BCC) phase with a small amount of secondary phase. The first hydrogenation is possible at room temperature without incubation time and reaches a maximum hydrogen storage capacity of 3.45 wt%. The pressure composition isotherm (P-C-I) at 298 K shows a reversible hydrogen desorption capacity of 1.78 wt% and a desorption plateau pressure of 80.2 kPa. The capacity loss is mainly due to the stable hydride with the desorption enthalpy of 31.1 kJ/mol and entropy of 101.8 J/K/mol. The hydrogen absorption capacity decreases with cycling due to incomplete desorption at room temperature. The hydrogen absorption kinetics increases with cycling and the rate-limiting step is diffusion-controlled for hydrogen absorption. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：25724 / 25732
页数：9
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