Study on the hydrogen storage property of(TiZr0.1)xCr1.7-yFeyMn0.3(1.05 ＜ x ＜ 1.2, 0.2 ＜ y ＜ 0.6) alloys

作     者：Jigang Li Li Xu Xiaojing Jiang Xingguo Li 

作者机构：College of Chemistry and Molecular Engineering Peking University Material Laboratory of State Grid Corporation of China State Key laboratory of Advanced Transmission Technology Global Energy Interconnection Research InstituteState Grid Corporation of China 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2018年第28卷第4期

页      面：470-477页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：jointly supported by National Natural Science Foundation of China (No. 51431001, 51771002 and 51771002) Beijing Municipal Commission of Science and Technology (Z17110000091702) 

主　　题：Hydrogen storage alloy Ti-Cr type Laves phase PCT Plasma arc melting 

摘      要：The hydrogen storage of(TiZr0.1)xCr1.7-yFeyMn0.3(1.05x1.2,0.2y0.6)alloys,prepared by Ar plasma arc melting,were investigated by X-ray diffraction,pressure-composition-temperature(PCT).The results indicated that all(TiZr0.1)xCr1.7-yFeyMn0.3(1.05≤x≤1.2,0.2≤y≤0.6)alloys were determined as C14-type Laves phase,the cell parameters a,c and unit cell volume of(TiZr0.1)xCr1.1Fe0.6Mn0.3(1.05≤x≤1.2)alloys increased with increasing the(TiZr)super-stoichiometry from 1.05 to 1.2,and the value of a/c almost *** hydrogen absorption and desorption plateau pressure decreased from 5.6,4.4–2.6,2.2 MPa with the increase of(TiZr)super-stoichiometry from 1.05 to1.2 at 274 K respectively,and the hydrogen desorption plateau pressure decline was not obvious when the(TiZr)super-stoichiometry exceeded ***(TiZr0.1)1.1Cr1.1Fe0.6Mn0.3alloy had the best comprehensive properties about the maximum and reversible hydrogen storage capacity was 1.79 and 1.45 wt%*** cell parameters a,c and unit cell volume of(TiZr0.1)1.1Cr1.7-yFeyMn0.3(0.2≤y≤0.6)alloys increased as the ratio of Fe/Cr content *** hydrogenation and dehydrogenation plateau pressure decreased from 4.5,3.4–1.0,0.9 MPa respectively and the maximum hydrogen storage capacity increased from 1.79 to 2.0 wt%as the Fe content reduced from 0.6 to 0.2 at274 *** maximum and the reversible hydrogen storage capacity were about 2.0 and 1.65 wt%as the ratio of Fe/Cr was 0.13(ie,(TiZr0.1)1.1Cr1.5Fe0.2Mn0.3alloy),its relative molar enthalpy of dissociation hydrogen was24.30 kJ/mol H2.