Effect of scandium and zirconium alloying on microstructure and gaseous hydrogen storage properties of YFe3

作者:

Fang, ZK (Fang, Zhikun) [1] ; Wang, H (Wang, Hui) [1] ; Liu, JW (Liu, Jiangwen) [1] ; Ouyang, LZ (Ouyang, Liuzhang) [1] ; Zhu, M (Zhu, Min) [1]

JOURNAL OF RARE EARTHS

卷40

期3

页467-472

DOI10.1016/j.jre.2020.11.015

出版时间MAR 2022

已索引2022-03-21

文献类型Article

摘要

RM3 compounds (R = rare earth metals, M = transition metals) have rarely been studied for gaseous hydrogen storage applications because of unfavorable thermodynamics. In this work, the hydrogen storage properties of a single-phase YFe3 alloy were improved by non-stoichiometric composition and alloying with Sc and Zr. Only the Y1.1-yScyFe3 (y = 0.22, 0.33) alloys consist of a single rhombohedral phase. The Sc substitution for Y leads to the reduction in the unit cell volume of the YFe3 phase, and thus significantly increases the dehydriding equilibrium pressure and decreases the dehydrogenation temperature. The alloy Y0.77Sc0.33Fe3 delivers a decomposition enthalpy change of 33.54 kJ/mol and a lowest dehydrogenation temperature of 135 degrees C, in comparison with 38.99 kJ/mol and 165 degrees C for the alloy Y1.1Fe3. The Zr substitution causes a similar thermodynamic destabilization effect, but the composition and microstructure of Y-Zr-Fe alloys need to be further optimized. (C) 2020 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

关键词

作者关键词Hydrogen storage alloysYFe3AlloyingRare earthsThermodynamic

Keywords PlusELECTROCHEMICAL PROPERTIESINTERMETALLIC COMPOUNDSABSORPTION-DESORPTIONMAGNETIC-PROPERTIESRARE-EARTHHYDRIDESCAPACITYPHASELAPERFORMANCES

作者信息

通讯作者地址

Wang, Hui

(通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China

地址

1 South China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China

电子邮件地址mehwang@scut.edu.cn

类别/分类

研究方向Chemistry