Achieving high equilibrium pressure and low hysteresis of Zr-Fe based hydrogen storage alloy by Cr/V substitution
作者:Zhou, C (Zhou, C.)[ 1 ] ; Wang, H (Wang, H.)[ 1 ] ; Ouyang, LZ (Ouyang, L. Z.)[ 1 ] ; Liu, JW (Liu, J. W.)[ 1 ] ; Zhu, M (Zhu, M.)[ 1 ]
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JOURNAL OF ALLOYS AND COMPOUNDS
卷: 806 页: 1436-1444
DOI: 10.1016/j.jallcom.2019.07.170
出版年: OCT 25 2019
文献类型:Article
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摘要
Owing to fast kinetics, high equilibrium pressure and impressive volumetric hydrogen storage density at ambient temperature, ZrFe2 based alloys are promising candidates to composite with high pressure compressed hydrogen tanks and thus reduce the working pressure and volume of high pressure tanks. However, simple ZrFe2 alloy exhibits rather high de-/hydriding equilibrium pressure and large hysteresis, which are not coupled with the dis-/charging performances of high pressure tanks. In this work, to tune the plateau characteristics and hysteresis of ZrFe2 alloys for potential application in high-pressure hybrid hydrogen storage tanks, the effects of Cr/V element substitution for Fe on the phase structure and hydrogen storage behaviors were systematically investigated in Zr1.05Fe2-xCrx (0.1 <= x <= 0.3) and Zr1.05Fe1.85Cr0.15-xVx (x = 0.05, 0.075, 0.1). It has been found that the Cr and V substitution could effectively decrease the equilibrium pressure due to the enlarged unit cell of Laves phase, while the V substitution could greatly improve the hysteresis phenomenon. However, too high Cr addition (x = 0.3) led to structure transition from C15 to C14 for the Zr1.05Fe2-xCrx. The alloy Zr1.05Fe1.85Cr0.075V0.075 shows the best overall hydrogen storage properties with the capacity of 1.54 wt%, and the absorption and desorption equilibrium pressure of 13.63 atm and 9.73 atm respectively at 243 K. The equilibrium pressure of Zr1.05Fe1.85Cr0.075V0.075 at ambient temperature could meet the requirements of high-pressure hybrid hydrogen tanks. (C) 2019 Elsevier B.V. All rights reserved.
关键词
作者关键词:Hydrogen storage alloys; ZrFe2; Alloying; Hydrogen storage; Thermodynamics; Hysteresis
KeyWords Plus:METAL HYDRIDE; LAVES PHASES; TI; VESSEL; AL; STABILITY; BINARY
作者信息
通讯作者地址: Zhu, M (通讯作者)
显示更多South China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China.
地址:
显示更多[ 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:memzhu@scut.edu.cn
基金资助致谢
基金资助机构显示详情授权号
National Natural Science Foundation of China
U1601212
51431001
National Natural Science Foundation of China
51621001
National Natural Science Foundation of Guangdong Province
2016A030312011
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出版商
ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
期刊信息
Impact Factor (影响因子): Journal Citation Reports
类别 / 分类
研究方向:Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
Web of Science 类别:Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering