虎门体育官方登录入口网

虎门体育官方登录入口网:标题

Phase transition and hydrogen storage properties of Mg-Ga alloy

虎门体育官方登录入口网:作者

作者:Wu, DF (Wu, Daifeng)^[1 ]; Ouyang, LZ (Ouyang, Liuzhang)^[1,3 ]; Wu, C (Wu, Cong)^[1 ]; Wang, H (Wang, Hui)^[1,3 ]; Liu, JW (Liu, Jiangwen)^[1,3 ]; Sun, LX (Sun, Lixian)^[2 ]; Zhu, M (Zhu, Min)^[1,3 ]

虎门体育官方登录入口网:期刊信息

虎门体育官方登录入口网:摘要

Mg-based alloys are viewed as one of the most promising candidates for hydrogen storage; however, high desorption temperature and the sluggish kinetics of MgH2 hinder their practical application. Alloying and changing the reaction pathway are effective methods to solve these issues. As the solid solubility of Ga in Mg is 5 wt% at 573 K, the preparation of a Mg(Ga) solid solution at relatively high temperatures was designed in this paper. The phase transition and hydrogen storage properties of the MgH2 and Mg5Ga2 composite (hereafter referred to as Mg-Ga alloy) were investigated by X-ray diffraction (XRD), pressure-composition-isotherm (PCI) measurements, and differential scanning calorimetry (DSC). The reversible hydrogen storage capacity of Mg-Ga alloy is 5.7 wt% H-2. During the dehydrogenation process of Mg-Ga alloy, Mg2Ga reacts with MgH2, initially releasing H-2 and forming Mg5Ga2; subsequently, MgH2 decomposes into Mg with further release of H-2. The phase transition mechanism of the Mg5Ga2 compound during the dehydrogenation process was also investigated by using in situ XRD analysis. In addition, the dehydrogenation enthalpy and entropy changes, and the apparent activation energy were also calculated. (C) 2015 Elsevier B.V. All rights reserved.

虎门体育官方登录入口网:关键词

作者关键词:Hydrogen storage; Magnesium-gallium (Mg-Ga); Mechanical alloying; Mg5Ga2 compound

虎门体育官方登录入口网:作者信息

作者信息

通讯作者地址:Ouyang, LZ (通讯作者)

S China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.   增强组织信息的名称     South China University of Technology

地址:

	[ 1 ] S China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 2 ] Guangxi Collaborat Innovat Ctr Struct & Property, Guilin 541004, Peoples R China
	[ 3 ] S China Univ Technol, China Australia Joint Lab Energy & Environm Mat, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology

电子邮件地址:meouyang@scut.edu.cn

虎门体育官方登录入口网:出版商

ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND

虎门体育官方登录入口网:类别分类