title: Crystallographic and electrochemical characteristics of La(0.7)Mg(0.3)Ni(5.0-x)(Al(0.5)Mo(0.5)x hydrogen-storage alloys.
abstract: The structure, hydrogen-storage property and electrochemical characteristics of La(0.7)Mg(0.3)Ni(5.0-x)(Al(0.5)Mo(0.5))x (x = 0-0.8) hydrogen-storage alloys have been studied systematically. X-ray diffraction Rietveld analysis shows that all the alloys consist of an La (La,Mg)2Ni9 phase and an LaNi5 phase. The pressure-composition isotherms indicate that the hydrogen-storage capacity first increases and then decreases with increasing x, and the equilibrium pressure decreases with increasing x. Electrochemical measurements show that the maximum discharge capacity and the exchange-current density of the alloy electrodes increase as x increases from 0 to 0.6 and then decrease when x increases further from 0.6 to 0.8. Moreover, the low-temperature dischargeability of the alloy electrodes increases monotonically with increasing x in the alloys.
authors.affiliation: Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences 5625 Remin Street, Changchun 130022, PR China.
authors.forename: Xin Bo
authors.initials: XB
authors.lastname: Zhang
authors.forename: Dan Zi
authors.initials: DZ
authors.lastname: Sun
authors.forename: Wen Ya
authors.initials: WY
authors.lastname: Yin
authors.forename: Yu Jun
authors.initials: YJ
authors.lastname: Chai
authors.forename: Min Shou
authors.initials: MS
authors.lastname: Zhao