Zhang Xin Bo, Sun Dan Zi, Yin Wen Ya, Chai Yu Jun, Zhao Min Shou
Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences 5625 Remin Street, Changchun 130022, PR China.
Chemphyschem. 2005 Mar;6(3):520-5. doi: 10.1002/cphc.200400470.
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.
系统研究了La(0.7)Mg(0.3)Ni(5.0 - x)(Al(0.5)Mo(0.5))x（x = 0 - 0.8）储氢合金的结构、储氢性能和电化学特性。X射线衍射Rietveld分析表明，所有合金均由La(La,Mg)2Ni9相和LaNi5相组成。压力 - 组成等温线表明，储氢容量随x增大先增加后减小，平衡压力随x增大而降低。电化学测量表明，合金电极的最大放电容量和交换电流密度在x从0增加到0.6时增大，而当x从0.6进一步增加到0.8时减小。此外，合金电极的低温放电能力随合金中x的增加而单调增加。
