Effect of long-term hydrogen absorption/desorption cycling on hydrogen storage properties of MmNi3.55Co0.75Mn0.4Al0.3
作者： S.L. Li , W. Chen , D.M. Chen , K. Yang
DOI: 10.1016/J.JALLCOM.2008.06.154
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摘要: The effect of a long-term hydrogen absorption/desorption cycling up to 2000 cycles on the storage properties MmNi(3.55)Co(0.75)Mn(0.4)Al(0.3) alloy was investigated. pressure-composition (PC) isotherms for and absorption kinetics were measured at 338 K, 353 K 368 both after initial activation cycles. X-ray diffraction analysis revealed that had homogeneous hexagonal CaCu(5) type structure kept this even It is found plateau pressures lowered, capacity slightly degraded hysteresis loss increased all investigated temperatures also particle size much smaller compared activation. change has been explained by considering crystal structure, disproportionation property, pulverization sample impurities in charging employed cycling. (C) 2008 Elsevier B.V. All rights reserved.
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