中文摘要：

为了探索一种新的掺杂方式对AB5型贮氢合金贮氢性能的影响,采用熔炼掺杂方法制备La-Ni3.8Co1.1Mn0.1/TiMn1.5（TiMn1.5质量分数为4%、8%）贮氢合金,利用PCTPro-2000气体吸附测量仪研究了合金的气态储氢性能。XRD和SEM分析显示,熔炼掺杂后合金主相为LaNi5相,出现少量（NiCo）3Ti相。P-C-T测试结果表明,（NiCo）3Ti相的出现对合金气态贮氢性能有较大影响,熔炼掺杂后合金吸放氢平台压和滞后效应降低,贮氢容量减少。掺杂TiMn1.5使得合金的氢化物的生成焓由原始合金的-27.35kJ/mol降至-29.14kJ/mol（掺杂质量分数8%的TiMn1.5）,较高温度有利于合金中氢的释放,同时掺杂形成的（NiCo）3Ti相改善了合金吸/放氢动力学性能。

英文摘要：

To explore the affection of a new way doping on AB5-type hydrogen storage alloys,LaNi3.8Co1.1Mn0.1/TiMn1.5（TiMn1.5：4%,8%）hydrogen storage alloys were prepared by melt-doping in an argon atmosphere,and its Gaseous hydrogen storage properties were measured with PCTPro-2000 gas sorption analyzer.XRD analysis indicate that the doped alloy samples consist of a main LaNi5 phase and small（NiCo）3Ti phase.P-C-T curves show that the pressure plateau and lag effect dropped,while the hydrogen absorption capacity fall due to the formation of（NiCo）3Ti phase in melt-doping process.In addition,enthalpy of formation（-ΔH） of the hydride decreased from-27.35 kJ/mol H2（original alloy） to-29.14 kJ/mol H2（8% TiMn1.5 doped）.Higher temperature is beneficial to desorption properties of these hydrides,and the existence of（NiCo）3Ti phase is good for the improvement of absorption/desorption kinetics.