AB_5型贮氢合金放电容量的影响因素  

Factors Affecting the Discharge Capacity of AB_5-Type Hydrogen Storage Alloys

作　　者：张昭良[1] 孙东升[2] 

机构地区：[1]北京大学化学与分子工程学院,北京100871 [2]山东工业大学材料科学与工程学院,山东250061

出　　处：《电池》1999年第2期64-66,共3页Battery Bimonthly

摘　　要：研究了稀土元素，粉碎工艺和粒度对REB5(B5=Ni(3.55)Co(0.75)Mn(0.4)Al(0.3))合金放电容量的影响。结果表明：（1）钕取代部分镧的La(1-x)B5合金在．x=0.2处放电容量有一极大值。而镨取代部分镧的La(1-x)PrxB5合金在x=0．15处放电容量有一极大值.CeNdB5合金放电容量很低，几乎没有实用价值；(2)La(0.65)Nd(0.2)Pr(0.15)B5合金颗粒尺寸在54～74μm和30μm以下具有较高的放电容量。The effects of rare-earth elements, pulverization methods and particle sizes on discharge capacity of AB5 -type hydrogen storage alloys have been investigated. (1) The La1-x NdxB5 alloy electrode with substitution of La by Nd showed a maximum capacity at x = 0. 2, while La1- xPrxB5 alloy electrode with substitution of La by Pr showed a maximum capacity at x = 0. 15. It was also shown that the Ce1 -xNdxB5 alloy electrode had a much low capacity. (2 )The La0.65 Nd0.2Pr0.15B5 alloy electrode compoxed of particles with size of 54-74 μm(200 ~300 mesh) and below 30 μm (500 mesh)showed a high discharge capacity.

关 键 词：MH/NI电池 负极材料 贮氢合金 放电容量 AB5型 

分 类 号：TM912.203[电气工程—电力电子与电力传动] TM241[一般工业技术—材料科学与工程]