高功率型和低温型镍氢电池用掺硼贮氢合金的研究  

Study of hydrogen storage alloy doped with boron for high-power type and low-temperature type Ni/MH battery

作　　者：叶辉[1] 李志林[1] 吴铸[1] 张宏[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所能源室,上海200050

出　　处：《功能材料与器件学报》2002年第2期139-143,共5页Journal of Functional Materials and Devices

摘　　要：Ni/MH电池负极的高倍率性能和低温放电性能的提高应当受到重视。采用廉价的硼镍合金(B-Ni)作为掺硼添加剂,有效地改善常用MlNi3.55Co0.75Mn0.4Al0.3贮氢合金的高倍率性能和低温放电性能。实验结果表明,掺硼合金由于形成含CeCo4B相的复相结构可显著提高合金的电化学动力学性能,掺硼的MlNi3.55Co0.75Mn0.4Al0.3B0.3合金能够满足高功率型Ni/MH电池的高倍率性能和低温型Ni/MH电池在低温-35℃下的小倍率放电(120mA/g)的要求。It is important to improve the high -rate discharge ability and low -temp erature discharge performance of negative electrode o f Ni /MH battery.The two important performances above of commercial MlNi 3.55 Co 0.75 Mn 0.4 Al 0.3 hydrogen storage alloy were improve d by using B -Ni alloy as B additive .The results show that the a lloy doped with B exhibits has superior electrochemical kinetic properties,which can be ascribed to the formation of CeCo 4 B type secondary phase.MlNi 3.55 Co 0.75 Mn 0.4 -Al 0.3 B 0.3 hydrogen storage alloy can meet the r equirements of high -power type and l ow -temperature type Ni /MH battery.

关 键 词：高功率型 低温型 镍氢电池 掺硼 贮氢合金 电化学性能 

分 类 号：TM912.1[电气工程—电力电子与电力传动] TG139.7[一般工业技术—材料科学与工程]