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.
出处
《功能材料与器件学报》
CAS
CSCD
2002年第2期139-143,共5页
Journal of Functional Materials and Devices
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
Ni /MH battery
hydrogen storage alloys
electrochemical performance
high -rate discharge ability
low temperature
