摘要
采用不同的负极片制作方法制备了储氢Mm_(0.3)Ml_(0.7)Ni_(3.55)Co_(0.75)Mn_(0.4)Al_(0.3)合金电极,在夹片式三电极系统中,利用电化学性能测试方法对电极的活化性能、放电容量、高倍率放电能力等进行了测试。结果表明,采用干法时电极的5个平行样的放电容量均高于湿法且活化快,电极中羟基镍粉能有效降低活化次数;电极在所设计的成分范围内,随着电极中羟基镍粉含量的增加,电极的最大放电容量呈现上升趋势,对应成分电极的放电容量处于300~344 mAh/g,比湿法的容量增加3.8%~19.0%;添加不同质量分数的羟基Ni粉,能够有效的提高合金电极在不同大电流下高倍率放电能力;Mm_(0.3)Ml_(0.7)Ni_(3.55)Co_(0.75)Mn_(0.4)Al_(0.3)/200 wt%Ni电极的放电特性最好。
The electrode of hydrogen storageMm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3/xwt%Ni Ni alloy was prepared by different methods. In the patch-type three electrode system, the activation performance, discharge capacity, high rate discharge capacity of the electrodes was investigated by electrochemical methods. The results show that the discharge capacity of 5 parallel samples prepared by the dry process were higher than those of samples prepared by the wet process and the activation is also fast. Hydroxyl nickel powder in the electrode can effectively reduce the numbers of activation. The maximum discharge capacity of the electrode increases with the increase of the content of hydroxy nickel powder in the as-designed range. The discharge capacity of the corresponding electrode is 300-344 mAh/g, which increases by 3.8% -19.0% compared to the electrodes prepared by the wet process. The addition of hydroxyl Ni powder with different mass ~action can effectively improve the high rate discharge capability of the alloy electrode under different high current discharge. Furthermore, discharge characteristics is the best at Mm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3/xwt%Ni electrodes.
出处
《铸造技术》
CAS
2018年第2期295-298,共4页
Foundry Technology
基金
内蒙古机电职业技术学院科研课题资助项目(NJDZJZR1706)
关键词
储氢合金
NI
电化学性能
hydrogen storage alloys
Ni
electrochemical properties
