Electrochemical Properties of La-Mg-Ni Based Negative Electrodes through Electroless-Deposition

被引：0
|
作者：
Xu J. [1 ]
Hu F. [1 ]
Zhang G. [1 ]
Li Y. [1 ]
Li X. [1 ]
Zhang Y. [1 ]
机构：
[1] School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou
来源：
Xiyou Jinshu/Chinese Journal of Rare Metals | 2020年 / 44卷 / 05期
关键词：
Electroless-deposition; La-Mg-Ni-based alloy negative electrodes; Optimum treatment conditions;
D O I：
10.13373/j.cnki.cjrm.XY18120001
中图分类号：
学科分类号：
摘要：
In order to improve overall electrochemical properties of super lattice RE-Mg-Ni based negative materials, the W-P-Ni/Y3+ electroless-deposition on the surface of La0.75Mg0.25Ni3.4Al0.1 hydrogen storage alloy particles was prepared using NaH2PO2 as reducing agent. The electrochemical properties of the alloy electrodes of the different condition (concentration of reducing agents, temperature of reaction and time) were investigated by orthogonal experimental design L9(34), the optimum echnique was determined and processing the data with range analysis and variance analysis. Scanning electron microscopy dispersive spectrometer (SEM-EDS) results showed that spherical Y-Ni-W-P sediment particles coated on the alloy. The electrochemical tests showed that the coated hydrogen storage alloy electrodes could lead to significantly increase in the activation number, the cyclic stability, high-rate discharge ability, exchange current density and limiting current density. All of the above indicated that the technique of W-Ni-P coating by chemical plating could effectively improve the electrochemical performance of hydrogen storage alloy electrodes. Processing temperature was the most significant factors of electrode cycle life and discharge capacity. The suitable treatment conditions were: concentration of NaH2PO2 25 g•L-1, temperature of reaction 80℃, time 30 min. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.
引用
收藏
页码：491 / 498
页数：7
相关论文
共 23 条
  • [1] Kadir K, Sakai T, Uehara I., Synthesis and structure determination of a new series of hydrogen storage alloys
  • [2] RMg<sub>2</sub>Ni<sub>9</sub> (R=La, Ce, Pr, Nd, Sm and Gd) built from MgNi<sub>2</sub> Laves-type layers alternating with AB<sub>5</sub> layers, J. Alloys and Compd, 257, (1997)
  • [3] Nowak M, Balcerzak M, Jurczyk M., Hydrogen storage and electrochemical properties of mechanically alloyed La<sub>1.5-x</sub>Gd<sub>x</sub>Mg<sub>0.5</sub>Ni<sub>7</sub> (0≤x≤1.5), International Journal of Hydrogen Energy, 43, 18, (2018)
  • [4] Luo L, Wu W Y, Bian X, Li P Y, Qi J B., Research progress of composite hydrogen storage materials based on AB<sub>5</sub> alloy, Chinese Journal of Rare Metals, 42, 5, (2018)
  • [5] Li Y M, Zhang Y H, Ren H P., Degradation characters of La-Mg-Ni-based metal hydride alloys: corrosion and pulverization behaviors, Acta Metallurgica Sinica, 31, 7, (2018)
  • [6] Gao Z J, Zhang B, Luo Y C, Li H W., Correlation between phase structure and electrochemical properties of Ce<sub>2</sub>Ni<sub>7</sub>-type La-RE-Mg-Ni (RE=Nd, Sm, Y) alloys: a comparative study, Journal of the Taiwan Institute of Chemical Engineers, 89, (2018)
  • [7] Wang H, Luo Y C, Deng A Q, Zhao L., Research on La-Mg-Ni system A<sub>2</sub>B<sub>7</sub>-type hydrogen storage alloysurface coating NAFION and electrochemical performance, Metallic Functional Material, 25, 1, (2018)
  • [8] Wang Y B, Tang W K, Wang F, Ding C P, Xu S M, Yu R H., Effects of surface coating with Cu-Pd on electrochemical properties of A<sub>2</sub>B<sub>7</sub>-type hydrogen storage alloy, International Journal of Hydrogen Energy, 43, 6, (2018)
  • [9] Wang F, Li R F, Ding C P, Wan J, Yu R H, Wang Z M., Effect of catalytic Ni coating with different depositing time on the hydrogen storage properties of ZrCo alloy, International Journal of Hydrogen Energy, 41, 39, (2016)
  • [10] Li Y, Wang C X, Dong Z T., Effects of coating layers on electrochemical properties of Nd Mg Ni-based alloys, International Journal of Hydrogen Energy, 42, 30, (2017)
123