Effect of Heat Treatment on the Electrochemical Properties of La0.6Ce0.2Pr0.05Nd0.15Ni3.55Co0.3Mn0.4Al0.3(Cu0.96Be0.04)0.45 Hydrogen Storage Alloy
- DOI
- 10.2991/iccte-16.2016.151How to use a DOI?
- Keywords
- AB 5 -type hydrogen storage alloy;Microstructure characteristics;Hydrogen absorbing materials
- Abstract
In this study, La0.6Ce0.2Pr0.05Nd0.15Ni3.55Co0.3Mn0.4Al0.3(Cu0.96Be0.04)0.45 alloy was heat treated for 4 h in argon atmosphere at 923, 1023, and 1123 K, respectively. The results of scanning electron microscopy indicated that surface morphology of the heat-treated alloys changed significantly. Before heat treatment, heterogeneous structure of the alloy was composed of white, black, and gray matrix phase, respectively. With the increase in heat treatment temperature, the composition of matrix phase became increasingly uniform. When heat treatment temperature was relatively low (923 K), the black phase with low melting point was distributed homogeneously. When the temperature increased to 1023 and 1273 K, the gray phase increased. Discharge capacity of the four types of alloys with discharge cut-off voltage of 1.2 V was presented. In the first cycle, the capacity of three heat-treated alloys was less than 158.3 mAh g 1, which was similar to the capacity of alloy without heat treatment. For alloy without heat treatment, maximum capacity reached up to 230.1 mAh g-1 in the third cycle, and the maximum capacity of alloy b reached up to 227.5 mAh g-1 in the third cycle. The maximum capacity of alloy c reached up to 228.2 mAh g-1 in the third cycle. The maximum capacity of alloy d reached up to 224.9mAh g-1 in the third cycle.
- Copyright
- © 2016, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Xiaoqiang Han AU - Wenyuan Wu AU - Xue Bian PY - 2016/01 DA - 2016/01 TI - Effect of Heat Treatment on the Electrochemical Properties of La0.6Ce0.2Pr0.05Nd0.15Ni3.55Co0.3Mn0.4Al0.3(Cu0.96Be0.04)0.45 Hydrogen Storage Alloy BT - Proceedings of the 2016 International Conference on Civil, Transportation and Environment PB - Atlantis Press SP - 880 EP - 883 SN - 2352-5401 UR - https://doi.org/10.2991/iccte-16.2016.151 DO - 10.2991/iccte-16.2016.151 ID - Han2016/01 ER -