Effects of substituting Cu for Sn on the microstructure and hydrogen absorption properties of Co-free AB5 alloys

Authors

Julio Cesar Serafim Casini, Science and Technology of Rondonia
Franks Silva, Science and Technology of Rondonia
Zaiping Guo, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow
Rubens Nunes Faria, University of Sao Paulo
Hidetoshi Takiishi, University of Sao Paulo

RIS ID

110931

Publication Details

Serafim Casini, J., Silva, F. Martins., Guo, Z., Liu, H. Kun., Faria, R. Nunes. & Takiishi, H. (2016). Effects of substituting Cu for Sn on the microstructure and hydrogen absorption properties of Co-free AB5 alloys. International Journal of Hydrogen Energy, 41 (38), 17022-17028.

Abstract

The effects of substituting Cu for Sn on the microstructure, hydrogen storage capacity of La0.7Mg0.3Al0.3Mn0.4Sn0.5¿xCuxNi3.8 alloys (where X = 0.0, 0.1, 0.2, 0.3, and 0.5) alloys were investigated with X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and pressure-composition isotherms (PCIs). The alloys were mainly composed of three phases: LaNi5, MgNi2, and LaNiSn. However, the La0.7Mg0.3Al0.3Mn0.4Cu0.5Ni3.8 alloy (X = 0.5) exhibited a (La, Mg)Ni3 phase when studied with SEM. The PCI tests showed that increasing the Cu content increases the maximum hydrogen storage capacity.