• Rubens Nunes De Faria, Jr.
• Casini, Julio César Serafim
• Ferreira, Eliner Affonso
• Serra, J. M.
• Takiishi, Hidetoshi

Abstract

<jats:p>The microstructure and electrochemical properties of a La<jats:sub>0.7</jats:sub>Mg<jats:sub>0.3</jats:sub>Al<jats:sub>0.3</jats:sub>Mn<jats:sub>0</jats:sub>.<jats:sub>4</jats:sub>Co<jats:sub>0</jats:sub>.<jats:sub>5</jats:sub>Ni<jats:sub>3.8 </jats:sub>hydrogen storage alloy have been studied. The anode was prepared using a mixture of the ingot alloy in the as-cast state with carbon black and polytetrafluoroethylene (PTFE) as a binder. A Ni (OH)<jats:sub>2</jats:sub> electrode was used as the cathode of the square-type test cell. A separator was used together with a 6M KOH electrolyte. Microstructure and phase composition of the alloy have been investigated using inductively coupled plasma atomic emission spectrometry (ICP-AES), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction analysis (XRD). A niobium-containing alloy has also been included for a comparison.</jats:p>

Topics

• microstructure
• Carbon
• phase
• scanning electron microscopy
• x-ray diffraction
• Hydrogen
• Energy-dispersive X-ray spectroscopy
• spectrometry
• atomic emission spectroscopy
• Auger electron spectroscopy
• niobium