Metal hydride electrodes studied by QCM technique

P. BARATH; P. SPICAK; M. SEDLAØÍKOVÁ; J. KAZELLE; A, VISINTIN; J. VONDRAK

Foz de Iguaçú, Brasil

Congreso; ISE 2008 Spring Meeting; 2008

International Society of Electrochemistry

The use of Ni–MH batteries for traction applications in electric and hybrid vehicles is increasingly attractive and reliable. Besides the energy and power handling, and the cost issues, high tolerance to abuse is an important aspect of the Ni–MH technology. We have studied the LmNi4.1Co0.4 Mn0.4 Al0.3 in thin thick layer deposition on QCM crystal. We have studied the absorption/desorption of hydrogen. The electrochemical quartz crystal microbalance (QCM) was applied to the study of LmNi4.1Co0.4 Mn0.4 Al0.3 thin layer electrodes as measure technique. We have used the Pt and Au crystal matrix for deposition. We compare their mass changes dependents on absorption-desorption and oxidation-reduction reactions in metal hydride thin layer electrodes of hydrogen. The deposit was prepared by mixing of alloy with carbon black in mixed in the ball milling. We activated the material after deposition on crystal in galvanostatic and potenciodinamic way. The effect of the hydrogen evolution in the different subtracts was analyzed with the change of the mass.