ELINER AFFONSO FERREIRA
6 resultados
Resultados de Busca
Agora exibindo 1 - 6 de 6
Artigo IPEN-doc 20829 Effect of Sn substitution for Co on microstructure and electrochemical performance of ABsub(5) type Lasub(0.7)Mgsub(0.3)Mnsub(0.4)Cosub(0.5)-sub(x)Snsub(3.8)(x=0-0.5) alloys2015 - CASINI, JULIO C.S.; GUO, ZAIPING; LIU, HUA K.; FERREIRA, ELINER A.; FARIA, RUBENS N.; TAKIISHI, HIDETOSHI: The effects of substitution of Sn for Co on the microstructure, hydrogen storage and electrochemical discharge capacity of La0.7Mg0.3Al0.3Mn0.4Co0.5−xSnxNi3.8 (x=0, 0.1, 0.2, 0.3 and 0.5) alloys were investigated using X-ray diffraction (XRD), pressure composition isotherm (PCT) and electrochemical discharge cycle. XRD, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) tests showed that all of alloys are mainly composed of LaNi5 and MgNi2 phases, but when increasing the content of Sn in alloys, the LaNiSn phase appears and microstructure is refined. The PCT showed that increasing substitution of Sn for Co results in decrease of the maximum hydrogen storage capacity from 1.48% (x=0) to 0.85% (x=0.5). The electrochemical tests indicated that the maximum discharge capacity decreases from 337.1 mA·h/g (x=0) to 239.8 mA·h/g (x=0.5); however, the discharge capacity retention at the 100th cycle increases from 70.2% (x=0) to 78.0% (x=0.5).Resumo IPEN-doc 17966 Study on hydrogenation of the La0.7-xMgxPr0.3Al0.3Mn0.4Co0.5Ni3.8 (x=0.0, 0.1 and 0.3) alloys for nickel - metal hydride batteries2011 - CASINI, J.C.S.; GALDINO, G.S.; FERREIRA, E.A.; FARIA, R.N.; TAKIISHI, H.Artigo IPEN-doc 17926 Microstructure and electrochemical properties of a LaMgAlMnCoNi based alloy for Ni/MH batteries2011 - FERREIRA, E.A.; SERRA, J.M.; CASINI, J.C.S.; TAKIISHI, H.; FARIA, R.N.Artigo IPEN-doc 18816 Microstructure and electrochemical properties of a LaMgAlMnCoNi based alloy for Ni/MH batteries2012 - FERREIRA, E.A.; SERRA, J.M.; CASINI, J.C.S.; TAKIISHI, H.; FARIA, R.N.Artigo IPEN-doc 16541 Hydrogenation and discharge capacity of a Lasub(0.7)Mgsub(0.3)Alsub(0.3)Mnsub(0.4)Cosub(0.5)Nisub(3.8) alloy for nickel-metal hydride batteries2010 - CASINI, JULIO C.S.; ZARPELON, LIA M.C.; FERREIRA, ELINER A.; TAKIISHI, HIDETOSHI; FARIA JUNIOR, RUBENS N. deArtigo IPEN-doc 16545 The effect of high charging rates activation on the specific discharge capacity and efficiency of a negative electrode based on a LaMgAlMnCoNi alloy2010 - FERREIRA, E.A.; ZARPELON, L.M.C.; CASINI, J.C.S.; TAKIISHI, H.; FARIA, R.N.