The physical characters and electrochemical properties of various phases in a Sn-Zn electrode,such as formation energy,plateau potential,specific capacity,as well as volume expansion,were calculated by the first-principles plane-wave pseudo-potential method based on the density functional theory.Sn-Zn films were also deposited on copper foils by an electroless plating technique.The actual composition and chemical characters were explored by scanning electron microscopy (SEM),X-ray diffraction (XRD),plasma atomic emission spectrometry (ICP),and constant current charge/discharge measurements (CC).The results show that separation phases with tin and zinc including a small quantity of Cu6Sn5 phase were obtained,the initial lithium insertion capacity of the Sn-Zn film was 661 mAh/g,and obvious potential plateaus of about 0.4 V and 0.7 V were displayed,which is in accordance with the results of theoretical calculations.The capacity of the Sn-Zn film decreased seriously with the increase of cycle number.
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机译:materialmodell没有。 72 foer Betong:Erfarenheter fran en Experimentell och Numberisk studie(material modell no.72 for concrete-Experience from a Experimental and Numerical study)。