| Phase structure and electrochemical properties of melt-spinning alloy Zr(MnVNi)_(2.4) |
| |
| 作者姓名： | 张书凯 舒康颖 雷永泉 吕光烈 王启东 |
| |
| 作者单位： | Department of Materials Science and Engineering，Department of Materials Science and Engineering，Ningbo Yunsheng Magnetic Material and Engineering Research Institute，Central Laboratory，Ningbo Yunsheng Magnetic Material and Engineering Research Institute Zhejiang University，Hangzhou 310027，China，Zhejiang University，Hangzhou 310027，China，Yunsheng Group，Ningbo 315041，China，Zhejiang University，Hangzhou 310028，China，Yunsheng Group，Ningbo 315041，China |
| |
| 基金项目： | Project(863 715 0 0 40060)supportedbytheNationalAdvancedMaterialsCommitteeofChina |
| |
| 摘 要： | 1 INTRODUCTIONItiswellknownthatZr basedAB2 LavesphasealloyelectrodeshavehigherdischargecapacityandmuchbettercyclingstabilitythanthatofAB5alloysalthoughitisexpensivecomparedtoAB5alloys .HowtofurtherimprovetheratioofpropertiesandpriceofAB2 alloyshasbeendrawingtheinterestofmanyin vestigators .Someinvestigationsrevealedthatover stoichiometricAB5typealloyshadbettercharge dis chargecyclingstabilitythanstoichiometricalloys15] ,andsomeover stoichiometricAB2 typealloysshowedhigherdischargec…
|
Phase structure and electrochemical properties of melt-spinning alloy Zr(MnVNi)2.4 |
| |
| Abstract: | Zr(Mn0.2V0.2Ni0.6)2.4 alloy was prepared by using both arc-melting and melt-spinning processes. The XRD results indicate that the as-cast alloy contains two Laves phases, C14 (15.45%) and C15 (76.48%), and the non-Laves phase Zr7M10 (8.07%, M presents Ni, Mn, V). Meanwhile the melt-spun alloy only has the C14 (27.67%) and C15 (69.43%) Laves phases. The electrochemical test indicates that the melt-spun alloy has much better cycling stability (S500=90.8%), higher discharge capacity (Cmax=347.5 mA*h*g-1) than those of as-cast alloy (S500=80.9%, Cmax=340.8 mA*h*g-1), although its activation property and high-rate-dischargeability decrease somewhat. The different electrochemical properties between the melt-spun and as-cast alloys are resulted from the different phase composition, phase abundance and microstructure. |
| |
| Keywords: | AB 2 type alloys melt spun over stoichiometry electrochemical properties microstructure |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
