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Electrochemical Properties of MgNi-ZrB Hydrogen Storage Alloys
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Electrochemical Properties of MgNi-ZrB Hydrogen Storage Alloys
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The Natural Science Foundation of Jiangsu Education Committee of China (13KJB480004)

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    摘要:

    通過機(jī)械球磨法制備了一系列的MgNi、ZrB和MgNi-ZrB儲氫合金。通過XRD、SEM、充放電性能、循環(huán)伏安、塔菲爾極化曲線、交流阻抗測試，研究了ZrB的添加對MgNi合金的儲氫性能的影響。結(jié)果表面，ZrB的添加大大提高了MgNi合金的電化學(xué)性能。球磨15 h的MgNi-ZrB (100:5)復(fù)合物體現(xiàn)出最好的電化學(xué)性能，循環(huán)20周和50周時(shí)的放電容量分別為226和209 mAh·g-1，遠(yuǎn)遠(yuǎn)高于MgNi合金的放電容量。動態(tài)極化曲線和交流阻抗測試顯示ZrB的添加極大的提高了MgNi合金的抗腐蝕性能和電化學(xué)動力學(xué)性能

    Abstract:

    A series of MgNi-ZrB composites were prepared from MgNi alloy and ZrB alloy by a mechanical alloying (MA) method. The influences of ZrB doping on the structures and the electrochemical properties of MgNi alloy were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), charge-discharge cycles, cyclic voltammetry (CV), Tafel polarization and electrochemical impedance spectroscopy (EIS). The results demonstrate that ZrB doping obviously improves the cycle life of MgNi alloy. The MgNi-ZrB (100:5) composite made from the doped powder ball milled for 15 h exhibits the best electrochemical performances. It shows high discharge capacities of 226 and 209 mAh·g-1 after 20 and 50 cycle, respectively, which are much higher than that of MgNi alloy. Potentiodynamic polarization and EIS tests show that ZrB doping improves the anticorrosion and the electrochemical kinetic properties of MgNi alloy significantly

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王慶紅,朱俞宣,賴 超. Electrochemical Properties of MgNi-ZrB Hydrogen Storage Alloys[J].稀有金屬材料與工程,2014,43(11):2643~2646.[Wang Qinghong, Zhu Yuxuan, Lai Chao. Electrochemical Properties of MgNi-ZrB Hydrogen Storage Alloys[J]. Rare Metal Materials and Engineering,2014,43(11):2643~2646.]
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  • 收稿日期:2013-12-25
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  • 在線發(fā)布日期: 2015-04-07
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