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CuxBy表面修飾對(duì)Mg50Ni50合金循環(huán)穩(wěn)定性的影響
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張家口市科學(xué)技術(shù)研究與發(fā)展計(jì)劃（061110）


Effect of Surface Modification by CuxBy on Cycle Stability of Mg50Ni50 Alloy
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    摘要:

    用機(jī)械合金化法合成了CuxBy合金和非晶態(tài)Mg50Ni50儲(chǔ)氫合金。用同樣的方法以CuxBy對(duì)非晶態(tài)Mg50Ni50合金進(jìn)行表面修飾。探索了不同組成的CuxBy合金、同一組成不同比例（質(zhì)量比，下同）的修飾對(duì)Mg50Ni50合金電極循環(huán)穩(wěn)定性的影響。結(jié)果表明：不同組成的CuxBy合金對(duì)Mg50Ni50合金的表面修飾，都不同程度地提高了Mg50Ni50合金電極的循環(huán)穩(wěn)定性。同一組成不同比例的修飾，對(duì)Mg50Ni50合金電極循環(huán)穩(wěn)定性改性效果差異較大。當(dāng)Mg50Ni50:Cu0..9B0.1=5:1時(shí)，初始放電

    Abstract:

    The CuxBy alloy and amorphous Mg50Ni50 hydrogen storage alloy were synthesized by mechanical alloying method (MA). And then surface modification of the amorphous Mg50Ni50 alloy was done using CuxBy by the same method. Effects of CuxBy with different composition and different doping ratio of CuxBy (the same composition) on the cycle stability of Mg50Ni50 alloy electrode were investigated. Results show that the surface modification through CuxBy with different composition can increase the cycle stability of Mg50Ni50 alloy electrode to different extent. However, the surface modification effects of CuxBy with the same composition but different doping ratio on the cycle stability of Mg50Ni50 alloy electrode have obvious difference. When Mg50Ni50:Cu0.9B0.1=5:1, the initial discharge capacity was 465 mAh·g-1, and the 50th one was 222 mAh·g-1. On the condition of keeping high discharge capacity, the cycle stability of amorphous Mg50Ni50 alloy was improved effectively.

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楊桂玲,李星國(guó),李 楠,韓 飛,楊曉民,謝 鐳. CuxBy表面修飾對(duì)Mg50Ni50合金循環(huán)穩(wěn)定性的影響[J].稀有金屬材料與工程,2009,38(8):1373~1377.[Yang Guiling, Li Xingguo, Li Nan, Han Fei, Yang Xiaomin, Xie Lei. Effect of Surface Modification by CuxBy on Cycle Stability of Mg50Ni50 Alloy[J]. Rare Metal Materials and Engineering,2009,38(8):1373~1377.]
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  • 收稿日期:2008-07-31
  • 最后修改日期:2009-05-25
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