Effect of boron addition on electrochemical properties of amorphous LaMg<sub>11</sub>Zr＋200%Ni alloy

LIU Zili; YAN Xinchun

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Effect of boron addition on electrochemical properties of amorphous LaMg₁₁Zr＋200%Ni alloy

更新时间：2025-12-10

- Effect of boron addition on electrochemical properties of amorphous LaMg₁₁Zr＋200%Ni alloy
- CIESC Journal Issue 10, Pages: 2656-2660(2009)
- 作者机构：
  
  南京航空航天大学材料科学与技术学院
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- Online First：05 October 2009，
  
  Published：05 October 2009
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LIU Zili, YAN Xinchun. Effect of boron addition on electrochemical properties of amorphous LaMg₁₁Zr＋200%Ni alloy[J]. CIESC Journal, 2009, (10): 2656-2660.
DOI：

LIU Zili, YAN Xinchun. Effect of boron addition on electrochemical properties of amorphous LaMg₁₁Zr＋200%Ni alloy[J]. CIESC Journal, 2009, (10): 2656-2660. DOI：

摘要

以熔炼LaMg11Zr为母体合金，采用机械合金化法制备了非晶态LaMg11Zr＋200%Ni+xB(x=0

10%)系列储氢合金，研究了B含量对合金结构和电化学性能的影响。结果表明：球磨20 h后，各合金均达到非晶态，B促进了非晶态合金的形成，提高了非晶态合金的热稳定性。合金电极均有良好的活化性能;随B含量的增加，合金电极的放电容量先增加后减少，LaMg11Zr＋200%Ni+2%B合金电极达到最大放电容量614.2 mAh.g-1，比不含B合金电极提高了67%;添加B提高了合金电极的循环稳定性，充放电30周循环后合金电极的容量保持率由44.4%(x=0)增加到70.4%(x=10%);且添加B在一定程度上改善了合金电极的高倍率放电性能。

Abstract

Using molten LaMg11Zr as the master alloy

LaMg11Zr＋200%Ni+xB(x=0

10%) amorphous alloys have been prepared by mechanical alloying (MA)

and the effect of boron addition on their structure and electrochemical properties has been investigatedThe alloys are amorphous after 20 h ballmilling

and the formation of amorphous alloys is promoted by the boron addition

and the thermal stability is also improved.All the alloys have good electrochemistry activation characteristics

the discharge capacity of the alloy electrodes varies with increasing the boron content.An alloy electrode with a composition of LaMg11Zr＋200%(mass)Ni+2%(mass)B achieves the maximum discharge capacity of 614.2 mAh.g-1

which is 67% higher than that without B addition.The cycling stability of alloy electrodes is improved with B addition

the capacity retention rate increases from 44.4%(x=0) to 70.4%(x=10%) after 30 chargedischarge cycles

and the high rate dischargeability (HRD) is also improved in some extent with B addition.

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Effect of boron addition on electrochemical properties of amorphous LaMg11Zr＋200%Ni alloy

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Effect of boron addition on electrochemical properties of amorphous LaMg₁₁Zr＋200%Ni alloy