黄红霞,于文婉,王成.Ni-B-C对La0.94Mg0.06Ni3.49Co0.73Mn0.12Al0.20储氢合金电化学性能的影响研究[J].稀有金属材料与工程,2019,48(4):1325~1329.[Huang Hongxia,Yu Wenwan,Wang Cheng.Effect of Ni-B-C on Electrochemical Properties of La0.94Mg0.06Ni3.49Co0.73Mn0.12Al0.20 Hydrogen Storage Alloy[J].Rare Metal Materials and Engineering,2019,48(4):1325~1329.]
Ni-B-C对La0.94Mg0.06Ni3.49Co0.73Mn0.12Al0.20储氢合金电化学性能的影响研究
投稿时间:2017-09-25  修订日期:2017-10-30
中文关键词:  Ni-B-C  储氢合金  电化学性能
基金项目:广西自然科学基金(2016GXNSFAA380201),广西电磁化学功能物质重点实验室研究基金 (EMFM20161103)
中文摘要:
      为提高新型AB3型储氢合金La0.94Mg0.06Ni3.49Co0.73Mn0.12Al0.20的电化学性能,将球磨法制备的Ni-B-C粉末按不同重量比添加到合金中。采用X-射线粉末衍射仪(XRD)和扫描电子显微镜(SEM)分析合金的相结构和表面形貌,添加Ni-B-C粉末后,合金相结构没有变化,仍由LaNi5相和La2Ni7相两个相组成,但合金表面出现了细小颗粒。添加Ni-B-C粉末后,合金电极的最大放电容量和放电容量保持率均提高。当添加重量百分比为10%的Ni-B-C粉末后,电极的最大放电容量从346 mAh/g增加到363 mAh/g,50个循环后的放电容量保持率从70%提高到77%,交换电流密度I0与极限电流密度IL分别为106 mA/g和987 mA/g。动电位极化测试表明,电极的抗腐蚀能力也有所增强。研究结果表明,Ni-B-C可以提高AB3型储氢合金的综合电化学性能。
Effect of Ni-B-C on Electrochemical Properties of La0.94Mg0.06Ni3.49Co0.73Mn0.12Al0.20 Hydrogen Storage Alloy
英文关键词:Ni-B-C  hydrogen storage alloy  electrochemical properties
英文摘要:
      Ni-B-C powder prepared by ball milling was introduced to improve the electrochemical properties of new AB3-type hydrogen storage alloy La0.94Mg0.06Ni3.49Co0.73Mn0.12Al0.20. X-ray diffraction(XRD) and scanning electron microscope(SEM) were adopted to investigate the phase structure and Surface morphology of the alloy. It suggests that the alloy remains the original LaNi5 and La2Ni7 phases and some little particles appear on the surface of alloy. The addition of Ni-B-C improves the maximum discharge capacity and capacity retention rate. After adding a mass fraction of 10% Ni-B-C, the maximum discharge capacity increased from 346 mAh/g to 363 mAh/g, and the capacity retention rate after 50 cycles increases from 70% to 77%. The exchange current density I0 and the limiting current density IL reach 106 mA/g and 987 mA/g, respectively. Potentiodynamic polarization indicates the corrosion resistance of the electrodes is enhanced. The results show that the Ni-B-C powder can improve the comprehensive electrochemical properties of the hydrogen storage alloy.
作者单位E-mail
黄红霞 桂林理工大学广西电磁化学功能物质重点实验室 hhxhunan@126.com 
于文婉 桂林理工大学广西电磁化学功能物质重点实验室  
王成 桂林理工大学广西电磁化学功能物质重点实验室  
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