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材料工程  2017, Vol. 45 Issue (11): 72-77    DOI: 10.11868/j.issn.1001-4381.2016.000345
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
Ni-5% RExOy复合添加剂对Mg2Ni电化学储氢性能的影响
张国芳1,2, 张羊换2, 许剑轶1, 侯忠辉1
1. 内蒙古科技大学 材料与冶金学院, 内蒙古 包头 014010;
2. 内蒙古科技大学 工业技术研究院, 内蒙古 包头 014010
Effects of Ni-5%RExOy Composite Additives on Electrochemical Hydrogen Storage Performances of Mg2Ni
ZHANG Guo-fang1,2, ZHANG Yang-huan2, XU Jian-yi1, HOU Zhong-hui1
1. School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China;
2. Industrial Technology Research Institute, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
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摘要 以Ni-5% RExOy(CeO2,La2O3,Eu2O3)为复合添加剂,研究添加剂对球磨Mg2Ni合金的微观结构及电化学储氢性能的影响。结果表明:添加剂能够改变材料非晶与纳米晶结构的比例,复合材料的粒度分布均匀,但添加Ni-5% CeO2的样品存在少量团聚现象。含有添加剂的样品具有更高的最大放电容量及更好的循环稳定性;添加剂均可有效提高复合材料的充放氢动力学性能,改善材料表面电荷转移能力及电化学反应的可逆性,提高合金内部H原子的扩散速率。其中Ni-5% CeO2添加剂对提高复合材料动力学性能的催化效果最好。
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张国芳
张羊换
许剑轶
侯忠辉
关键词 稀土氧化物Mg2Ni电化学性能动力学性能    
Abstract:In order to improve the thermal conductivity of paraffin widely applied in phase change energy storage field, metal Na with high thermal conductivity, low melting point and low density was compounded to paraffin to form a new phase change energy storage material (Na/paraffin) in glove box, and the thermal conductivity, latent heat and heat storage/release characteristics of Na/paraffin were studied. The results show that thermal conductivity of 5%Na/95% paraffin composite phase change energy storage materials is improved 17.6 times compared to pure paraffin and the heat storage/release ratio of 5%Na/95%paraffin is two times of pure paraffin. After 200 cycles experiment, the phase transition temperature of 3% Na/97% paraffin composite phase change energy storage materials falls from 60.58℃ to 59.65℃. The phase transformation latent heat and thermal conductivity rate are reduced from 166.7520J·g-1 to 160.5632J·g-1 and from 2.33W·m-1·K-1 to 1.98W·m-1·K-1, respectively.
Key wordsrare earth oxide    Mg2Ni    electrochemical performance    kinetic property
收稿日期: 2016-03-24      出版日期: 2017-11-18
中图分类号:  TG139.7  
通讯作者: 张国芳(1981-),女,副教授,博士,研究方向:储氢材料,联系地址:内蒙古包头市昆区阿尔丁大街7号内蒙古科技大学材料与冶金学院(014010),E-mail:afang1001@126.com     E-mail: afang1001@126.com
引用本文:   
张国芳, 张羊换, 许剑轶, 侯忠辉. Ni-5% RExOy复合添加剂对Mg2Ni电化学储氢性能的影响[J]. 材料工程, 2017, 45(11): 72-77.
ZHANG Guo-fang, ZHANG Yang-huan, XU Jian-yi, HOU Zhong-hui. Effects of Ni-5%RExOy Composite Additives on Electrochemical Hydrogen Storage Performances of Mg2Ni. Journal of Materials Engineering, 2017, 45(11): 72-77.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.000345      或      http://jme.biam.ac.cn/CN/Y2017/V45/I11/72
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