Effect of Annealing Treatment on Structure and Electrochemical Properties of New Mg-free Y0.7La0.3Ni3.25Al0.1Mn0.15 Hydrogen Storage Alloys | |
Deng, Anqiang1,3,4; Luo, Yongchun1,4; Xia, Yuanhua2; Peng, Sihui4; Ma, Weiqin4; Zhao, Xudong4; Yang, Yang4; Hou, Xiaodong4 | |
刊名 | Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities |
2020-01-10 | |
卷号 | 41期号:1页码:145-154 |
关键词 | Aluminum alloys Aluminum metallography Annealing Binary alloys Calcium alloys Cerium alloys Cobalt alloys Cobalt metallography Copper alloys Copper metallography Electric discharges Electrochemical electrodes Electrochemical properties Energy dispersive spectroscopy Gadolinium alloys Hydrogen storage Hydrogen storage alloys Lanthanum alloys Magnesium alloys Magnesium metallography Manganese alloys Manganese metallography Neutron diffraction Plutonium alloys Scanning electron microscopy Structural properties Structure (composition) Yttrium metallography Annealing temperatures Annealing treatments Discharge capacities Effect of annealing Electrochemical capacities Electrochemical cycle stabilities Electrochemical test Structure and properties |
ISSN号 | 02510790 |
DOI | 10.7503/cjcu20190430 |
英文摘要 | Mg-free A2B7 type Y0.7La0.3Ni3.25Al0.1Mn0.15 alloy of La-Y-Ni system was prepared by arc melting and annealed for 24 h in high purity Ar atmosphere at 800-1050. X-ray diffraction(XRD), neutron diffraction(ND), scanning electron microscopy and energy dispersive spectroscopy(SEM/EDS) and electrochemical test methods were used to research the influence of annealing temperature on the structure and properties of the alloys. Structural analysis shows that as-cast alloy consists of CaCu5, Ce5Co19, Gd2Co7 and Ce2Ni7. As the annealing temperature increases, CaCu5, Ce5Co19 and Gd2Co7 gradually decrease to disappear, while the phase abundance of Ce2Ni7 main phase increases gradually. When annealing at 900-950, the alloy is single-phase Ce2Ni7 structure. When annealing temperature continues to rise, a small amount of PuNi3 phase appears in the alloy. The maximum discharge capacity of the alloy electrodes increases first and then decreases as the annealing temperature increases. It increases from 307.6 mA•h/g for the as-cast alloy to 393.1 mA•h/g at the nnealing temperature of 900, and then decreases to 366.4 mA•h/g at the nnealing temperature of 1050. The electrochemical cycle stability of alloy electrodes increase with the increase of annealing temperature. After 100 cycles, the electrochemical capacity retention rate(S100) increases from 66% for the as-cast alloys to 88.5% at the nnealing temperature of 1050. When annealing at 900-950, the alloy electrodes have better comprehensive electrochemical properties. © 2020, Higher Education Press. All right reserved. |
WOS研究方向 | Chemistry |
语种 | 中文 |
出版者 | Higher Education Press Limited Company |
WOS记录号 | WOS:000525759100019 |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/115729] |
专题 | 材料科学与工程学院 党委教师工作部(人事处、教师发展中心) |
作者单位 | 1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang; 621999, China 3.School of Mechanical Engineering, Ningxia University, Yinchuan; 750021, China; 4.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; |
推荐引用方式 GB/T 7714 | Deng, Anqiang,Luo, Yongchun,Xia, Yuanhua,et al. Effect of Annealing Treatment on Structure and Electrochemical Properties of New Mg-free Y0.7La0.3Ni3.25Al0.1Mn0.15 Hydrogen Storage Alloys[J]. Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities,2020,41(1):145-154. |
APA | Deng, Anqiang.,Luo, Yongchun.,Xia, Yuanhua.,Peng, Sihui.,Ma, Weiqin.,...&Hou, Xiaodong.(2020).Effect of Annealing Treatment on Structure and Electrochemical Properties of New Mg-free Y0.7La0.3Ni3.25Al0.1Mn0.15 Hydrogen Storage Alloys.Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities,41(1),145-154. |
MLA | Deng, Anqiang,et al."Effect of Annealing Treatment on Structure and Electrochemical Properties of New Mg-free Y0.7La0.3Ni3.25Al0.1Mn0.15 Hydrogen Storage Alloys".Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities 41.1(2020):145-154. |
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