DICP OpenIR
Structure and electrochemical properties of composite electrodes synthesized by mechanical milling Ni-free TiMn2-based alloy with La-based alloys
Chu, Hailiang; Zhang, Yao; Sun, Lixian; Qiu, Shujun; Qi, Yanni; Xu, Fen; Yuan, Huatang; Zhang Y(张耀); Sun LX(孙立贤); Zhang Y(张耀); Sun LX(孙立贤)
关键词Hydrogen Storage Alloy Electrodes Ab(2)-type Laves Phase Alloy Surface Modification Electrochemical Properties Mechanical Milling
刊名JOURNAL OF ALLOYS AND COMPOUNDS
2007-10-31
DOI10.1016/j.jallcom.2006.12.145
446页:614-619
收录类别ISTP ; SCI
文章类型Article
部门归属15
项目归属1504
产权排名1;1
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
研究领域[WOS]Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
关键词[WOS]METAL HYDRIDE ELECTRODES ; LAVES PHASE ALLOYS ; HYDROGEN STORAGE ; PERFORMANCE ; POWDER
英文摘要In the present study, hydrogen storage composite electrodes were prepared by mechanical milling the powder mixtures of Ni-free Laves phase alloy Ti0.9Zr0.2Mn1.5Cr0.3V0.3 (AB(2)) with LaNi3.8Mn0.3Al0.4Co0.5 (AB(5)) and La0.7Mg0.25Zr0.05Ni2.975Co0.525 (AB(3.5)), respectively. X-ray diffraction (XRD) measurements found that the basic phase structure (hexagonal C14) was still maintained in TiMn2-based alloy after short-time mechanical milling with additional La-based alloys. The fine particles of La-based alloy were found dispersing over the bulk particle of TiMn2-based alloy by observations of scanning electron microscopy (SEM) with energy dispersive spectrometer (EDS). The electrochemical studies showed that the additional La-based alloys greatly improved the discharge capacity of the composite electrode. The maximum discharge capacity reached 310.4 mAh/g and 314.0 mAh/g for AB(2)-10 wt.% AB(5) and AB(2)-10 wt.% AB(3.5) electrodes, respectively, which was much higher than the maximum 48.6 mAh/g of original Ti0.9Zr0.2Mn1.5Cr0.3V0.3 alloy electrode. Electrochemical impedance spectroscopy (EIS) and cyclic voltarnmetry (CV) measurements suggests that AB(3.5)-type alloy as a surface- modifier is beneficial to the decrease of the charge-transfer reaction resistance. The mechanical milling with AB(5)-type alloy was found improving the hydrogen diffusion in the bulk of the alloy from the results of anodic polarization measurement. (C) 2007 Elsevier B.V. All rights reserved.
语种英语
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WOS记录号WOS:000250822900132
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/99023
专题中国科学院大连化学物理研究所
通讯作者Zhang Y(张耀); Sun LX(孙立贤); Zhang Y(张耀); Sun LX(孙立贤)
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Nankai Univ, Inst New Energy Mat Chem, Tianjin 300071, Peoples R China
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GB/T 7714
Chu, Hailiang,Zhang, Yao,Sun, Lixian,et al. Structure and electrochemical properties of composite electrodes synthesized by mechanical milling Ni-free TiMn2-based alloy with La-based alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2007,446:614-619.
APA Chu, Hailiang.,Zhang, Yao.,Sun, Lixian.,Qiu, Shujun.,Qi, Yanni.,...&孙立贤.(2007).Structure and electrochemical properties of composite electrodes synthesized by mechanical milling Ni-free TiMn2-based alloy with La-based alloys.JOURNAL OF ALLOYS AND COMPOUNDS,446,614-619.
MLA Chu, Hailiang,et al."Structure and electrochemical properties of composite electrodes synthesized by mechanical milling Ni-free TiMn2-based alloy with La-based alloys".JOURNAL OF ALLOYS AND COMPOUNDS 446(2007):614-619.
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