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The electrochemical performances of Ti-V-based hydrogen storage composite electrodes prepared by ball milling method
Qiu, Shu-Jun1,2; Chu, Hai-Liang1,2; Zhang, Yao1; Sun, Li-Xian1; Xu, Fen1,4; Cao, Zhong3
关键词Hydrogen Storage Alloy Ti-v-based Alloy Composite Activation Property Electrochemical Kinetics
刊名INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
2008-12-01
DOI10.1016/j.ijhydene.2008.10.009
33期:24页:7471-7478
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Electrochemistry ; Energy & Fuels
研究领域[WOS]Chemistry ; Electrochemistry ; Energy & Fuels
关键词[WOS]METAL HYDRIDE ELECTRODES ; ALKALINE AQUEOUS-SOLUTION ; SOLID-SOLUTION ALLOYS ; NEGATIVE ELECTRODES ; CAPACITY ; LAMG2NI9 ; PHASE ; LA ; NI ; MICROSTRUCTURE
英文摘要In order to overcome the inherent disadvantages of Ti-V-based hydrogen storage alloys, such as poor activation behavior and low high-rate dischargeability, the novel composites Ti0.17Zr0.08V0.35Cr0.1Ni0.3-x wt.% La0.7Mg0.3Ni2.75Co0.75 (x = 0, 5, 10 and 20) were successfully synthesized by ball milling method in the present study. And the structure and overall electrochemical properties of as-prepared composites are investigated systemically. The electrochemical studies show that the maximum discharge capacity of the composite electrodes displays no variation with the increase of La0.7Mg0.3Ni2.75Co0.75 content, whereas the high-rate dischargeability (HRD) and the activation behavior are distinctly improved with increasing x. The electrochemical hydrogen kinetics of composite electrodes is also studied by means of electrochemical impedance spectroscopy (EIS), linear polarization (LP), anodic polarization (AP) and potential-step measurements. It is found that the charge-transfer reaction resistance R-ct is decreased with increasing the amount of La0.7Mg0.3Ni2.75Co0.75 while exchange current density I-0, limiting current density I-L and hydrogen diffusion coefficient D are all increased with increasing the amount of La0.7Mg0.3Ni2.75Co0.75. These results suggest that the formation of composite with La0.7Mg0.3Ni2.75Co0.75 alloy is a promising strategy for improving the HRD, activation behavior and electrochemical kinetics of Ti-V-based alloy electrodes. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
语种英语
WOS记录号WOS:000262077900020
引用统计
被引频次:12[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/321008/141185
专题中国科学院大连化学物理研究所
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.Changsha Univ Sci & Technol, Dept Environm Chem & Engn, Changsha 410076, Hunan, Peoples R China
4.Liaoning Normal Univ, Fac Chem & Chem Engn, Dalian 116029, Peoples R China
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GB/T 7714
Qiu, Shu-Jun,Chu, Hai-Liang,Zhang, Yao,et al. The electrochemical performances of Ti-V-based hydrogen storage composite electrodes prepared by ball milling method[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2008,33(24):7471-7478.
APA Qiu, Shu-Jun,Chu, Hai-Liang,Zhang, Yao,Sun, Li-Xian,Xu, Fen,&Cao, Zhong.(2008).The electrochemical performances of Ti-V-based hydrogen storage composite electrodes prepared by ball milling method.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,33(24),7471-7478.
MLA Qiu, Shu-Jun,et al."The electrochemical performances of Ti-V-based hydrogen storage composite electrodes prepared by ball milling method".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 33.24(2008):7471-7478.
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