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题名: Effect of La Partial Substitution for Zr on the Structural and Electrochemical Properties of Ti0.17Zr0.08-xLaxV0.35Cr0.1Ni0.3 (x = 0 - 0.04) Electrode Alloys (vol 34, pg 17, 2009)
作者: Qiu, Shu-Jun1;  Chu, Hai-Liang1;  Zhang, Jian1;  Zhang, Yao1;  Sun, Li-Xian1;  Xu, Fen2;  Sun, Da-Lin3;  Ouyang, Liu-Zhang4;  Zhu, Min4;  Grolier, J. -P. E.5;  Frenkel, Michael6
通讯作者: 孙立贤 ;  徐芬
关键词: Hydrogen storage alloy ;  Alloy electrode ;  Activation property ;  Electrochemical kinetics
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2009-10-01
DOI: 10.1016/j.ijhydene.2009.06.066
卷: 34, 期:20, 页:8783-8783
收录类别: SCI
文章类型: Correction
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 ;  Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: In order to elucidate the effects of metallic La addition on the performance of Ti-V-based hydrogen storage alloys as negative electrodes for nickel/metal-hydrides batteries, Ti0.17Zr0.08-xLaxV0.35Cr0.1Ni0.3 (x = 0, 0.01, 0.02, 0.03, 0.04) alloys were prepared and their structural and electrochemical properties were systematically investigated. X-ray powder diffraction (XRD) results showed that these alloys were mainly consisted of C14 Laves phase with a hexagonal structure, V-based solid solution phase with BCC structure and C15 Laves phase with a cubic structure. The electrochemical measurements indicated that the maximum discharge capacities of the alloy electrodes decreased from 337.3 mAh/g (x = 0) to 262.5 mAh/g (x = 0.04) and that the substitution of Zr with metallic La in the alloys had no obvious effect on the capacity retention rate (C-100/C-max, C-200/C-max). The high-rate dischargeability (HRD) of the alloy electrodes at the discharge current density of 800 mA/g first increased from 69.01% (x = 0) to 71.13% (x = 0.01) and then decreased to 65.35% (x = 0.04). In brief, the HRD was improved with an optimum La content in the alloy (x = 0.01). The electrochemical hydrogen kinetics of the alloy electrodes was further studied by means of electrochemical impedance spectroscopy, linear polarization, anodic polarization and potential-step measurements. The charge-transfer reaction resistance R-ct decreased for x = 0.01 with respect to x = 0 and then increased with the increase of x, while exchange current density I-o, limiting current density I-L and hydrogen diffusion coefficient D were all increased for x = 0.01 with respect to x = 0 and then decreased with the increase of x. The optimal content of La in Ti0.17Zr0.08-xLaxV0.35Cr0.1Ni0.3 alloys for negative electrodes in alkaline rechargeable secondary batteries is x = 0.01 in this study. (C) 2009 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: HYDROGEN STORAGE ALLOYS ;  METAL HYDRIDE ELECTRODES ;  ALKALINE AQUEOUS-SOLUTION ;  SOLID-SOLUTION ALLOYS ;  NETWORK STRUCTURE ;  SURFACE-TREATMENT ;  TI ;  MICROSTRUCTURE ;  PERFORMANCES ;  COMPOSITES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000271177200036
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/101829
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Liaoning Normal Univ, Coll Chem & Chem Engn, Dalian 116029, Peoples R China
3.Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China
4.S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China
5.Univ Clermont Ferrand, Lab Thermodynam Solut & Polymers, F-63177 Aubiere, France
6.Natl Inst Stand & Technol, Phys & Chem Properties Div 838, Boulder, CO 80305 USA

Recommended Citation:
Qiu, Shu-Jun,Chu, Hai-Liang,Zhang, Jian,et al. Effect of La Partial Substitution for Zr on the Structural and Electrochemical Properties of Ti0.17Zr0.08-xLaxV0.35Cr0.1Ni0.3 (x = 0 - 0.04) Electrode Alloys (vol 34, pg 17, 2009)[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2009,34(20):8783-8783.
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