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题名: Hydrogen desorption kinetics of amorphous Mg0.9Ti0.1Ni1-xPdx (x=0, 0.05, 0.1 and 0.15) electrode alloys
作者: Tian Qi-feng;  Zhang Yao;  Tan Zhi-cheng;  Xu Fen;  Sun Li-xian;  Yuan Hua-tang
关键词: hydrogen desorption kinetics ;  potentiostatic discharge ;  three-dimensional diffusion ;  activation energy ;  hydrogen storage alloys
刊名: TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
发表日期: 2006-08-01
卷: 16, 期:4, 页:747-752
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Metallurgy & Metallurgical Engineering
研究领域[WOS]: Metallurgy & Metallurgical Engineering
英文摘要: The amorphous Mg0.9Ti0.1Ni1-xPdx (x = 0, 0.05, 0.1, 0.15) hydrogen storage alloys were prepared by mechanical alloying. The hydrogen desorption kinetics of the electrode alloys were studied by potentiostatic discharge experiments and linear polarization measurements. The experimental results show that the three-dimensional diffusion model dominates the hydrogen desorption process of the electrode alloys. The rate constants of hydrogen desorption reaction, which are obtained from a linear fitting of the model equation, increase with temperature. The activation energies of hydrogen desorption were calculated according to the Arrhenius equation. The calculated values were 46.2, 24.29, 33.4 and 34.95 kJ/mol for x = 0, 0.05, 0.1 and 0.15 of Mg0.9Ti0.1Ni1-xPdx (x = 0, 0.05, 0.1, 0.15) electrode alloys, respectively The exchange current densities were determined by the linear polarization experiments. The variation of exchange current densities with Pd content in the alloy electrodes agrees with that of activation energies with Pd content.
关键词[WOS]: DEHYDRIDING KINETICS ;  ELECTROCHEMICAL PROPERTIES ;  STORAGE ALLOYS ;  HYDRIDE ;  MG ;  TI ;  PD ;  TERNARY ;  BATTERIES
语种: 英语
WOS记录号: WOS:000240509600001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140175
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, 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

Recommended Citation:
Tian Qi-feng,Zhang Yao,Tan Zhi-cheng,et al. Hydrogen desorption kinetics of amorphous Mg0.9Ti0.1Ni1-xPdx (x=0, 0.05, 0.1 and 0.15) electrode alloys[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2006,16(4):747-752.
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