The electrochemical performances of Ti-V-based hydrogen storage composite electrodes prepared by ball milling method

	The electrochemical performances of Ti-V-based hydrogen storage composite electrodes prepared by ball milling method
	Qiu, Shu-Jun 1,2; Chu, Hai-Liang 1,2; Zhang, Yao 1; Sun, Li-Xian 1; Xu, Fen 1,4; Cao, Zhong 3
刊名	international journal of hydrogen energy
	2008-12-01
卷号	33 期号:24 页码:7471-7478
关键词	Hydrogen storage alloy Ti-V-based alloy Composite Activation property Electrochemical kinetics
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.
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000262077900020
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/141185]
专题	大连化学物理研究所_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
推荐引用方式 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.