Electrochemical Hydrogen Storage in Ti1.6V0.4Ni1-xCox Icosahedral Quasicrystalline Alloys

被引：24

作者：

Hu, Wen ^{[1
]}

Niu, Xiao D. ^{[1
]}

Watada, Masaharu ^{[2
]}

Kawabe, Yoshiteru ^{[2
]}

Wu, Yao M. ^{[1
]}

Wang, Li D. ^{[1
]}

Wang, Li M. ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resources Utilizat, Changchun 130022, Peoples R China

[2] GS Yuasa Corp, Minami Ku, Kyoto 6018520, Japan

来源：

CHEMPHYSCHEM | 2010年 / 11卷 / 01期

关键词：

diffusion; electrochemistry; hydrogen storage; quasicrystals; alloys; TI-ZR; METALLIC PHASE; DIFFRACTION; APPROXIMANTS; SYMMETRY; PATTERNS;

D O I：

10.1002/cphc.200900664

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The discovery of the icosahedral phase (i-phase) in rapidly quenched Ti1.6V0.4Ni1-xCox (x=0.02-01) alloys is described herein. The i-phase occurs in a similar amount relative to the coexisting beta Ti phase. The electron diffraction patterns show the distinct spot anisotropy, indicating that the i-phase is metastable. The electrochemical hydrogen storage performance of these five alloy electrodes are also reported herein. The hydrogen desorption of nonelectrochemical recombination in the cyclic voltammetric (CV) response exhibits the demand for electrocatalytic activity improvement. A discharge capacity of 261.5 mA h g-(1) was measured in a Ti1.6V0.4Ni0-96Co0.04 alloy elec-, trode at 30 mA h g(-1) and 303 K and it is shown that an appropriate e amount of Co element addition would enhance the cycling stability at the expense of high-rate discharging ability.

引用

页码：295 / 300

页数：6

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