Annealing effects on Laves phase-related body-centered-cubic solid solution metal hydride alloys

被引：25
作者：
Young, K. [1 ]
Ouchi, T. [1 ]
Nei, J. [1 ]
Wang, L. [1 ]
机构：
[1] BASF Battery Mat Ovon, Rochester Hills, MI 48309 USA
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 654卷
关键词：
Hydrogen absorbing alloys; Metal hydride electrode; Laves phase alloys; Body-centered-cubic alloys; Annealing; Activation; HYDROGEN-STORAGE PROPERTIES; ELECTROCHEMICAL PROPERTIES; HEAT-TREATMENT; ZR8NI19X2; X; CO; MICROSTRUCTURE; AL; SUBSTITUTION; ELECTRODE; MG;
D O I：
10.1016/j.jallcom.2015.09.010
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：
Effects of thermal annealing (between 800 and 1100 degrees C) on the structural, gaseous phase and electrochemical hydrogen storage properties of a Laves phase-related body-centered-cubic (BCC) alloy, Ti15.6Zr2.1V40.0Cr11.2Mn6.9Co1.4Ni22.5Al0.3, were studied. Only BCC, TiNi, and C14 phases appeared in the as-cast sample. Annealing at 800 and 900 degrees C increased the main hydrogen storage BCC phase abundance and reduced C14 and TiNi catalytic phases. Annealing at 1000 degrees C promoted the formation of Ti2Ni phase. A sigma-VNi phase appeared after annealing at 1100 degrees C. In addition, the annealed samples also contained Zr and TiO2 debris. Electrochemical results suggested optimized annealing conditions of 900 degrees C for 12-h to optimize the storage capacity, high-rate performance, and activation due to a favorable balance in abundance between storage phase (BCC) and catalytic phases (C14 and TiNi). (C) 2015 Elsevier B.V. All rights reserved.
引用
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页码：216 / 225
页数：10
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