Influence of boron introduction on structure and electrochemical hydrogen storage properties of Ti–V-based alloys
作者： Shujun Qiu , Jianling Huang , Hailiang Chu , Yongjin Zou , Cuili Xiang
DOI: 10.1016/J.JALLCOM.2015.06.269
关键词: Chemical engineering 、 Laves phase 、 Limiting current 、 Solid solution 、 Alloy 、 Materials science 、 Hydrogen storage 、 Metallurgy 、 Hydrogen 、 Boron 、 Phase (matter)
摘要: Abstract In order to improve the properties of Ti–V-based alloys in electrochemical system, Ti 0.17 Zr 0.08 V 0.35 Cr 0.1 Ni 0.3 B x ( = 0–0.04) were prepared and their structural performances had been systematically investigated this study. XRD patterns show that they are mainly comprised a C14 Laves phase body centered cubic (BCC) solid solution phase. The introduction boron has little effect on structure, while it remarkably influences performances. cycle life each electrode made from studied alloy is obviously improved. For instance, retention after 200 charge–discharge cycles more than 90%. Furthermore, high rate dischargeability HRD ) also enhanced introduction. It found charge-transfer reaction resistance R ct , limiting current density I L, hydrogen diffusion coefficient D first decreased then increased with increase amount. Taking into consideration various factors, an optimal value = 0.01.
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