Lianbang WANG
材料科学技术（英文）
Fuel cell using borohydride as the fuel has received much attention. AB5-type hydrogen storage alloy used as the anodic material instead of noble metals has been investigated. In order to restrain the generation of hydrogen and enhance the utilization of borohydride, Ti/Zr metal powders has been added into the parent LmNi4.78Mn0.22 (where Lm is La-richened mischmetal) alloy (LNM) by ball milling and heat treatment methods. It is found that the addition of Ti/Zr metal powders lowers the electrochemical catalytic activity of the electrodes, at the same time, restrains the generation of hydrogen and enhances the utilization of the fuel. All the results show that the hydrogen generation rate or the utilization of the fuel is directly relative to the electrochemical catalytic activity or the discharge capability of the electrodes. The utilization of the fuel increases with discharge current density. It is very important to find a balance between the discharge capability and the utilization of the fuel.
关键词:
Fuel cell
,
null
,
null
,
null
,
null
原鲜霞
,
马紫峰
,
徐乃欣
稀有金属材料与工程
将电化学噪音技术应用于AB5型贮氢合金的研究,初步探索了其放电深度与电化学噪音(EN)信号之间的关系.结果表明,贮氢合金MlNi3.75Co0.65Mn0.4Al0.2在稳定状态的电化学噪音信号比充放电刚结束时要明显得多,而且在高温下的电化学噪音信号比室温下明显得多.虽然不同放电深度的该合金电极EN信号有明显的区别,但其功率密度谱(PSD)曲线均由低频区的白噪音和高频区的闪烁噪音组成.随着放电深度的增加,PSD曲线中闪烁噪音的斜率α和噪音功率P的变化规律正好相反,α先减小后增大,P先增大后减小.
关键词:
电化学噪音
,
AB5型贮氢合金
,
放电深度
