Electrochemical Characteristics of LaNi_(4.5)Al_(0.5) Alloy Used as Anodic Catalyst in a Direct Borohydride Fuel Cell

查看全文 作　　者：Lianbang Wang Guobin Wu Zhenzhen Yang Yunfang Gao Xinbiao Mao Chun'an [1]Ma 机构地区：[1]State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology,College of Chemical Engineering and Materials Science,Zhejiang University of Technology,Hangzhou 310014,China 出　　处：《Journal of Materials Science & Technology》索引2011年第27卷第1期,共5页 基　　金：supported by the Zhejiang Natural Science Foundation (Nos. Y405496 and 2008C14040);the National Fundamental Research '973' Prophase Project (2007CB216409) 摘　　要：Fuel cells using borohydride as the fuel have received much attention because of high energy density and theoretical working potential.In this work,LaNi4.5Al0.5 hydrogen storage alloy used as the anodic material has been investigated.It was found that the increasing operation temperature was helpful to the open-circuit potential,the discharge potential and the power density,but showed a negative effect on the utilization of the fuel due to the accelerated hydrogen evolution.The high KOH concentration was favorable for high-rate discharge capability.The adsorption and transformation of hydrogen on LaNi4.5Al0.5 alloy electrode has been observed,but its contribution to the discharge capability during a high-rate discharge was small. 关 键 词：燃料电池 硼氢化物 贮氢合金 阳极催化剂 高倍率放电性能 电化学 高能量密度 阳极材料