催化剂载体对DBFC性能的影响  

Effect of catalyst carriers on the performance of direct sodium borohydride fuel cell

作　　者：赵鹏程[1] 杨子芹[1] 谢自立[1] 刘学虎[1] 

机构地区：[1]防化研究院军用化学电源研究与发展中心,北京100191

出　　处：《电源技术》2009年第7期573-575,共3页Chinese Journal of Power Sources

摘　　要：直接硼氢燃料电池(DBFC),是一种新型的高比能便携式电源,其电池电势(1.64V)及理论比能量(9300Wh/kgNaBH4)均高于直接甲醇燃料电池。为了实现BH4-的8电子完全氧化,分别以Ketjen炭黑、Vxc-72R炭黑为载体,采用溶胶-凝胶法制备了纳米级的Au/C催化剂,并采用分层装配的方法组装了单电池,考察了催化剂载体及载体处理对电池性能的影响。结果表明,溶胶-凝胶法是制备纳米级高分散Au/C催化剂的有效方法,Ketjen炭黑载体明显优于Vxc-72R炭黑,载体经酸处理后可大大提高电池的性能。Direct sodium borohydride fuel cell （DBFC） is a new type of portable power sources. Both of its cell potential（1.64 V） and power density（9.3 Wh/g NaBH4）are higher than direct methanol fuel cell. In order to realize the electo-oxidation of BH4^- in 8 e completely, Au was used as catalyst, Ketjen carbon and Vxc-72R carbon were used as catalyst carriers with pretreatment or not. The nano-size Au/C catalysts were prepared by the method of sol-gel. Single DBFCs were assembled using Au/C catalysts as anode to research the effect of catalyst carriers on their performances. The results indicate that sol-gel is a preferable method to prepare nano-size Au/C catalysts. Ketjen carbon is a better catalyst carrier than Vxc-72R carbon and the carriers which are dealt with acid can develop the cell performance greatly.

关 键 词：硼氢化钠 燃料电池 催化剂 

分 类 号：TM911.4[电气工程—电力电子与电力传动]