球磨方法对氧还原催化剂性能的影响  

The effects of ball milling method on the performance of oxygen reducing catalyst

作　　者：李萍[1] 李升宪[1] 胡晓宏[1] 王会勤[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《电池》2006年第3期187-188,共2页Battery Bimonthly

摘　　要：采用滚动球磨、行星式球磨和摇摆振动球磨等方法,制备了碳载二氧化锰氧还原催化剂,并组装了锌空电池。用扫描电镜(SEM)对催化剂和催化膜形貌进行了表征,以恒流法检测了空气电极的极化行为和锌空电池在室温下的放电性能。采用摇摆振动球磨方法制备的碳载二氧化锰催化剂具有优良的氧还原催化性能,当电位为1.1 V(vs.Zn)时,空气电极电流密度达到226 mA/cm2;终止电压为1.0 V时,锌空电池比能量可达427 Wh/kg。The MnO2 oxygen reducing catalyst carried carbon was prepared by ball milling, planetary ball milling and rocking vibratory ball milling methods. The Zn-air battery was assembled. The scan electron microscope （SEM） was used to cbaraeterize the morphology of the catalyst and catalytic membrane. The polarization behaviour of air electrode and the discharge performance of the Zn-air battery at room temperature were measured with constant current method. The MnO2 catalyst carried carbon made by rocking vibratory ball milling method had good catalytic performance for oxygen reduction. A current density of 226 mA/cm^2 was obtained on air electrode when the potential was 1.1 V（ vs. Zn）. The specific energy of Zn-air battery reached 427 Wh/kg at cut off voltage of 1.0 V.

关 键 词：锌空电池 催化剂 空气电极 

分 类 号：TM911.41[电气工程—电力电子与电力传动]