锂-空气电池正极用多壁纳米炭管膜  

Multiwalled carbon nanotube films for cathode of Li-air battery

作　　者：刘盾 杨宁 曹博凯 周豪慎[2] 陈永[1] 

机构地区：[1]热带生物资源教育部重点实验室,热带岛屿资源先进材料教育部重点实验室,硅锆钛资源综合开发与利用海南省重点实验室,海南大学材料与化工学院,海南海口570228 [2]日本产业技术综合研究所能源技术研究部

出　　处：《电池》2013年第6期346-348,共3页Battery Bimonthly

基　　金：国家自然科学基金(51162006;51362009);国家级大学生创新创业训练项目(201210589005)

摘　　要：采用直径为40am的多壁纳米炭管（MWCNT）膜作为正极材料，研究了锂．空气电池的充放电和循环性能。以500mA／g的电流在2．3—4．6V（vs．Li＋／Li）循环，首次放电比容量达13800mAh／g。限制充放电比容量为3000mAh／g时。采用恒流充放电，可稳定循环15次；直径600nm的碳纤维正极材料的首次放电比容量仅为2070mAh／g。MWCNT表现出更高的催化活性。The discharge-charge curve and eyeliability were investigated using muhiwalled carbon nanotube （MWCNT）films with diameters of 40 nm as cathode materials for Li-air batteries. The initial discharge capacity was up to 13 800 mAh/g at a current of 500 mA/g in 2. 3 - 4. 6 V（ vs. Li ＋/Li）. When limited the discharge capacity of 3 000 mA h/g,it lasted for 15 cycles without the capacity decay. The electrochemical performance of carbon fiber with diameters of 600 nm were investigated and the relatively low initial discharge capacity of 2 070 mA h/g was obtained under the same conditions. MWCNT exhibited the higher catalytic activity.

关 键 词：锂-空气电池 纳米炭管(CNT) 正极 过电位 

分 类 号：TM911.41[电气工程—电力电子与电力传动]