碳纳米管用作镍氢电池负极材料的充放电性能研究  

Charging/discharging Performance of Carbon Nanotubes Used as Ni-MH Battery Cathode Material

作　　者：尹建峰[1] 张国庆[1] 张海燕[1] 陈易明[1] 付小娟[1] 陈进[1] 贺春华[1] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《材料科学与工程学报》2006年第4期588-591,共4页Journal of Materials Science and Engineering

基　　金：广东省十五重大专项(2003A1070301);广东省自然科学基金(036918);广东省科技计划(2004B10301008;No.2003A1070301)资助项目

摘　　要：本文比较了碳纳米管在不同放电电流密度下以及在Ar气氛及真空条件下进行热处理后的电化学充放电性能。采用三电极体系,Ni(OH)2/NiOOH为对电极,CNTs-Ni(质量比1∶9)电极为工作电极,Hg/HgO电极为参比电极,6Mol/LKOH为电解液。试验结果显示,在同样的制作条件和同样的放电条件下,采用Ar气氛1000℃热处理的碳纳米管的电化学充放电性能最好,放电量最大为541.2mAh/g,相应的放电平台为1.1V,最大放电量是未经热处理的碳纳米管放电量的1.37倍。可见,热处理是提高碳纳米管电化学充放电性能的一个有效途径;采用不同的放电电流对碳纳米管的电化学充放电性能进行研究,发现在2000mA/g放电电流下还有300mAh/g的放电容量,结果表明碳纳米管具有较好的大电流放电性能。The paper compared the ability in discharging performance of pure carbon nanotubes（CNTs） with different discharging current and different heat treatment temperature in Ar or vacuum. Three-electrode system was introduced to test the performance. Ni（OH）2 / NiOOH was used as the counter electrode, CNTs-Ni（the mass ratio is 1：9） as the working electrode, Hg/HgO as the reference electrode and 6Mol/LKOH as electrolyte. The results show that heat treated CNTs at 1000℃ under Ar ambience has the best charging/discharging performance with a highest capacity of 541.2mAh/g and a corresponding discharging plateau voltage of 1. 1V, the capacity is 1.37 times compared with CNTs without heat treatment. This disclosed that CNTs dealt with heat treatment is an effective way of improving the charging/ discharging performance. When used different discharging current to test discharging performance, CNTs still have 300mAh/g discharging capacity with 2000mA/g discharging current, and the results show that CNTs has good discharging performance.

关 键 词：碳纳米管 电化学充放电 CNTs-Ni电极 

分 类 号：TB34[一般工业技术—材料科学与工程]