含多壁纳米碳管复合电极的制备及其电化学储氢研究-材料学专业论文.docxVIP

摘要采用粉术压型和复合电沉积两种方法制备了镍一多蹙纳米碳管(三种外径)工作电极， 摘要 采用粉术压型和复合电沉积两种方法制备了镍一多蹙纳米碳管(三种外径)工作电极， 得到了复合电沉积制各工作电极的最佳工艺条件。在制备：I：作电极的基础上研究了纳米碳管 的电化学储氢性能，发现铜不适合做电池的集流体；外径为10 30纳米、60一lOOnm以及外径 为小于10hm的碳管最大放电容量为318．9mA．h／g、550．6mA．h／g和1361．1mA．h／g，相当丁 质量储氢量分别为1．12Wt％、1．93Wt％和4．77Wt％：透射电镜观察的结果表明，经过氧化法纯 化的碳管较为纯净，且有的端口被打丌；扫描电镜观察的结果表明，在复合电沉积制备的电 极中纳米碳管较均匀地镶嵌于基体中，并且端头露出覆盖于基体表面；拉曼光谱结果表明纳 米碳管可以进行化学储氖。碳管的长度、层数、内径大小和前处理对其储氧量影响较大。最 后展望了纳米碳管作为可充式电池负极的可能性。 关键词：纳米碳管；粉术压型：复合电沉积；储氢 AbstractNickel-MWNT(、vitll Abstract Nickel-MWNT(、vitll three different sizes in diameter)electrodes were prepared by two different procedures，powder bfiqutting and composite electrochemical deposition，respectively．The best technical conditions that electrodes were prepared by composite electrochemical deposition were acquired．The electrodes were based on the propercy of MWNT in electrochemical hydrogen storage．It is found that copper was not fit for conducting body concentrating current of the electrodes．The maximum discharge capacity of The hydrogen storage capacity in MWNT with 10-30nm，60-100rim and less than 10nm in diameter was 318．9mA·h／g、550．6mA．h／g and 1361．1mA·h／g，responding to respective estimated as 1．12Wt％．1．93Wt％and 4．77Wt％．The ransmission electron microscopy(TEM)results show that CNTs that were oxided are pure and some oftube wall are open end．The scanning electron microscopy(SEM)resuks show that CNTs in the electrodes prepared by composite electrochemical deposit method are embedded in the matrix uniformly and one side of which protrudes out of the surface．The Raman spectra results show that hydrogen may be stored in CNTs by chemisorption．The length、layers、size of inner diameter of MWNT greatly affect hydrogen storage in it．The prospect ofMWNT’S potential application for the negative electrode ofrechargeable battery was also discussed． Keywords：Carbon nanotubes；Powder briqutting；Composite electrochemical deposition； Hydrogen storage 一——一耋至壁垫鲞堡笪墨垒生丝兰堂堂鎏茎皇些兰堡墨堡茎——第一章绪 一——一耋至壁垫鲞堡笪墨垒生丝兰堂堂鎏茎皇些兰堡墨堡茎—— 第一章绪 论 1．1概