SnO_2/MWCNTs纳米复合材料的低热固相制备及其超电容特性研究  

Preparation and Supercapacitive Properties of SnO_2/MWCNTs Nanocomposite by Low-Heating Solid State Reaction

作　　者：申来法[1] 张校刚[1] 原长洲[1] 傅清宾[1] 张海军[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《无机化学学报》2009年第9期1601-1606,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家重点基础研究发展计划"973"(No.2007CB209703);国家自然科学基金(No.20633040;20873064)资助项目

摘　　要：采用十二烷基三甲基溴化铵(DTAB)辅助固相法制备SnO2/MWCNTs纳米复合材料,X射线衍射(XRD)、透射电镜(TEM)测试表明,SnO2纳米颗粒均匀包裹在MWCNTs表面。循环伏安和恒流充放电测试表明,与SnO2颗粒和纯MWCNTs相比,SnO2/MWCNTs纳米复合材料在1.0mol·L-1Na2SO4电解液中的电化学电容性质得到明显改善。当SnO2质量分数为11%时,在电流密度0.2A·g-1下,SnO2的电容值最大可达217.3F·g-1。Tin dioxide-multiwalled carbon nanotubes composite （SnO2/MWCNTs） has been synthesized by using low-heating solid-state reaction with dodecyhrimethylammonium bromide （DTAB） as surfactant. The structure and morphology of the obtained samples were characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM）. The results showed that SnO2 nanodots could symmetrically grow on the surface of the MWCNTs. Electrochemical performance of these electrodes has been investigated using cyclic voltammetry, galvanostatic charge-discharge. Compared with bare SnO2 nanodots and purity MWCNTs, SnO2 nanodots uniformly dispersed on MWCNTs lead to a significantly improved capacitive performance in 1.0 mol·L^-1 Na2SO4. Galvanostatic chargedischarge studies show that SnO2 has a maximum specific capacitance of 217.3 F ·g^-1 at 0.2 A ·g^-1 with 11wt% loading.

关 键 词：SNO2 碳纳米管 超级电容器 低热固相反应 

分 类 号：O614.432[理学—无机化学] O613.71[理学—化学]