载钌空心碳微球复合材料的制备及电容性能

Preparation and Capacitance Properties of Ru/HCMSs Composites

将脱油沥青为碳源制备的气相生长碳微球(SCMSs)高温氧化,得到空心碳微球(HCMSs),经SnCl2溶液敏化处理和RuCl3溶液化学镀后制备了钌纳米颗粒/空心碳微球(Ru/HCMSs)复合材料.通过选择不同浓度的RuCl3,研究了化学镀液对Ru/HCMSs复合材料形貌的影响.采用场发射扫描电子显微镜,高分辨透射电子显微镜,X射线能谱和热重分析仪对产物的形貌和结构进行了表征,使用氮吸附测试HCMSs的比表面积,并通过循环伏安法对样品的电容性能进行了分析.结果表明:当RuCl3浓度为5mmol/L时,平均粒径约15nm的Ru纳米颗粒均匀地负载在HCMSs表面;HCMSs与SCMSs相比具有较大的比表面积,负载Ru后的复合物具有良好的电容性能.

The hollow carbon microspheres(HCMSs) were obtained by air-oxidization using solid carbon microspheres(SCMSs) which were prepared by chemical vapor deposition with de-oiled asphalt as carbon source.The HCMSs were sensitized in SnCl2 solution,then Ru nanoparticles were deposited on the surfaces of activated HCMSs by electroless plating.By choosing a different concentration of RuCl3,the effect of chemical plating solution on Ru/HCMSs composites was discussed.The morphology and structure of the samples were characterized by FESEM,ERTEM,EDS and TG.The specific surface area of HCMSs was measured by N2 adsorption,and electrochemical properties of the composites were measured by cyclic voltammetry.The results show that Ru nanoparticles with the diameter of 15 nm are homogeneously loaded on the surfaces of HCMSs by 5 mmol/L of RuCl3 when other parameters are the same,the HCMSs get higher specific surface area comparing with SCMSs,and Ru/HCMSs has good capacitivity,which indicate the promising application in capacitance.