碳空心球/硫复合材料制备和电化学性能研究  

Preparation and Electrochemical Performance of Hollow Carbon Spheres/Sulfur Composite

作　　者：臧俊[1] 钱航[1] 曾尔曼 付娟妮 郑明森[1] 董全峰[1] 

机构地区：[1]厦门大学固体表面物理化学国家重点实验室,化学化工学院化学系,福建厦门361005 [2]厦门产业技术研究院,福建厦门361001

出　　处：《电化学》2013年第3期195-198,共4页Journal of Electrochemistry

基　　金：国家自然科学基金项目(No.200933005,No.21021002);973项目(No.2009CB220102);厦门市纯电动汽车重大专项(No.3502Z20121002)资助

摘　　要：采用PMMA为模板制备碳空心球材料,并以碳空心球材料为导电骨架与硫材料复合制得碳空心球/硫复合材料.SEM和TEM照片显示,硫材料能均匀地填充在碳空心球的孔道和腔体内部.采用恒电流充放电测试碳空心球/硫复合电极的电化学性能.结果表明,在100 mA·g-1、500 mA·g-1、1 A·g-1、2 A·g-1和5 A·g-1电流密度下,碳空心球/硫复合电极可逆放电容量分别为1145 mAh·g-1、824 mAh·g-1、702 mAh·g-1、586 mAh·g-1和395 mAh·g-1,呈现出较优异的倍率循环寿命.Hollow carbon spheres were prepared by the PMMA template.Hollow carbon spheres/sulfur composite was made from sulfur and hollow carbon spheres as a conducting framework.The results of SEM and TEM showed that sulfur was uniformly filled in both of the shell and hollow core of hollow carbon spheres.The electrochemical performance of hollow carbon spheres/sulfur composite was characterized by the charge/discharge method.The results showed the excellent rate and cycle performance of hollow carbon spheres/sulfur composite.The reversible capacities of hollow carbon spheres/sulfur composite are 1145 mAh.g-1,824 mAh.g-1,702 mAh.g-1,586 mAh.g-1and 395 mAh.g-1at the current densities of 100 mA.g-1,500 mA.g-1,1 A.g-1,2 A.g-1and 5 A.g-1,respectively.

关 键 词：碳空心球 锂硫电池 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]