CoS纳米材料的制备与电化学性能  

Preparation and Electrochemical Performances of Nanomaterial CoS

作　　者：陈家辉[1] 李宇东[1] 张晓东[1] 李博文[1] 徐维[1] 

机构地区：[1]五邑大学应用物理与材料学院,广东江门529020

出　　处：《五邑大学学报（自然科学版）》2016年第4期16-20,33,共6页Journal of Wuyi University(Natural Science Edition)

摘　　要：采用简单的两步水热法在柔性碳纤维布上合成Co S纳米材料,通过扫描电镜、X射线衍射等对制品进行形貌及成分表征.采用三电极体系对纳米Co S电极材料进行电化学性能测试,结果表明,在22 m A cm??的电流密度下,其面积电容达到21.98 F cm??,而压降只有-0.018 V,10 000次循环充放电之后其电容保持率为85.7%,证明纳米Co S材料具有较大的电容量、良好的氧化还原可逆性和电化学稳定性,可作为非对称超级电容器的负电极材料.Nanomaterial cobalt sulfide （COS） was fabricated on a carbon cloth substrate by the two-step hydrothermal method. The composition and morphology of the material were characterized by Scanning Electron Microscope （SEM） and X-ray diffraction （XRD）. The electrochemical measurements were performed in a three-electrode system. The results show that CoS nanomaterial achieved an areal capacitance of 1.98F.cm-2 at 2mA.cm-2 in a 5mol.L-1LiCl solution, while the IR drop is only -0.018V. Moreover, the CoS nanomaterial has an long-term cycling stability with more than 85.7% capacitance retention after 10 000 cycles, confirming its larger capacitance, good redox activity and electrochemical stability, so it could be an excellent cathode material for asymmetric supercapacitors.

关 键 词：非对称超级电容器 负电极材料 CoS纳米材料 电化学性能 

分 类 号：TM924.1[电气工程—电力电子与电力传动] O657.1[理学—分析化学]