硫化钴/碳纳米管的固相合成及电容特性分析综合实验设计  

Comprehensive Experimental Design Based on Synthesis of CoS_2 and CoS_2/ MWCNTs Composite and Their Capacitive Performances

作　　者：龚良玉[1,2] 蒋海燕[1] 吴锦淑[2] 翟崑[2] 杨洲[2] 孙新枝[1] 

机构地区：[1]青岛农业大学化学与药学院,山东青岛266109 [2]青岛农业大学教务处,山东青岛266109

出　　处：《实验室研究与探索》2014年第12期179-182,共4页Research and Exploration In Laboratory

基　　金：山东省精品课程建设项目(2012BK143);山东省优秀中青年科学家科研奖励基金项目(BS2010NJ007);青岛农业大学精品课程建设项目(XJPK1001);青岛农业大学网络视频课程项目(XWLSP2013009)

摘　　要：采用简单的室温固相法合成硫化钴及其与碳纳米管的复合材料,通过循环伏安和充放电测试探讨了所得材料的电容特性。结果表明,在电流密度为0.5 A/g的情况下,复合物中MWCNTs的质量分数为5%时,所得复合物的放电比容量可以达到630 F/g,远高于空白硫化钴的放电比容量(344 F/g),且1 000次后的放电比容量保持率为92%,显示了良好的电化学可逆性。该实验路线简单易行,利于分组操作和综合分析,在材料化学专业的课程实习中成功运用,充分调动了学生学习的自主性和创造性,可有效培养学生独立思考,综合应用知识的能力。Co S2 and Co S2/ MWCNTs composite were successfully synthesized via a simple solid state reaction route at room temperature. The capacitive performances of the obtained samples were further evaluated by cyclic voltammetry and constant current charge-discharge tests. The results indicated that the Co S2/ MWCNTs composite sample with the MWCNTs content of 5. 0 wt. % can deliver a high specific capacitance of 630 F / g at 0. 5 A / g,which is much larger than that（ 344 F / g） of the bare Co S2 sample. In addition,the composite can offer a specific capacitance retention of92% after 1 000 cycles,showing excellent cyclic reversibility. The designed experiment route is simple,feasible,and suitable for operating in groups to obtain information from different parts,and it is beneficial to improve students＇ ability of comprehensive analysis. It has been applied as a comprehensive experiment of the course practice of the students majored in material chemistry successfully. It is found that the experimental is helpful to improve the students＇ autonomy and creativeness to study and the capabilities of independent thinking and innovation.

关 键 词：固相合成 硫化钴/碳纳米管 电容特性 

分 类 号：TQ138.12[化学工程—无机化工]