原位沉淀-焙烧法制备NiO/P-CNT复合材料及其电容性质  

Preparation and electrochemical capacitance properties of NiO/P-CNT composites by in-situ precipitation-calcination method

作　　者：樊剑章[1] 崔青霞[1] 石伟[1] 周佳盼[1] 米红宇[1] 

机构地区：[1]新疆大学化学化工学院,新疆乌鲁木齐830046

出　　处：《功能材料》2013年第19期2854-2858,2863,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21063013);新疆维吾尔自治区高校科研计划资助项目(XJEDU2012I05);新疆大学博士启动基金资助项目(07020428024)

摘　　要：以聚吡咯衍生的碳纳米管作为载体,通过原位沉淀-焙烧相结合,合成了新型的氧化镍/聚吡咯衍生碳纳米管(NiO/P-CNT)复合材料。采用粉末X射线衍射、热重、能谱、扫描电镜、透射电镜、循环伏安以及恒流充放电测试对样品进行表征和分析。结果表明,须状NiO均匀地负载在聚吡咯衍生的碳管表面,构成了具有三维网络结构的复合物。基于这种特殊结构的优势,该复合物在电流密度为2A/g下的比电容为382F/g,NiO在复合物中电容贡献为441F/g,而NiO的比电容为351F/g。经过400圈充放电后,复合物的比电容保持在90%以上,而NiO的容量保持率为82.6%。因此,该复合电极材料较NiO具有更高的比电容和更好的循环特性。New NiO/P-CNT composite was synthesized by in-situ precipitation-calcination method using PPy-derived carbon nanotubes as the support. The samples were characterized and analyzed by powder X-ray diffrac- tion （XRD）, thermogravimetric analysis （TG）, energy dispersive spectrum （EDS）, scanning electron micros- copy （SEM）, transmission electron microscopy （TEM）, cyclic voltammetry and galvanostatic charge/dis- charge. The results indicated that whisker-like NiO was loaded uniformly on the PPy-derived carbon nanotube surfaces to generate a composite having three-dimensional network structure. Based on the advantages of this special structure, specific capacitances of the composite reached 382F/g at current densities of 2A/g. NiO capacity contribution in the composite was 441F/g, whereas specific capacitance of NiO was 351F/g. A capacity retention of the composite was more than 90% after 400 charge/discharge cycles, which was 7.9% higher than that of pure NiO. Therefore, this composite had higher specific capacitance and better cycle performance than pure NiO.

关 键 词：原位沉淀-焙烧法 聚吡咯衍生的碳纳米管 复合材料 比电容 

分 类 号：TM53[电气工程—电器]