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-de-rived 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 ca-pacity 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.
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