摘要
利用水合肼还原十八胺(ODA)接枝的氧化石墨烯(GO),得到了十八胺功能化石墨烯(ODA-G),将ODAG与聚苯胺(PANI)通过溶液共混法,制备了功能化石墨烯和聚苯胺纳米复合材料(ODA-G/PANI).采用傅里叶变换红外(FTIR)光谱、X射线衍射(XRD)、热重分析(TGA)、拉曼(Raman)光谱及透射电镜(TEM),对复合材料的结构和形貌进行了表征;利用循环伏安、恒流充放电及交流阻抗谱等,对复合材料的电化学性能进行了测试.结果显示,少量ODA-G的引入为PANI的电化学氧化还原反应提供了更多的电子通道和活性位置,有利于提高PANI的赝电容.在电流密度1.0 A·g-1下,2%(w)ODA-G/PANI的比电容达到787 F·g-1,而相应的PANI仅有426 F·g-1.此外,ODA-G/PANI的循环稳定性也远高于纯PANI.
Octadecylamine functionalized graphene （ODA-G） was synthesized by the grafting of graphene oxide （GO） with ODA followed by reduction with hydrazine hydrate. Subsequently, ODA-G/polyaniline （PANI） composites were prepared using a facile solvent-blending procedure. ODA-G and ODA-G/PANI composites were characterized by Fourier transform infrared spectrometry （FTIR）, X-ray diffraction （XRD）, thermogravimetdc analysis （TGA）, Raman spectroscopy, and transmission electron microscopy （TEM）. The electrochemical properties of the composites were measured based on cyclic voltammetry （CV）, galvanostatic charge/discharge, and ac impedance spectroscopy. The results show that ODA-G as a support material provides additional electron transfer paths, as well as active sites, for the electrochemical redox reaction of PANI, which helps to increase its pseudocapacitance. A specific capacitance of 782 F· g^-1 is obtained for 2%（w）ODA-G/PANI at a current density of 1,0 A· g^-1, compared with 426 F · g^-1 for PANI. Furthermore, ODA-G/PANI exhibits better stability than PANI.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2014年第9期1659-1666,共8页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(51164026)
内蒙古科技大学创新基金(2012NCL007)资助项目~~
关键词
功能化石墨烯
聚苯胺
超级电容器
电化学性能
溶液混合
Functionalized graphene
Polyaniline
Supercapacitor
Electrochemical property
Solvent-blending
