摘要
采用水热合成法,以CoCl2·6 H2O为原料、尿素为沉淀剂,制备Co3O4/GONS复合体作为超级电容器的电极材料.对样品的物相结构、微观形貌和电容性能进行表征和测试.结果表明：纯Co3O4材料呈纳米纤维状;复合一定量的GO后,Co3O4呈现片状孔隙结构,由很多10～20 nm的微小颗粒相互连接构成,并且Co3O4薄片紧凑成束状分布在GO表面上.由于静电吸引及配位作用形成的GO对Co2＋离子的限域效应,确保了钴氧化物在纳米GO片上的二维可控生长.C03O4/GONS电极材料具有较好的电容性能,在0.5 Ng的电流密度下比电容能达到444 F/g,比纯Co3O4的比电容（298 F/g）提高了49％;当电流密度增加至5Ng时,比电容还能保持在262 F/g。
The C0304/GONS（graphene oxide nanosheets） composite was prepared with COCI2.6 H20 as raw material and urea as a precipitating agent via a facile hydrothermal route. The morphology, microstructure and capacitive performance of the composite were characterized. It was revealed that the prepared pure C0304 was fibrous. As for CoO4/GONS composite, C0304 which was composed by many fine interconnected nanoparticles （10-20 nm） showed the nanosheet morphology, and the C0304 nanosheets aggregate into a beam shape on the surface of GO. The formation of C0304 nanosheets could be interpreted that the confinement of Co2＋on GONS due to electrostatic and coordination interaction could ensure controlled crystal growth of 2-dimensional cobalt oxides on the surface of GO. The C030,JGONS electrode materials exhibit excellent capacitive performance. The specific capacitance reaches A.A.A. F/g at a current density of 0.5 A/g, which increases by 49% incomparison with pure C0304electrode, and still remains 262 F/g at 5 Ng.
出处
《电源技术》
CAS
CSCD
北大核心
2014年第10期1875-1878,共4页
Chinese Journal of Power Sources
基金
中央高校专项基金(DC13010207)
