摘要
以六水合氯化钴(CoCl_2·6H_2O)为钴源、硫脲[CS(NH_2)_2]为硫源,采用电化学沉积法分别在泡沫镍(NF)和三维石墨烯(3DGE)/泡沫镍(3DGE/NF)两种基底上制备三维硫化钴/石墨烯/泡沫镍(3DCoS/GE/NF)和硫化钴(CoS)/泡沫镍(CoS/NF)电极。通过考察NF与3DGE/NF两种基底对电极电化学性能的影响,可知3D GE/NF基底由于具有高品质、高导电性的石墨烯,促进了电极与电解液的电荷传输,能够有效提高电极材料的比容量和循环倍率性能。在1A/g电流密度下,3DCoS/GE/NF比容量达到2320F/g,高于CoS/NF电极的比容量(1269F/g),即使在20A/g时,3DCoS/GE/NF电极比容量仍有1638F/g,且在10A/g大电流密度下经过500次循环后,3DCoS/GE/NF的比容量保持率为73.44%,远远高于CoS/NF的比容量保持率(44.69%)。
CoS materials were prepared via electrodeposition using CoCl2· 6H2O as cobalt source and CS（NH2 ）2 as sulfide source.Nickel foam （NF） and 3D graphene/nickel foam （3D GE/NF） were used as substrates, respectively. 3D CoS/GE/NF and CoS/NF electrodes were obtained. The effect of NF and 3D GE/NF substrate on the electrochemical performance of CoS was investigated.The results indicated that 3D GE/NF substrate could promote the charge transfer between electrode and electrolyte due to the existence of high-quality and high-conductivity graphene.At current density of 1A/g,the specific capacitance of 3D CoS/GE/NF was 2320F/g which was higher than that of CoS/ NF （1269F/g）.Even at current density of 20A/g,the specific capacitance was still 1638F/g.The specific capacitance of 3D CoS/GE/NF would remain as 73.44% after 500 cycles at high current density of 10A/g. This value was much higher than that of CoS/NF electrode was 44.69%.
作者
张建强
张韵
李小成
Zhang Jianqiang;Zhang Yun;Li Xiaocheng(School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050;Laboratory of Clean Energy Chemistry and Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000)
出处
《化工新型材料》
CAS
CSCD
北大核心
2018年第4期122-125,共4页
New Chemical Materials
基金
国家自然科学基金(21364004)
关键词
硫化钴
泡沫镍
三维石墨烯
超级电容器
cobalt sulfide,nickel foam,three-dimensional graphene,supercapacitor
