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摘要
以六水合氯化钴(CoCl2·6H2O)为钴源、硫脲[CS(NH2)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(3D GE)/泡沫镍(3D GE/NF)两种基底上制备三维硫化钴/石墨烯/泡沫镍(3D CoS/GE/NF)和硫化钴(CoS)/泡沫镍(CoS/NF)电极。通过考察NF与3D GE/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,3D CoS/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,3D CoS/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,3D CoS/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%)。
Abstract
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%.
关键词
硫化钴
/
泡沫镍
/
三维石墨烯
/
超级电容器
Key words
cobalt sulfide
/
nickel foam
/
three-dimensional graphene
/
supercapacitor
基底对CoS电极材料电化学性能的影响研究[J].
化工新型材料, 2018, 46(4): 122-125 DOI:
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基金资助
国家自然科学基金(21364004)
