摘要
Carbon nanofiber(CNF)is considered a promising material due to its excellent physical and chemical properties.This paper proposes a novel way to transform CO_(2) into heteroatom-doped CNFs,with the introduction of Fe,Co,and Ni as catalysts.When the electrolyte containing Ni O,Co2O3,and Fe_(2)O_(3) was employed,sulfur-doped CNFs in various diameters were obtained.With the introduction of Fe catalyst,the obtained sulfur-doped CNFs showed the smallest and tightest diameter distributions.The obtained sulfur-doped CNFs had high gravimetric capacitance(achieved by SDG-Fe)that could reach 348.5 F/g at 0.5 A/g,excellent cycling stability,and good rate performance.For comparison purposes,both Fe and nickel cathodes were tested,where the active metal atom at their surface could act as catalyst.In these two situations,sulfur-doped graphite sheet and sulfur-doped graphite quasi-sphere were the main products.
基金
the National Natural Science Foundation of China(No.51804056)
the Fundamental Research Funds for the Central Universities(No.2019CDXYCL0031)
the Fundamental and Frontier Research Project of Chongqing,China(No.cstc2019jcyjmsxm X0230)。
