High-value utilization of CO2 to synthesize sulfur-doped carbon nanofibers with excellent capacitive performance
来源期刊：International Journal of Minerals Metallurgy and Materials2020年第12期
论文作者：Meng-jun Hu Ming-zhu Yin Li-wen Hu Peng-jie Liu Shuo Wang Jian-bang Ge
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 CO2 into heteroatom-doped CNFs, with the introduction of Fe, Co, and Ni as catalysts. When the electrolyte containing Ni O, Co2O3, and Fe2O3 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.
Meng-jun Hu1，Ming-zhu Yin1，Li-wen Hu1,2，Peng-jie Liu1，Shuo Wang1，Jian-bang Ge3
1. College of Materials Science and Engineering, Chongqing University2. Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and Advanced Materials, Chongqing University3. Nuclear Engineering Program, Department of Mechanical Engineering, Virginia Polytechnic Institute and State University
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 CO2 into heteroatom-doped CNFs, with the introduction of Fe, Co, and Ni as catalysts. When the electrolyte containing Ni O, Co2O3, and Fe2O3 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.
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