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 NiO, 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.

碳纳米纤维（CNF）由于其出色的物理和化学特性而被认为是有前途的材料。本文提出了一种以Fe，Co和Ni为催化剂，将CO ₂转化为杂原子掺杂的CNF的新方法。当电解质包含NiO，Co ₂ O ₃和Fe ₂ O _3时通过使用硫，可以得到各种直径的硫掺杂CNF。随着Fe催化剂的引入，获得的硫掺杂CNF显示出最小和最紧密的直径分布。所获得的掺杂硫的CNF具有较高的重量电容（通过SDG-Fe获得），在0.5 A / g的条件下可以达到348.5 F / g，优异的循环稳定性和良好的倍率性能。为了比较目的，测试了Fe和镍阴极，其中在它们的表面上的活性金属原子可以充当催化剂。在这两种情况下，掺杂硫的石墨片和掺杂硫的石墨准球是主要产品。