采用熔融盐法通过向秸秆材料中掺杂铁元素，将废弃秸秆转化为铁氧化物/生物碳储能材料（FeBNS）。研究了铁加入量对FeBNS储能性能的影响，并对其进行结构表征和电化学性能测试。结果表明，碳基材料中的铁氧化物主要以Fe₂O₃和Fe₃O₄的形式存在，FeBNS呈现出明显的片状结构，并且具有丰富的孔道结构。成功制备了具有双电层电容和赝电容性质的超级电容材料，在电流密度为2 A/g时，电容为212.2 F/g；电流密度为10 A/g时，电容为149.9 F/g，保留率为70.6%。

By doping iron elements into straw materials through molten salt method, spent straw is transformed into iron/biocarbon composite energy storage material (FeBNS).The effect of the addition amount of iron on the energy storage performance of FeBNS is studied, and the structure characterization and electrochemical performance of FeBNs are tested.The results indicate that the iron oxides in the carbon-based materials mainly exist in the form of Fe₂O₃ and Fe₃O₄.FeBNS presents a clear sheet structure, and has a rich pore structure.The supercapacitor material with both electric double-layer capacitors and pseudocapacitor properties has been successfully prepared.Its capacitance is 212.2 F·g^-1 at 2 A·g^-1, and 149.9 F·g^-1 at 10 A·g^-1, suggesting a retention rate of 70.6%.

杜鑫航(1997-),男,硕士生,研究方向为铁锰材料的合成及应用,2428828523@qq.com。