以石墨烯为导电基底，通过调控多巴胺的添加顺序，成功地制备了氮掺杂石墨烯负载Fe₂O₃复合材料。扫描电镜和透射电镜表征结果表明，平均尺寸约为20 nm的Fe₂O₃均匀分布在氮掺杂石墨烯片表面。所制备的氮掺杂石墨烯负载Fe₂O₃复合材料展现了良好的锂离子存储性能，在0.1 A/g的电流密度下首次放电容量可以达到1 434 mA·h/g，并在2 A/g下循环480次依然保持初始容量的78%。

Fe₂O₃/nitrogen-doped graphene is produced through regulating the addition order of dopamine, with nitrogen-doped graphene as conductive substrate and dopamine as nitrogen source.It is verified through characterization by scanning and transmission electron microscopy that Fe₂O₃ nanoparticles with a size of around 20 nm are dispersed homogeneously on the surface of nitrogen-doped graphene.The prepared Fe₂O₃/nitrogen-doped graphene exhibits superior performance in Li storage with an initial discharge capacity reaching 1, 434 mAh·g^-1 at a current density of 0.1 A·g^-1, and shows a good cycling property with 78% capacity remained over 480 cycles at a current density of 2 A·g^-1.