In this work, a 3D-printed reactor was designed to enable natural graphite flakes to be used for electrochemical exfoliation to quickly obtain graphene oxide. Graphite foil as a typical raw material of electrochemical exfoliation was also exfoliated for comparison. Under the same conditions (10 V, 1 mol L^-1 ammonium sulphate solution as electrolyte), the graphene products obtained by one-step electrochemical exfoliation using natural graphite flakes based on the reactor, have a significantly higher degree of oxidation than products obtained using graphite foil (the oxygen content is increased by 50.2%). In addition, the degree of oxidation can be further increased by increasing the electrolyte concentration or reaction time. This design achieves one-step exfoliation using natural graphite flakes to obtain graphene oxide with tunable oxygen content in short time without using any strong oxidants or strong acids. The as-prepared electrochemically exfoliated graphene oxide (EGO) was used to prepare polybenzimidazole (PBI)/graphene oxide (GO) composite membranes for high-temperature polymer electrolyte membrane fuel cells (HTPEMFC). The 0.5%, 1% and 2% EGO loadings in the PBI membrane increased the peak power density by 13.8%, 24.4% and 29.2%, respectively.

在这项工作中，设计了3D打印的反应器，以使天然石墨薄片可用于电化学剥离，从而快速获得氧化石墨烯。为了比较，还剥落了作为电化学剥离的典型原材料的石墨箔。在相同条件下（10 V，1 mol L ^-1硫酸铵溶液作为电解质），使用基于反应器的天然石墨薄片通过一步电化学剥落获得的石墨烯产品，其氧化程度明显高于使用石墨箔获得的产品（氧含量增加了50.2％）。另外，可以通过增加电解质浓度或反应时间来进一步提高氧化程度。该设计使用天然石墨薄片实现了一步剥离，从而在短时间内获得了具有可调氧含量的氧化石墨烯，而无需使用任何强氧化剂或强酸。制备的电化学剥落氧化石墨烯（EGO）用于制备用于高温聚合物电解质膜燃料电池（HTPEMFC）的聚苯并咪唑（PBI）/氧化石墨烯（GO）复合膜。0.5％