A composite of perylene diimide/reduced graphene oxide (PDI/RGO) is fabricated via a hit-and-run strategy in this work. In the hitting step, the ionic self-assembly of positively charged N,N′-bis(N-ethyl-N,N-dimethylhexan-1-aminium)perylene-3,4,9,10-tetracarboxylic diimide bromide (N⁺-PDI) and negative charged graphene oxide (GO) leads to the formation of the highly wrinkled composites (N⁺-PDI/RGOs) in solution. In the following running step to generate PDI/RGO, the composite of N⁺-PDI and solvothermally reduced GO is thermally treated at 300 °C to remove the ammonium groups in N⁺-PDI and further improve the conductivity. As the cathode in sodium ion battery (SIB), PDI/RGO delivers a specific capacity of ∼175 mA h g⁻¹ at 50 mA g⁻¹ even after 500 charge-discharge cycles and still maintains a capacity of ∼73 mA h g⁻¹ at 800 mA g⁻¹, outperforming most of the state-of-art organic SIB cathodes. More importantly, the investigation on the changes of the composites during the fabrication processes enables the understanding of the influences of the morphology, crystallinity, and compositions on their electrochemical performances in SIB, which will be helpful for the design of high performance organic electrodes in secondary batteries.

在这项工作中，通过即时运行策略制备了per二酰亚胺/还原氧化石墨烯（PDI / RGO）的复合材料。在击中步骤中，带正电荷的N，N'-双（N-乙基-N，N-二甲基己-1-胺）per-3,4,9,10-四羧酸二酰亚胺溴化物的离子自组装（N ⁺ -PDI）和带负电的氧化石墨烯（GO）导致溶液中形成高度起皱的复合材料（N ⁺ -PDI / RGOs）。在随后的生成PDI / RGO的运行步骤中，将N ⁺ -PDI和溶剂热还原的GO的复合材料在300°C的温度下进行热处理，以去除N ⁺ -PDI中的铵基并进一步提高电导率。作为钠离子电池（SIB）的阴极，PDI / RGO的比容量约为175 mA h g ^-1即使在500 mA g ^-1循环后仍保持50 mA g ^-1的电流，并且在800 mA g ^-1时仍保持约73 mA h g ^-1的容量，胜过大多数现有技术的有机SIB阴极。更重要的是，对复合材料在制造过程中的变化进行研究有助于了解形态，结晶度和组成对其在SIB中的电化学性能的影响，这将有助于设计二次电池中的高性能有机电极。电池。