The development of advanced electrode material is crucial for promoting the application of new high-performance green energy storage devices and remains a great challenge. Herein, by introducing porous carbon (PC) or carbon nanotubes (CNTs) to further modify the redox-active 9,10-phenanthrenequinone (PQ) molecule non-covalently functionalized reduced graphene oxide (RGO), we have designed and synthesized RGO/PQ/PCs (RPPs) and RGO/PQ/CNTs-10 (RPC-10) nanocomposites using a simple one-step solvothermal method. Benefiting from the optimization of the hierarchical porous nanostructures and each composition further strengthens their respective advantages in the novel synthesized nanocomposites (RPPs and RPC-10), the RPPs and RPC-10 electrodes demonstrated significantly superior electrochemical energy storage performance over the RGO and RGO/PQ (RP) electrodes, especially for the RPP-10 electrode with a high specific capacitance of 343.5 F at 0.5 A and good rate capability (69.23 %, 0.5 − 40 A ). Furthermore, both the symmetric supercapacitor assembled with the optimal RPP-10 electrode and the hybrid supercapacitor assembled with the RPP-10 negative electrode and the NCSRC-24 positive electrode previously reported show excellent energy densities and ultra-long cycling stabilities. This result demonstrates that the synthesized novel RPP-10 nanocomposite is a highly promising candidate for new light-weight, sustainable, high-flexible and high-performance energy storage devices.

中文翻译：

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高性能超级电容器分级多孔还原氧化石墨烯/9,10-菲醌/多孔碳纳米复合材料的合理设计


先进电极材料的开发对于推动新型高性能绿色储能器件的应用至关重要，仍然是一个巨大的挑战。在此，通过引入多孔碳（PC）或碳纳米管（CNT）进一步修饰具有氧化还原活性的9,10-菲醌（PQ）分子非共价功能化的还原氧化石墨烯（RGO），我们设计并合成了RGO/PQ /PCs (RPPs) 和 RGO/PQ/CNTs-10 (RPC-10) 纳米复合材料使用简单的一步溶剂热法。受益于分级多孔纳米结构的优化，每种成分进一步增强了其在新型合成纳米复合材料（RPPs和RPC-10）中各自的优势，RPPs和RPC-10电极表现出明显优于RGO和RGO/的电化学储能性能。 PQ (RP) 电极，特别是 RPP-10 电极，在 0.5 A 电流下具有 343.5 F 的高比电容和良好的倍率性能 (69.23 %, 0.5 − 40 A )。此外，采用最佳RPP-10电极组装的对称超级电容器以及先前报道的RPP-10负极和NCSRC-24正极组装的混合超级电容器均表现出优异的能量密度和超长循环稳定性。这一结果表明，合成的新型RPP-10纳米复合材料是新型轻质、可持续、高灵活性和高性能储能装置的极有前景的候选材料。