To overcome the low energy density bottleneck of graphene‐based supercapacitors and to organically endow them with high‐power density, ultralong‐life cycles, etc., one rational strategy that couple graphene sheets with multielectron, redox‐reversible, and structurally‐stable organic compounds. Herein, a graphene‐indanthrone (IDT) donor–π–acceptor heterojunction is conceptualized for efficient and smooth 6H⁺/6e⁻ transfers from pseudocapacitive IDT molecules to electrochemical double‐layer capacitive graphene scaffolds. To construct this, water‐processable graphene oxide (GO) is employed as a graphene precursor, and to in situ exfoliate IDT industrial dyestuff, followed by a hydrothermally‐induced reduction toward GO and self‐assembly between reduced GO (rGO) donors (D) and IDT acceptors (A), affording rGO‐π‐IDT D–A heterojunctions. Electrochemical tests indicate that rGO‐π‐IDT heterojunctions deliver a gravimetric capacitance of 535.5 F g⁻¹ and an amplified volumetric capacitance of 685.4 F cm⁻³. The assembled flexible all‐solid‐state supercapacitor yields impressive volumetric energy densities of 31.3 and 25.1 W h L⁻¹, respectively, at low and high power densities of 767 and 38 554 W L⁻¹, while exhibiting an exceptional rate capability, cycling stability, and enduring mechanically‐challenging bending and distortions. The concept and methodology may open up opportunities for other two‐dimensional materials and other energy‐related devices.

中文翻译：

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高性能柔性超级电容器的石墨烯-茚满酮供体-π-受体异质结

为了克服石墨烯基超级电容器的低能量密度瓶颈并使其具有高功率密度，超长寿命周期等有机特性，一种合理的策略是将石墨烯片与多电子，氧化还原可逆且结构稳定的有机物耦合在一起。化合物。这里，石墨烯型阴丹酮（IDT）的供体- π -受体异质结是概念化为高效顺畅6H ⁺ / 6E ^-从伪电容IDT分子转移到电化学双层电容石墨烯支架。为此，采用可水处理的氧化石墨烯（GO）作为石墨烯前体，并原位剥落IDT工业染料，然后水热诱导还原成GO，并在还原GO（rGO）供体之间进行自组装（D ）和IDT受体（A），提供rGO-π-IDTD-A异质结。电化学测试表明，rGO-π-IDT异质结提供的重量电容为535.5 F g ^-1，放大后的体积电容为685.4 F cm ^-3。组装后的柔性全固态超级电容器可产生令人印象深刻的31.3和25.1 W h L ^-1的体积能量密度分别在767和38554 WL ^-1的低功率和高功率密度下，同时表现出出众的倍率能力，循环稳定性以及持久的机械挑战性弯曲和变形。该概念和方法可能会为其他二维材料和其他与能源相关的设备开辟机会。