Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is a highly successful conductive polymer utilized as an electrode material in energy storage units for portable and wearable electronic devices. Nevertheless, employing PEDOT:PSS in supercapacitors (SC) in its pristine state presents challenges due to its suboptimal electrochemical performance and operational instability. To surmount these limitations, PEDOT:PSS has been integrated with carbon-based materials to form flexible electrodes, which exhibit physical and chemical stability during SC operation. We developed a streamlined fabrication process for high-performance SC electrodes composed of PEDOT:PSS and carbon quantum dots (CQDs). The CQDs were synthesized under microwave irradiation, yielding green- and red-light emissions. Through optimizing the ratios of CQDs to PEDOT:PSS, the SC electrodes were prepared using a spray-coating technique, marking a significant improvement in device performance with a high volumetric capacitance (104.10 F cm⁻³), impressive energy density (19.68 Wh cm⁻³), and excellent cyclic stability, retaining ∼85% of its original volumetric capacitance after 15,000 repeated GCD cycles. Moreover, the SCs, when utilized as a flexible substrate, demonstrated the ability to maintain up to ∼85% of their electrochemical performance even after 3,000 bending cycles (at a bending angle of 60°). These attributes render this hybrid composite an ideal candidate for a lightweight smart energy storage component in portable and wearable electronic technologies.

中文翻译：

---

基于 PEDOT：PSS 的高体积能量密度柔性超级电容器与碳量子点混合电极相结合


聚（3,4-乙烯二氧噻吩）:p酰苯乙烯磺酸盐） （PEDOT：PSS） 是一种非常成功的导电聚合物，用作便携式和可穿戴电子设备储能装置的电极材料。然而，由于其电化学性能不佳且操作不稳定，在原始状态下的超级电容器 （SC） 中使用 PEDOT：PSS 会带来挑战。为了克服这些限制，PEDOT：PSS 已与碳基材料集成以形成柔性电极，在 SC 操作期间表现出物理和化学稳定性。我们开发了一种简化的制造工艺，用于由 PEDOT：PSS 和碳量子点 （CQD） 组成的高性能 SC 电极。CQDs 是在微波照射下合成的，产生绿光和红光发射。通过优化 CQD 与 PEDOT：PSS 的比例，使用喷涂技术制备了 SC 电极，标志着器件性能的显着提高，具有高体积电容 （104.10 F ^cm-3）、令人印象深刻的能量密度 （19.68 Wh ^cm-3） 和出色的循环稳定性，在 15,000 次重复 GCD 循环后仍保持其原始体积电容的 ∼85%。此外，当 SCs 用作柔性基板时，即使在 3,000 次弯曲循环（弯曲角度为 60°）后，仍能保持高达 ∼85% 的电化学性能。这些特性使这种混合复合材料成为便携式和可穿戴电子技术中轻型智能储能组件的理想选择。