School of Chemistry and Biochemistry, School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Institute of Technology , Atlanta, Georgia, 30332 United States.
ACS Appl Mater Interfaces. 2013 Dec 26;5(24):13432-40. doi: 10.1021/am4043454. Epub 2013 Dec 12.
We report on the optimization of the capacitive behavior of poly(3,4-ethylenedioxythiophene) (PEDOT) films as polymeric electrodes in flexible, Type I electrochemical supercapacitors (ESCs) utilizing ionic liquid (IL) and organic gel electrolytes. The device performance was assessed based on figures of merit that are critical to evaluating the practical utility of electroactive polymer ESCs. PEDOT/IL devices were found to be highly stable over hundreds of thousands of cycles and could be reversibly charged/discharged at scan rates between 500 mV/s and 2 V/s depending on the polymer loading. Furthermore, these devices exhibit leakage currents and self-discharge rates that are comparable to state of the art electrochemical double-layer ESCs. Using an IL as device electrolyte allowed an extension of the voltage window of Type I ESCs by 60%, resulting in a 2.5-fold increase in the energy density obtained. The efficacies of tjese PEDOT ESCs were assessed by using them as a power source for a high-contrast and fast-switching electrochromic device, demonstrating their applicability in small organic electronic-based devices.
我们报告了在利用离子液体 (IL) 和有机凝胶电解质的柔性 I 型电化学超级电容器 (ESC) 中，作为聚合物电极的聚(3,4-乙二氧基噻吩) (PEDOT) 薄膜的电容性能优化。该器件性能基于对评估电活性聚合物 ESC 实际应用至关重要的衡量标准进行评估。发现 PEDOT/IL 器件在数十万次循环中具有高度稳定性，并且可以根据聚合物负载在 500 mV/s 和 2 V/s 之间的扫描速率进行可逆充电/放电。此外，这些器件表现出与最先进的电化学双层 ESC 相当的泄漏电流和自放电率。使用 IL 作为器件电解质，通过将 I 型 ESC 的电压窗口扩展 60%，使获得的能量密度增加了 2.5 倍。通过使用这些 PEDOT ESC 作为高对比度和快速开关电致变色器件的电源来评估它们的功效，证明了它们在小型有机电子设备中的适用性。
