We report on synthesis of highly crystalline polythiophene and its application in supercapacitor electrodes. The material exhibits a remarkably stable electrochemical behavior and an excellent device performance. The device delivers an electrode specific capacitance (C) of 129.13F g, Cell C of 32.28F g at 0.5 A/g; energy, and power densities of ∼ 3 Wh kg and 250 W kg , respectively at 0.5 A/g. Also, it exhibits an excellent retention of Cell C and coulombic efficiency up to ∼ 95 % over 10,000 continuous galvanostatic charge discharge (GCD) cycles indicating a remarkable performance by a standalone, pristine and undoped polythiophene. Electrochemical impedance spectroscopy (EIS) studies further suggest material’s stable capacitive behavior. The material’s enhanced electrochemical properties, stable behavior and outstanding performance in device application are attributed to the crystalline phases present in the polymer matrix achievable via a slow rate of synthesis; overall, an edge over other conventional synthesis methods.

中文翻译：

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原位工程高结晶聚噻吩增强电化学电容器-I：合成、表征和电化学电荷存储

我们报道了高结晶聚噻吩的合成及其在超级电容器电极中的应用。该材料表现出非常稳定的电化学行为和优异的器件性能。该器件在 0.5 A/g 电流下的电极比电容 (C) 为 129.13F g，电池 C 为 32.28F g； 0.5 A/g 时的能量和功率密度分别为 3 Wh kg 和 250 W kg。此外，在 10,000 次连续恒电流充电放电 (GCD) 循环中，它表现出出色的电池 C 保留率和高达 95% 的库伦效率，表明独立、原始且未掺杂的聚噻吩具有卓越的性能。电化学阻抗谱（EIS）研究进一步表明材料具有稳定的电容行为。该材料在器件应用中增强的电化学性能、稳定的行为和出色的性能归因于聚合物基体中存在的结晶相，可通过缓慢的合成速率实现；总体而言，与其他传统合成方法相比具有优势。