Poly(N-phenylglycine) (PNPG), an original pseudocapacitive conjugative conducting polymer (CP), was synthesized by the electro-oxidative polymerization method. The synthesis process involves in situ polymerization and electrodeposition of N-phenylglycine onto the surface of highly conductive, few-layered, exfoliated flexible graphite sheets (E-FGSs). At first, the promising features of the conjugative structure of the as-prepared protonated PNPG were thoroughly investigated by UV–vis absorption spectrophotometry, micro-Raman spectroscopy, and X-ray photoelectron spectroscopy analysis. The protonated nitrogen groups facilitate the rapid accessibility of counter ions from the electrolyte. Electrochemical studies revealed that the PNPG/E-FGS electrode exhibits an extraordinary areal specific capacitance of 367 mF cm^–2 at 10 mV s^–1. A flexible solid-state symmetrical supercapacitor was further fabricated using PNPG/E-FGS electrodes, exhibiting a specific capacitance as high as 199 mF cm^–2 at 1 mA cm^–2 with an operating voltage of 1.1 V. Furthermore, the device delivered an excellent specific energy of 8.36 μW h cm^–2 at a power density of 1.65 mW cm^–2 in a working potential window of 1.1 V. More significantly, the energy density was nearly doubled to 16.1 μW h cm^–2 upon extending the potential window from 1.1 to 1.5 V. The extremely redox-active CP electrode is highly suitable for applications in high-energy electrochemical capacitors with wide operating potential window.

中文翻译：

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基于聚（N-苯基甘氨酸），激励能量伪电容导电聚合物和电化学剥落石墨片的柔性储能装置

聚（N-苯基甘氨酸）（PNPG），一种原始的伪电容共轭导电聚合物（CP），是通过电氧化聚合方法合成的。合成过程涉及N的原位聚合和电沉积-苯基甘氨酸涂在高导电，层数少，剥落的柔性石墨片（E-FGS）的表面上。首先，通过紫外可见吸收分光光度法，显微拉曼光谱和X射线光电子能谱分析，彻底研究了所制备的质子化PNPG的共轭结构的有希望的特征。质子化的氮基团有助于从电解质快速获得抗衡离子。电化学研究表明，PNPG / E-FGS电极在10 mV s ^–1时具有367 mF cm ^–2的非凡面积比电容。使用PNPG / E-FGS电极进一步制造了柔性固态对称超级电容器，其比电容高达199 mF cm ^–2在1mA厘米^-2 1.1 V的工作电压此外，该装置递送的8.36μW高厘米优异的比能量^-2为1.65毫瓦厘米的功率密度^-2在1.1 V的工作电位窗口更值得注意的是，将电势窗口从1.1 V扩展到1.5 V时，能量密度几乎翻了一番，达到16.1μWh cm ^–2。极具氧化还原活性的CP电极非常适合用于工作电势窗口宽的高能量电化学电容器。