In this study, a ternary nanocomposite of reduced graphene oxide (rGO), manganese dioxide (MnO₂), and polypyrrole (PPy) was synthesized and characterized and presented electrochemical performances of supercapacitor devices. Four types of activated and inactivated materials (rGO/MnO₂, rGO/MnO₂*, rGO/MnO₂/PPy, and rGO/MnO₂*/PPy) were investigated by Fourier transform infrared-attenuated total reflection spectroscopy (FTIR-ATR), scanning electron microscopy-energy dispersion X-ray analysis (SEM-EDX), Raman spectroscopy, Brunauer-Emmett-Teller (BET) surface analysis, thermogravimetric (TGA-DTA) analysis, cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS) analysis. Synthesis procedures are easy and low cost and have good conductivity performances compared with other methods. Activated MnO₂* and inactivated MnO₂ were used in the nanocomposite system. The highest specific capacitance was obtained as C_sp = 348.11 F/g at 0.5 mA for rGO/MnO₂* nanocomposite by GCD method. The spectroscopic, morphologic, pore size, thermogravimetric, and electrochemical differences of activated and inactivated MnO₂ materials are presented in this manuscript.

中文翻译：

---

活化和失活的rGO / MnO 2和rGO / MnO 2 / PPy纳米复合材料的合成，表征和超级电容器性能

本研究合成了还原型氧化石墨烯（rGO），二氧化锰（MnO ₂）和聚吡咯（PPy）的三元纳米复合材料，表征了超级电容器的电化学性能。四种类型的活化和失活材料（rGO / MnO ₂，rGO / MnO ₂ *，rGO / MnO ₂ / PPy和rGO / MnO ₂* / PPy）通过傅里叶变换红外衰减全反射光谱（FTIR-ATR），扫描电子显微镜-能量色散X射线分析（SEM-EDX），拉曼光谱，Brunauer-Emmett-Teller（BET）表面分析进行研究，热重（TGA-DTA）分析，循环伏安法（CV），恒电流充/放电（GCD）和电化学阻抗谱（EIS）分析。与其他方法相比，合成过程简单且成本低廉，并且具有良好的导电性能。在纳米复合材料系统中使用了活化的MnO ₂ *和失活的MnO ₂。对于rGO / MnO _2，在0.5 mA时获得最高的比电容为C _sp = 348.11 F / g*通过GCD方法的纳米复合材料。该手稿中介绍了活化和失活的MnO ₂材料的光谱，形貌，孔径，热重和电化学差异。