Abstract In this work, nanostructured composites of Cr2O3-graphene oxide (Cr2O3/GO) with conducting polymers; polyaniline (PANI) and polypyrrole (PPy) with the shape of cauliflower were synthesized via s simple and low cost one-step chronoamperometry method. The structures and morphologies of the resulting ternary nanocomposites were characterized by using Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The electrochemical capacitive properties of the prepared nanocomposites were evaluated by using cycle voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. The as-synthesized Cr2O3/GO/PANI and Cr2O3/GO/PPy composites exhibit a highest specific capacitance of 525 and 495 F g−1 at 5 A g−1 in the three-electrode tests, respectively. Interestingly, Cr2O3/GO/PANI and Cr2O3/GO/PPy composites retain 84 and 80% of their initial capacitance values after 4000 charge-discharge cycles, suggesting good electrochemical stability of the nanocomposite electrodes. The assembled symmetric devices based on Cr2O3/GO/PANI and Cr2O3/GO/PPy composites show a high specific capacitance of 263 and 100 F g−1 at the current density of 5 A g−1, respectively.

中文翻译：

---

用于超级电容器应用的 Cr 2 O 3 /氧化石墨烯/导电聚合物的三元纳米结构

摘要 在这项工作中，Cr2O3-氧化石墨烯（Cr2O3/GO）与导电聚合物的纳米结构复合材料；通过简单且低成本的一步计时电流法合成了具有花椰菜形状的聚苯胺 (PANI) 和聚吡咯 (PPy)。通过使用傅里叶变换红外光谱、X 射线衍射、场发射扫描电子显微镜和能量色散 X 射线光谱表征所得三元纳米复合材料的结构和形貌。通过使用循环伏安法、恒电流充放电和电化学阻抗谱来评估制备的纳米复合材料的电化学电容性能。在三电极测试中，合成的 Cr2O3/GO/PANI 和 Cr2O3/GO/PPy 复合材料在 5 A g-1 下表现出最高的比电容为 525 和 495 F g-1，分别。有趣的是，Cr2O3/GO/PANI 和 Cr2O3/GO/PPy 复合材料在 4000 次充放电循环后仍保持其初始电容值的 84% 和 80%，表明纳米复合电极具有良好的电化学稳定性。基于 Cr2O3/GO/PANI 和 Cr2O3/GO/PPy 复合材料组装的对称器件在 5 A g-1 的电流密度下分别显示出 263 和 100 F g-1 的高比电容。