ZnO/NiO:rGO nanocomposite coated Ni foam binder-free electrode (ZNR/NF) and powder sample (ZNR) were synthesized through hydrothermal technique for supercapacitor applications. The synthesized powder sample have been characterized by XRD and FT-IR analysis to identify its crystalline nature and functional groups, respectively. Raman spectra of the prepared GO and rGO samples, elucidate that the rGO possess lower structural defects than GO. The uniform distribution of ZNR sample on Ni foam substrate was illustrated by SEM analysis. Besides, the nanostructures of ZnO and NiO and its fringe patterns were confirmed by HR-TEM analysis. The high purity of the ZNR and binder-free electrodes were revealed by EDS analysis. The electrochemical properties were tested under 1 M KOH electrolyte, ZNR/NF binder-free electrode exhibited a maximum of 622.3 F g⁻¹ specific capacitance at 1 A g⁻¹. Also, it delivers a maximum power and energy density of 2460 W kg⁻¹ and 16.7 W h kg⁻¹ respectively. The fabricated binder free electrode possesses 85.7% electrochemical retention after 10,000 GCD cycles and it was the one of the key advantages for long term applications.

通过水热技术合成了用于超级电容器应用的 ZnO/NiO:rGO 纳米复合材料涂层泡沫镍无粘合剂电极 (ZNR/NF) 和粉末样品 (ZNR)。合成的粉末样品已通过 XRD 和 FT-IR 分析表征，以分别鉴定其结晶性质和官能团。制备的 GO 和 rGO 样品的拉曼光谱表明 rGO 具有比 GO 更低的结构缺陷。通过SEM分析说明了ZNR样品在Ni泡沫基材上的均匀分布。此外，通过 HR-TEM 分析证实了 ZnO 和 NiO 的纳米结构及其条纹图案。EDS 分析揭示了 ZNR 和无粘合剂电极的高纯度。电化学性能在 1 M KOH 电解液下测试，ZNR/NF 无粘合剂电极表现出最大 622.3 F g^-1 1 A g ^{-1 时的}比电容。此外，它提供的最大功率和能量密度分别为 2460 W kg ^-1和 16.7 W h kg ^-1。制成的无粘合剂电极在 10,000 次 GCD 循环后具有 85.7% 的电化学保持率，这是长期应用的关键优势之一。