Ultrathin nickel manganese oxide nanosheets grown vertically on reduced graphene oxide (NiMn₂O₄ NSs@rGO) were successfully fabricated through a facile co-precipitation and thermal treatment process. Such a unique nanostructure can not only facilitate electron transfer and electrolyte penetration but also withstand the structural damage of the active materials in electrochemical reactions. The resulting product NiMn₂O₄ NSs@rGO was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Brunauer–Emmett–Teller (BET) analysis. When evaluated for its potential as an electrode material in supercapacitors, the as-synthesized NiMn₂O₄ NSs@rGO nanocomposite exhibits enhanced energy storage performance with high specific capacitance (1243 F g⁻¹ at 3 A g⁻¹) and prominent cycle life (80.8% capacitance retention after 5000 cycles). These results indicate that the ultrathin and perpendicular NiMn₂O₄ nanosheets with rGO substrates obtained from this green and facile route hold great prospects in high performance supercapacitor applications.

中文翻译：

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在还原的氧化石墨烯上作为超级电容器的先进电极，可 轻松合成超薄和垂直的NiMn ₂ O ₄纳米片†

通过简便的共沉淀和热处理工艺成功制备了在氧化石墨烯（NiMn ₂ O ₄ NSs @ rGO）上垂直生长的超薄镍锰氧化物纳米片。这种独特的纳米结构不仅可以促进电子转移和电解质渗透，还可以承受电化学反应中活性物质的结构破坏。所得产物NiMn ₂ O ₄NSs @ rGO的特征在于X射线衍射（XRD），场发射扫描电子显微镜（FESEM），透射电子显微镜（TEM），X射线光电子能谱（XPS）和Brunauer–Emmett–Teller（BET）分析。当其作为超级电容器的电极材料评价的潜力，合成后原样的的NiMn ₂ ö ₄与高的比电容的NS @ RGO纳米复合材料表现出增强的能量储存性能（1243 F G ^-1在3 A G ^-1）和突出的循环寿命（5000次循环后的电容保持率为80.8％）。这些结果表明超薄和垂直的NiMn ₂ O ₄ 通过这种绿色便捷的途径获得的带有rGO基底的纳米片在高性能超级电容器应用中具有广阔的前景。