In this study, a facile one-step carbonization was developed for producing B and N co-doped carbon through waterborne polyurethane, phenolic resin, and graphene oxide composite (nWPGC) used as electrode materials in supercapacitors. Furthermore, nitrogen-enriched carbon also had repetitive urethane bond (-NHCOO) in waterborne polyurethane (nWPU). Moreover, we used the ferric chloride treatment and washing method to remove the B–N bonds. The fabricated B/N co-doped carbon had a high specific capacitance of 356.3 F g⁻¹ at 0.5 A g⁻¹ in 6 M KOH electrolyte, with the surface area, and pore volume (611 m² g⁻¹ and 0.3 cm³ g⁻¹). The assembled nWPGC-Fe-B//nWPGC-Fe-B symmetric supercapacitor exhibited an energy density of 10.35 Wh kg⁻¹ was achieved at a power density of 493.2 W kg⁻¹. On top of that, the capacitor also maintained a well rate capability and brilliant cyclic stability of 89.78% capacitance retention even after 5000 cycles.

中文翻译：

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通过WPU / PF / GO复合材料实现硼/氮共掺杂碳实现的高性能超级电容器

在这项研究中，开发了一种简单的一步碳化方法，用于通过将水基聚氨酯，酚醛树脂和氧化石墨烯复合物（nWPGC）用作超级电容器的电极材料来生产B和N共掺杂的碳。此外，富氮碳在水性聚氨酯（nWPU）中也具有重复的氨基甲酸酯键（-NHCOO）。此外，我们使用氯化铁处理和洗涤方法去除了B–N键。所制备的B / N共掺杂碳在6 M KOH电解质中在0.5 A g ^-1下具有356.3 F g ^-1的高比电容，具有表面积和孔体积（611 m ²  g ^-1和0.3 cm ³ 克^-1）。组装的nWPGC-Fe-B // nWPGC-Fe-B对称超级电容器在功率密度为493.2 W kg ^-1时实现了10.35 Wh kg ^-1的能量密度。最重要的是，即使经过5000次循环，该电容器也保持了良好的速率性能和出色的循环稳定性，电容保持率为89.78％。