Heteroatom doping and a porous structure are two significant factors that improve the capacitance performance of carbon‐based electrodes, but there are often one‐sided considerations between them. Herein, effective B, N co‐doping and trimodal‐porous structure from the carbonization of sustainable natural wood are obtained at the same time. The unique pore structure is coarsely tuned by a modified ZnAc₂‐assisted hypersaline route and further fine‐tuned by controlling the doping levels of boron and nitrogen. The high specific surface area of porous carbon up to 1201 m² g⁻¹ is coordinated with the trimodal foam‐like nanopores. This carbon‐based material as a supercapacitor electrode can provide not only trimodal‐porous ion transfer highways but also doping‐induced pseudocapacitance. The resulting pore and heteroatom reengineered wood‐derived carbon harvests a remarkable capacitance of 479 F g⁻¹ at 1 A g⁻¹, among the highest values in reported B, N co‐doped carbon electrodes. The aqueous symmetric supercapacitor exhibits energy density of 18.5 Wh kg⁻¹ and power density of 6.4 kW kg⁻¹, along with >90% capacitance retention, both in H₂SO₄ and Li₂SO₄ electrolyte over 10 000 cycles.

中文翻译：

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硼和氮共掺杂的三峰多孔木衍生碳，可提高电容性能

杂原子掺杂和多孔结构是改善碳基电极电容性能的两个重要因素，但它们之间通常存在单方面的考虑。在这里，从可持续天然木材的碳化中同时获得了有效的B，N共掺杂和三峰多孔结构。独特的孔结构可通过改良的ZnAc ₂辅助的超盐碱途径粗调，并通过控制硼和氮的掺杂水平进一步细调。多孔碳的高比表面积高达1201 m ²  g ^-1与三峰泡沫状纳米孔协调。这种作为超级电容器电极的碳基材料不仅可以提供三峰多孔离子转移通道，还可以提供掺杂引起的伪电容。由此产生的孔隙和杂原子再造木材衍生的碳在1 A g ^-1下收获了479 F g ^-1的显着电容，是报道的B，N共掺杂碳电极中的最高值。所述水性对称超级电容器在10000次循环的H ₂ SO ₄和Li ₂ SO ₄电解质中均表现出18.5 Wh kg ^-1的能量密度和6.4 kW kg ^-1的功率密度，以及> 90％的电容保持率。