The inherent low volumetric performance of two-dimensional (2D) carbon materials hinders their practical usage in portable devices. Three-dimensional (3D) carbon materials derived from sustainable biomass have been widely investigated but also suffer from the moderate volumetric performance. In this work, using biomass (jujube) as carbon precursor, robust 3D porous carbon with a high particle density of 1.06 $gc{m}^{-3}$ is synthesized through high-temperature carbonization and subsequent activation. In three-electrode system, the electrode exhibits an ultrahigh volumetric capacitance of 476 $Fc{m}^{-3}$ in 6 M KOH electrolyte, which is much higher than previously reported results. The symmetrical two-electrode supercapacitor delivers excellent rate capability (75% capacitance retention at 20 $A{g}^{-1}$) as well as superior cycle stability (91% capacitance retention after 10,000 cycles) in 1 M H₂SO₄ electrolyte. Furthermore, an energy density as high as 13 $Wh{L}^{-1}$ at a power density of 477 $W{L}^{-1}$ is demonstrated in 1 M Li₂SO₄ electrolyte. The high volumetric performance of our biomass-derived porous carbon meets the requirements of portable devices and the fabrication process can be scaled up easily to industrial levels.

二维（2D）碳材料固有的低体积性能妨碍了它们在便携式设备中的实际使用。源自可持续生物质的三维（3D）碳材料已得到广泛研究，但还具有中等的体积性能。在这项工作中，使用生物质（枣）作为碳前驱物，具有1.06的高颗粒密度的坚固的3D多孔碳$GC{米}^{-3}$通过高温碳化和随后的活化来合成。在三电极系统中，电极表现出476的超高体积电容$FC{米}^{-3}$在6 M KOH电解质中，该结果远高于先前报道的结果。对称的两电极超级电容器具有出色的倍率能力（在20°C时的电容保持率为75％$\mathrm{一个}{G}^{-\mathrm{1个}}$）以及在1 M H ₂ SO ₄电解液中具有出色的循环稳定性（10,000次循环后91％的电容保持率）。此外，能量密度高达13$\mathrm{w\; ^}H{\mathrm{大号}}^{-\mathrm{1个}}$ 功率密度为477 $\mathrm{w\; ^}{\mathrm{大号}}^{-\mathrm{1个}}$在1 M Li ₂ SO ₄电解质中得到证实。我们的生物质衍生的多孔碳具有高体积性能，可满足便携式设备的要求，并且制造工艺可以轻松扩展至工业水平。