Cellulose texture in biomass is a desired renewable carbon source to prepare activated carbon with abundant porous structure and high specific surface area. However, the cellulose fractionation/separation from biomass is still a challenge. Here, corncob cellulose-derived hierarchical porous carbon has been fabricated successfully via a facile mechanical fragmentation and sieving pretreatment with subsequent carbonization and activation. The microstructural analyses show that the morphologies and textures of the corncob-derived carbon are highly depended on the corncob basic components such as cellulose, hemicellulose and lignin. Among the corncob-derived carbons, the corncob cellulose-derived hierarchical porous carbon (CPA-35-150) exhibits the largest specific surface area (1940.6 m² g⁻¹) and decent pore size distribution. Consequently, the high specific capacitance of 208.5 F g⁻¹ at 1 A g⁻¹ and outstanding rate capability are realized. Also, CPA-35-150 shows good cycling stability with 97.2% capacitance retention after 20,000 cycles under 10 A g⁻¹.

生物质中的纤维素质地是制备具有丰富的多孔结构和高比表面积的活性炭所需的可再生碳源。然而，纤维素从生物质中的分离/分离仍然是一个挑战。在这里，玉米芯纤维素衍生的分级多孔碳已经通过简便的机械破碎和筛分预处理以及随后的碳化和活化而成功制备。微观结构分析表明，玉米芯衍生的碳的形态和质地高度依赖于玉米芯的基本成分，例如纤维素，半纤维素和木质素。在来自玉米芯的碳中，来自玉米芯纤维素的分级多孔碳（CPA-35-150）表现出最大的比表面积（1940.6 m ²  g ^-1）和合适的孔径分布。因此，实现了在1 A g ^-1下具有208.5 F g ^-1的高比电容和出色的倍率能力。同样，CPA-35-150在10 A g ^-1下20,000次循环后显示出良好的循环稳定性和97.2％的电容保持率。