The waste shells of crustaceans such as shrimp and crab are valuable raw materials for the preparation of heterogeneous element self-doped porous carbon. Herein, a carapace-based in-situ N/O co-doped hierarchical porous carbon (HPC) for supercapacitor electrode material was prepared by a simple CO₂ activation method. Benefiting from the extraordinary microstructure and chemical composition of shrimp carapace, the unique “oversized-threaded pore-macropore-mesopore-micropore” HPC exhibited ideal electrochemical performance in a 6 mol/L KOH electrolyte solution, with higher energy density of 10.32 Wh/kg and power density of 5.05 kW/kg, respectively, making it a promising electrode material for supercapacitors. Furthermore, in order to make clear the formation mechanism of threaded hole HPC, the raw materials of the carapace were treated by decalcification and deproteinization, respectively. The results show that the natural stud-like calcium carbonate array with a unique triangular distribution in the shrimp carapace plays an important role as an in-situ template in the formation of hierarchical porous carbon, which offers the as-prepared porous carbon material with unique structure and excellent properties. This strategy provides the effective use of wasted biomass resources for energy storage systems.

虾、蟹等甲壳类动物的废壳是制备异质元素自掺杂多孔碳的宝贵原料。_{本文通过简单的CO 2}制备了用于超级电容器电极材料的基于甲壳的原位N / O共掺杂分级多孔碳（HPC）。激活方法。得益于虾壳非凡的微观结构和化学成分，独特的“超大螺纹孔-大孔-中孔-微孔”HPC在6 mol/L KOH电解液中表现出理想的电化学性能，能量密度高达10.32 Wh/kg和功率密度分别为 5.05 kW/kg，使其成为有前途的超级电容器电极材料。此外，为了弄清螺纹孔HPC的形成机理，对甲壳原料分别进行了脱钙和脱蛋白处理。结果表明，虾壳中具有独特三角形分布的天然螺柱状碳酸钙阵列作为原位模板在分级多孔碳的形成中发挥了重要作用，它提供了所制备的具有独特结构和优异性能的多孔碳材料。该策略为能源存储系统提供了浪费的生物质资源的有效利用。