A porous functional biochar (MSCs) rich in N and S heteroatom doping was prepared by pyrolyzing mantis shrimp shells as the biomass source of the typical processing seafood waste in CO₂ atmosphere. The physical and chemical properties of carbon materials were adjusted by the control of the pyrolysis temperature. In this study, maximum specific surface area (SSA) and pore volume of 484.5 m² g⁻¹ and 0.291 cm³ g⁻¹, respectively of the MSCs material were reached at 700 °C. Moreover, it was found in the characterization test that heteroatoms, such as N and S were successfully introduced into the carbon microstructure. MSC-750 contains N of up to 9.46 % and 0.52 % of S. Although its SSA is only 431.6 m² g⁻¹, the specific capacitance of the 6 M KOH symmetrical supercapacitor at 1 A g⁻¹ reaches the maximum value of 144.2 F g⁻¹ among all samples due to the pseudocapacitance generated by its high content of heteroatomic functional groups.

中文翻译：

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螳螂虾在 CO2 气氛中热解制备氮硫共掺杂和互连的分层多孔生物炭用于对称超级电容器

通过在CO ₂气氛中热解作为典型加工海鲜废物的生物质来源的螳螂虾壳，制备了富含N和S杂原子掺杂的多孔功能生物炭(MSC) 。通过控制热解温度来调节碳材料的物理和化学性质。在该研究中，MSCs 材料的最大比表面积 (SSA) 和孔体积分别为 484.5 m ²  g ^-1和 0.291 cm ³  g ^-1在 700 °C 时达到。此外，在表征测试中发现，杂原子，如 N 和 S 成功地引入到碳微结构中。MSC-750 含有高达 9.46 % 的 N 和 0.52 % 的 S。 虽然它的 SSA 只有 431.6 m²  g ^{-1 时}，6 M KOH 对称超级电容器在 1 A g ^{-1 下}的比电容在所有样品中达到最大值 144.2 F g ^-1，这是由于其高含量的杂原子官能团产生的赝电容。