The pore structure of carbon-based materials and the voltage window of the electrolyte are two key factors affecting the energy density of carbon-based supercapacitors (SCs). In this paper, activated carbon materials of different pore sizes is successfully synthesized by chemical activation method by adjusting the mass ratio of ZnCl to sucrose, and successfully applied to construct SCs based on different electrolyte systems. As the specific surface area of the prepared porous carbon materials shows a tendency to increase and then decrease, reaching a maximum in the presence of micropores. Further summarizing the constitutive relationship between pore structure-electrochemical performance in the high-concentration electrolyte system, it is found that the normalized specific capacity is larger at smaller pore sizes, and with the increase of mesoporous proportion, the normalized specific capacity decreases and tends to be stable. In addition, the different strengths of solvation of anions and cations in the electrolyte, with the cations contributing more to the contrast, and the presence of mesopores providing ion transport channels to improve the efficiency of ion transport in porous materials, which provide directions for designing a suitable pore structure for highly concentrated salt electrolytes, as well as another way of optimizing the properties of carbon-based materials for SCs.

中文翻译：

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多孔碳电极材料的孔结构控制及其在盐包水电解质中的储能性能

碳基材料的孔隙结构和电解质的电压窗口是影响碳基超级电容器（SC）能量密度的两个关键因素。本文通过调整ZnCl与蔗糖的质量比，采用化学活化法成功合成了不同孔径的活性炭材料，并成功应用于构建基于不同电解质体系的SCs。由于所制备的多孔碳材料的比表面积表现出先增大后减小的趋势，在微孔存在时达到最大值。进一步总结高浓度电解液体系中孔结构-电化学性能的本构关系发现，孔径越小，归一化比容量越大，并且随着介孔比例的增加，归一化比容量减小并趋于趋于稳定。保持稳定。此外，电解质中阴离子和阳离子的溶剂化强度不同，其中阳离子对对比度的贡献更大，介孔的存在提供了离子传输通道，提高了多孔材料中离子传输的效率，这为设计提供了方向适用于高浓度盐电解质的孔结构，以及优化SC碳基材料性能的另一种方法。