Abstract An activated nitrogen-doped porous carbon ensemble on montmorillonite (MMT) was prepared through hydrothermal carbonization of glucose on MMT followed by carbonization with melamine and activation with KOH at high temperatures. The carbonaceous species was effectively guided to be heterogeneously deposited onto the surface of MMT and inserted into the interlayer spacing. The resulting N-doped carbon composite has a unique microstructure, large specific surface area (657 m2 g−1), high nitrogen content (5.5 at%), maximum specific capacitance of 223 F g−1 at a current density of 1 A g−1 and an outstanding rate capability (205 F g−1 retained at 3 A g−1) in a 6 M KOH aqueous electrolyte. Moreover, approximately 90% of the initial capacitance was retained after 8000 cycles at a current density of 1 A g−1, suggesting an excellent cycling stability.

中文翻译：

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用于高性能超级电容器的蒙脱石上的活性氮掺杂多孔碳集合

摘要 通过葡萄糖在蒙脱石（MMT）上的水热碳化，然后用三聚氰胺碳化和在高温下用KOH活化，制备了蒙脱石（MMT）上的活性氮掺杂多孔碳集合体。含碳物质被有效引导以异质沉积到 MMT 表面并插入层间距。所得掺氮碳复合材料具有独特的微观结构、大比表面积 (657 m2 g-1)、高氮含量 (5.5 at%)、1 A g 电流密度下的最大比电容为 223 F g-1 -1 和出色的倍率性能（205 F g-1 保持在 3 A g-1）在 6 M KOH 水性电解质中。此外，在 1 A g-1 的电流密度下，经过 8000 次循环后，大约 90% 的初始电容得以保留，