Abstract Bilayer carbon is synthesized via carbonization of furfural alcohol-wrapped melamine sponge. Such materials combine the merits of carbonized furfuryl alcohol and melamine sponge: melamine sponge-derived three dimensional N-doped carbon serves as skeleton and support to avoid the agglomeration of furfuryl alcohol; while the furfuryl alcohol coating enhances the carbon yield, avoids the nitrogen loss of melamine sponge and introduces the second carbon layer. Carbonized furfuryl alcohol-wrapped melamine sponge shows the highest specific capacitance of 184 F g−1 at the scan rate of 5 mV s−1, which is almost four times that of carbonized melamine sponge without furfuryl alcohol coating (47.3 F g−1 at 5 mV s−1). Based on the electrochemical measurements, it suggests that the nitrogen content, especially the quaternary nitrogen content and the graphitization degree of carbon are two key dominant factors in enhancing the capacitive performance after furfuryl alcohol coating.

中文翻译：

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来自糠醇包裹的三聚氰胺海绵的双层氮掺杂碳作为高性能超级电容器

摘要 通过糠醛醇包裹的三聚氰胺海绵碳化合成双层碳。此类材料结合了碳化糠醇和三聚氰胺海绵的优点：三聚氰胺海绵衍生的三维N掺杂碳作为骨架和支撑，避免了糠醇的团聚；而糠醇涂层提高了碳产率，避免了三聚氰胺海绵的氮损失并引入了第二碳层。碳化糠醇包裹的三聚氰胺海绵在5 mV s-1的扫描速率下显示出最高的比电容184 F g-1，几乎是没有糠醇涂层的碳化三聚氰胺海绵的四倍（47.3 F g-1 at 5 mV s−1)。根据电化学测量，它表明氮含量，