• A green low-cost route without the acid washing step is used to prepare the N,O-codoped egg-box-like carbons.

• The obtained carbons possess moderate N, O contents and tuned transfer channels with three-dimensional (3D) egg-box-like structures.

• The fabricated electrode exhibits high areal capacitance and long-term cycle stability.

中文翻译：

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3D N，O掺杂的鸡蛋盒状碳素，具有用于高容量电容超级电容器的调谐通道

• 没有酸洗步骤的绿色低成本路线用于制备N，O掺杂的蛋盒状碳。

• 所获得的碳具有适度的N，O含量，并具有三维（3D）蛋盒状结构的传递通道。

• 制成的电极表现出高的面电容和长期循环稳定性。