Abstract Freestanding N-doped carbon coated Fe3O4 particles nanocomposites with three dimensional (3D) carbon fibers network (NC@Fe3O4/CF) derived from bacterial cellulose (BC) was fabricated by simple hydrothermal and carbonization. This self-supporting structure, as promising electrode without current collector or conductive additive, showed high area capacitance and volume capacitance (1.36 F·cm− 2, 2300 F·cm− 3 at 3 mA·cm− 2). Simultaneous, the electrode showed good cycle life (88.5% capacitance retention over 4000 cycles) and wide potential window (− 1.2 to 0 V), possessed the property of pseudo and carbon materials. This low-cost, non-toxic and high capacity freestanding electrode is a potential candidate for supercapacitor applications.

中文翻译：

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具有源自细菌纤维素的 3D 碳纤维网络的新型独立式 N 掺杂碳涂层 Fe 3 O 4 纳米复合材料用于超级电容器应用

摘要 通过简单的水热和碳化制备了源自细菌纤维素 (BC) 的具有三维 (3D) 碳纤维网络 (NC@Fe3O4/CF) 的独立式 N 掺杂碳包覆的 Fe3O4 颗粒纳米复合材料。这种自支撑结构作为没有集流体或导电添加剂的有前途的电极，显示出高面积电容和体积电容（1.36 F·cm- 2, 2300 F·cm- 3 at 3 mA·cm- 2）。同时，该电极表现出良好的循环寿命（4000 次循环后电容保持率为 88.5%）和宽电位窗口（- 1.2 至 0 V），具有伪和碳材料的特性。这种低成本、无毒和高容量的独立电极是超级电容器应用的潜在候选者。