Abstract The preparation of electrode materials with superior electrochemical performance and excellent mechanical properties are essential for the fabrication of flexible supercapacitors. However, the compatibility of the porosity and flexibility for the electrode materials remains challenging. Herein, free-standing porous coaxial carbon nanofiber (PCCNF) membranes with large specific surface area (648 m2 g−1) and suitable pore size distribution were fabricated by a facile coaxial electrospinning technique and template method. PCCNF possesses superb capacitance of 261 and 48 F g−1 (1 A g−1) in three-electrode and two-electrode system, respectively, result in remarkable energy density (48.6 ± 3 Wh kg−1) and power density (67.5 ± 1 Wh kg−1). Moreover, supercapacitor devices based on PCCNF show superb flexibility as well as excellent electrochemical and mechanical stability. PCCNF-based high performance supercapacitors may be suitable for flexible electronic energy storage devices.

中文翻译：

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用于柔性超级电容器的同轴电纺自支撑和机械稳定分级多孔碳纳米纤维膜

摘要 制备具有优异电化学性能和优异机械性能的电极材料对于柔性超级电容器的制备至关重要。然而，电极材料的孔隙率和柔韧性的兼容性仍然具有挑战性。在此，通过简便的同轴静电纺丝技术和模板法制备了具有大比表面积（648 m2 g-1）和合适孔径分布的自支撑多孔同轴碳纳米纤维（PCCNF）膜。PCCNF 在三电极和两电极系统中分别具有 261 和 48 F g-1 (1 A g-1) 的极好电容，导致显着的能量密度 (48.6 ± 3 Wh kg-1) 和功率密度 (67.5 ± 1 Wh kg−1)。而且，基于 PCCNF 的超级电容器装置显示出极好的柔韧性以及优异的电化学和机械稳定性。基于 PCCNF 的高性能超级电容器可能适用于柔性电子储能设备。