Carbon materials are widely used as anodes of supercapacitors due to the long cycling stability, but the low capacitance results in low energy density of the supercapacitor device in aqueous solution, greatly limiting the application field of the supercapacitor. Here, the spiral low-crystalline Ni(OH)2 supported on self-standing layered film structure of N-doped graphene/carbon nanotubes film (NCF) is reported. The prepared flexible film electrode of low-crystalline Ni(OH)2/NCF is functioned as cathode directly, presenting high gravimetric capacitance (GC) and areal capacitance of 2130[Formula: see text]F[Formula: see text]g[Formula: see text] (2[Formula: see text]A[Formula: see text]g[Formula: see text]) and 2.88[Formula: see text]F[Formula: see text]cm[Formula: see text] (1[Formula: see text]A[Formula: see text]g[Formula: see text]). Also, this self-standing electrode film shows ultra-long cycle life, retaining 111.4% of initial capacitance after 30 000 circles at large current densities (20[Formula: see text]A[Formula: see text]g[Formula: see text]) and almost 0% fade before 10 000 circles. Moreover, Ni(OH)2/NCF and activated polyaniline derived carbon (APDC) have been assembled into an asymmetric supercapacitor, exhibiting a high gravimetric energy density of 60[Formula: see text]Wh[Formula: see text]kg[Formula: see text] at 800[Formula: see text]W[Formula: see text]kg[Formula: see text], suggesting that the obtained electrode has a good prospect application in long cycling stability with high energy density of supercapacitor devices.

中文翻译：

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用于超级电容器的具有超长循环稳定性的自立式柔性 N 掺杂石墨烯/CNT 支持的螺旋低晶 Ni(OH)2 电极

碳材料因其长循环稳定性被广泛用作超级电容器的负极，但低电容导致超级电容器装置在水溶液中的能量密度低，极大地限制了超级电容器的应用领域。这里，螺旋形低晶 Ni(OH)2报道了N掺杂石墨烯/碳纳米管薄膜（NCF）的自支撑层状薄膜结构。制备的低晶态Ni(OH)2柔性薄膜电极2/NCF直接作为阴极，具有2130的高重力电容（GC）和面积电容[公式：见文]F[公式：见文]g[公式：见文]（2[公式：见文]A[公式：见文]g[公式：见文]）和2.88[公式：见文]F[公式：见文]cm[公式：见文]（1[公式：见文]A[公式：见文] g[公式：见正文]）。此外，这种自立式电极膜具有超长的循环寿命，在大电流密度（20[公式：见正文]A[公式：见正文]g[公式：见正文]) 并且在 10 000 圈之前几乎 0% 褪色。此外，Ni(OH)2/NCF 和活化的聚苯胺衍生碳 (APDC) 已组装成不对称超级电容器，在 800[公式：见正文]W[公式：见正文]kg[公式：见正文]，表明所得电极在长循环稳定性和高能量密度的超级电容器器件方面具有良好的应用前景。