With the increasing demand for miniaturization and portable energy storage system, it is an urgent necessary that developing high volumetric energy density supercapacitors with small volumes. Herein, an integrated self-supporting CoZnNiS@CNTs/rGO composite film electrode with the thickness of about 6 μm was designed. In the unique structure, porous CNTs/rGO film is served as conductive substrate to support the CoZn-MOFs derived vertically oriented two-dimensional CoZnNiS nanoarrays. The self-supporting film endows the electrode a high volumetric mass density of 1.28 g cm⁻³ and superior electron-ion transport channel, which displays a maximum specific capacitance of 1349.2 F g⁻¹ as well as high volumetric capacity of 1727.0 F cm⁻³ at 1 A g⁻¹. Besides, a porous film of pure carbon materials (carbon spheres integrated graphene) was designed and used as the negative electrode in supercapacitor. When assembled a hybrid supercapacitor based on the above two self-supporting electrodes, the device delivers up an ultra-high volumetric/gravimetric energy density of 65.2 W h L⁻¹ (60.4 W h kg⁻¹) at a power density of 1308 W L⁻¹ (1200 W kg⁻¹). Moreover, the asymmetric supercapacitor also displays an ultra-long lifetime with 90.6% retention after 10,000 cycles. These outstanding performances make the CoZnNiS@CNTs/rGO electrode could be a promising candidate for next-generation high volumetric/gravimetric energy density supercapacitors, especially in the limited space.

随着对小型化和便携式储能系统的日益增长的需求，迫切需要开发小体积的高体积能量密度超级电容器。在此，设计了厚度为约6μm的集成的自支撑CoZnNiS @ CNTs / rGO复合膜电极。在独特的结构中，多孔CNTs / rGO膜用作导电衬底，以支撑CoZn-MOFs衍生的垂直取向的二维CoZnNiS纳米阵列。该自支撑膜赋予了电极1.28的高体积质量密度克厘米^-3和优异的电子-离子传输信道，其中显示器的1349.2 F G的最大比电容^-1以及将1727.0˚F厘米高体积容量^{- 3}在1 A g ^-1。此外，设计了一种纯碳材料的多孔膜（碳球集成石墨烯）并将其用作超级电容器的负极。当基于上述两个自支撑电极组装混合超级电容器时，该设备在1308 WL的功率密度下可提供65.2 W h L ^-1（60.4 W h kg ^-1）的超高体积/重力能量密度^-1（1200 W千克^-1）。此外，非对称超级电容器在10,000次循环后还具有超长的使用寿命，保持90.6％的寿命。这些出色的性能使CoZnNiS @ CNTs / rGO电极成为下一代高体积/重力能量密度超级电容器的有希望的候选者，尤其是在有限的空间中。