Metal-organic frameworks have attracted great interest as a kind of promising electrode materials for electrochemical energy storage, due to their porous skeleton in favor of electrolyte ion diffusion for reversible redox reactions of metal ions, but usually suffer from poor conductivity and low packing density, to the disadvantage of boosting rate capability and volumetric capacitance. We report a novel flexible battery-supercapacitor hybrid (BSH) device based on the holey-reduced graphene oxide (HRGO) anode and the HRGO/Ni(picolinic acid)₂ (Ni(PA)₂) cathode. The HRGO obtained by etching RGO with nitric acid through hydrothermal process, exhibits abundant micropores in favor of fast electrolyte ion diffusion. The ultra-thin stratiform HRGO/Ni(PA)₂ paper prepared through the adsorption of Ni²⁺ complex on HRGO and the hydrothermal process of HRGO/Ni²⁺ complex, can provide gravimetric and volumetric capacitances of 738 F g^-1 at 1 A g^-1 and 747 F cm^-3 at 1 A cm^-3. The assembled flexible BSH device can deliver the volumetric capacitance of 67.1 F cm^-3 (at 0.79 A cm^-3), rate capability of 80% (from 0.79 A cm^-3 to 7.9 A cm^-3), energy density of 23.7 Wh L^-1 (at 632 W L^-1), cycling stability of 83.3% (after 10000 cycles), opening up new avenues for developing high-volumetric flexible energy storage devices.

金属有机骨架作为一种有希望的用于电化学能量存储的电极材料引起了极大的兴趣，这是因为它们的多孔骨架有利于电解质离子扩散，以实现金属离子的可逆氧化还原反应，但通常具有导电性差和堆积密度低的缺点，具有提高速率能力和体积电容的缺点。我们报告了一种新型的柔性电池-超级电容器混合（BSH）器件，该器件基于有孔还原的氧化石墨烯（HRGO）阳极和HRGO / Ni（吡啶甲酸）₂（Ni（PA）₂）阴极。通过水热过程用硝酸蚀刻RGO而获得的HRGO具有丰富的微孔，有利于电解质离子快速扩散。超薄层状HRGO / Ni（PA）₂纸通过Ni的吸附制备²⁺上HRGO和HRGO / Ni的水热过程复杂²⁺复合物，可以提供738 F G重量和体积电容^-1 1 A G ^-1和747厘米˚F ^-3 1一厘米^-3。组装好的柔性BSH器件可提供67.1 F cm ^-3的体积电容（在0.79 A cm ^-3时），速率能力为80％（从0.79 A cm ^-3到7.9 A cm ^-3），能量密度为23.7 Wh L ^-1（在632 WL ^-1时），循环稳定性为83.3％（10000次循环后），为开发高容量柔性储能设备开辟了新途径。