For miniaturized capacitive energy storage, volumetric and areal capacitances are more important metrics than gravimetric ones because of the constraints imposed by device volume and chip area. Typically used in commercial supercapacitors, porous carbons, although they provide a stable and reliable performance, lack volumetric performance because of their inherently low density and moderate capacitances. Here we report a high-performing electrode based on conductive hexaaminobenzene (HAB)-derived two-dimensional metal−organic frameworks (MOFs). In addition to possessing a high packing density and hierarchical porous structure, these MOFs also exhibit excellent chemical stability in both acidic and basic aqueous solutions, which is in sharp contrast to conventional MOFs. Submillimetre-thick pellets of HAB MOFs showed high volumetric capacitances up to 760 F cm⁻³ and high areal capacitances over 20 F cm⁻². Furthermore, the HAB MOF electrodes exhibited highly reversible redox behaviours and good cycling stability with a capacitance retention of 90% after 12,000 cycles. These promising results demonstrate the potential of using redox-active conductive MOFs in energy-storage applications.

对于小型化的电容式能量存储，由于器件体积和芯片面积的限制，体积和面积电容比重力测量更为重要。通常用于商业超级电容器中的多孔碳尽管具有稳定可靠的性能，但由于其固有的低密度和适度的电容，因而缺乏体积性能。在这里，我们报告基于导电六氨基苯（HAB）衍生的二维金属有机框架（MOF）的高性能电极。这些MOF除具有高堆积密度和分层多孔结构外，在酸性和碱性水溶液中均表现出出色的化学稳定性，这与常规MOF形成了鲜明的对比。^-3和超过20 F cm ^-2的高面电容。此外，HAB MOF电极表现出高度可逆的氧化还原行为和良好的循环稳定性，在12,000次循环后的电容保持率为90％。这些有希望的结果证明了在储能应用中使用氧化还原活性导电MOF的潜力。