Hybrid supercapacitors (HSCs) can simultaneously achieve battery-level energy as well as capacitor-level power and cycle life in a single device. To construct such HSCs, porous boron-doped diamond (BDD) films fabricated by a template-free method via regrowth of diamond nanoparticles were employed as the electrodes and water-soluble redox couples (Fe (CN)₆^3−/4−) as the electrolyte. For the three-electrode system, the porous BDD electrode delivers a capacitance of 13.08 mF cm⁻² in 1.0 M Na₂SO₄, and a capacity of 78.23 mAh g⁻¹ in 0.05 M Fe (CN)₆^3−/4− + 1.0 M Na₂SO₄ when a scan rate of 10 mV s⁻¹ is applied. For the symmetric two-electrode system, the porous BDD electrode exhibits a capacitance of 13.04 mF cm⁻² in 1.0 M Na₂SO₄ and a capacity of 34.74 mAh g⁻¹ in 0.05 M Fe (CN)₆^3−/4− + 1.0 M Na₂SO₄ at the same scan rate. The capacitance (capacity) remains about 92% of its initial value after 5000 cyclic voltammetry cycles in all conditions. The specific power densities (normalized by the mass of electrode active material only) are 0.17 and 1.05 kW kg⁻¹, with their specific energy densities of 5.51 and 38.10 W h kg⁻¹, respectively. Thus, the porous BDD films, together with the water-soluble redox electrolyte, have profound applications in high-performance hybrid supercapacitors construction for future power devices.

混合超级电容器（HSC）可以在单个设备中同时实现电池级能量，电容器级功率和循环寿命。为了构建这样的HSC，将通过无模板方法通过金刚石纳米粒子的再生而制造的多孔掺硼金刚石（BDD）薄膜用作电极，并使用水溶性氧化还原对（Fe（CN）₆ ^{3- / 4-}）作为电极。电解质。对于三电极系统，多孔BDD电极在1.0 M Na ₂ SO _4中的电容量为13.08 mF cm ^-2，在0.05 M Fe（CN）₆ ^{3- / 4-中}的电容量为78.23 mAh g ^-1扫描速率为10 mV s ^-1时 + 1.0 M Na ₂ SO ₄被申请;被应用。对于对称的两电极系统，多孔BDD电极在1.0 M Na ₂ SO _4中的电容为13.04 mF cm ^-2，在0.05 M Fe（CN）₆ ^{3-4- / 4-中}的电容为34.74 mAh g ^-1  + 1.0 M Na ₂ SO ₄的扫描速率相同。在所有条件下经过5000次循环伏安循环后，电容（电容）仍约为其初始值的92％。比功率密度（仅通过电极活性材料的质量进行归一化）为0.17和1.05 kW kg ^-1，比能量密度为5.51和38.10 W h kg ^-1， 分别。因此，多孔BDD膜与水溶性氧化还原电解质一起，在未来功率器件的高性能混合超级电容器构造中具有广泛的应用。