“Two-for-one” strategy is an effective method to construct two kinds of materials from a single precursor owing to the simplicity of fabricating procedure and reduction of manufacturing cost. However, such a strategy has seldom been utilized to produce both battery-type and capacitive electrodes of a hybrid supercapacitor (HSC) device. Here, we adopt the “two-for-one” strategy to fabricate three-dimensional (3D) porous iron-doped (Fe-doped) Co₃O₄ and nitrogen-doped (N-doped) carbon via a single bimetallic metal–organic framework, FeCo-ZIF-67. Fe-doped amounts and carbonization temperature are used to adjust their individual electrochemical behaviors. The optimal 3D porous Fe-doped Co₃O₄ and N-doped carbon possess a high capacitance of 767.9 and 277C g⁻¹ at 1 A g⁻¹, respectively. Charge storage mechanism of Fe-doped Co₃O₄ is further investigated via analysis of capacitive and diffusion-controlled contribution. A Fe-doped Co₃O₄//N-doped carbon HSC device achieves desirable specific energy (37 Wh kg⁻¹) and power (750 Wkg⁻¹), and satisfied cycling stability (90% retention after 4000 cycles). A light-emitting diode (LED) is successfully light by the HSC device, suggesting its potential application in the field of green energy conversion and storage devices.

“二对一”策略是一种有效的方法，由于其制造过程简单且降低了制造成本，因此可以从单一前体中构造出两种材料。但是，这种策略很少用于生产混合超级电容器（HSC）装置的电池型和电容式电极。在这里，我们采用“一对一”策略通过单个双金属金属制造三维（3D）多孔铁掺杂（Fe掺杂）Co ₃ O ₄和氮掺杂（N掺杂）碳，有机框架FeCo-ZIF-67。掺铁量和碳化温度用于调节它们各自的电化学行为。最佳3D多孔铁掺杂Co ₃ O ₄和N掺杂碳在1 A g ^-1下分别具有767.9和277C g ^-1的高电容。通过分析电容和扩散控制的贡献，进一步研究了Fe掺杂的Co ₃ O _4的电荷存储机理。Fe掺杂的Co ₃ O ₄ // N掺杂的碳HSC器件可实现理想的比能（37 Wh kg ^-1）和功率（750 Wkg ^-1），并具有令人满意的循环稳定性（4000次循环后90％的保留率）。HSC设备已成功将发光二极管（LED）点亮，表明其在绿色能源转换和存储设备领域的潜在应用。