Battery-supercapacitor hybrid (BSH) device is one of the most promising candidates for next advanced energy storage systems because it can bridge the performance gap between lithium ion batteries and conventional capacitors. Herein, we report a novel porous core-shell structured Fe₂O₃@Fe₃C@C nanochains and urchin-like Ni–Co carbonate hydroxide hybridized (denoted as NiCo–CHH) microspheres for advanced battery-type supercapacitors. The as-obtained Fe₂O₃@Fe₃C@C anode shows high specific capacity (611 C g⁻¹) and good rate capability. The fabricated NiCo–CHH cathode delivers high specific capacity (814 C g⁻¹) and excellent cycling stability. When assembled into a battery-type supercapacitor, the NiCo–CHH//Fe₂O₃@Fe₃C@C device delivers a high energy density (95.2 Wh kg⁻¹) and excellent cycling stability. Moreover, In situ Raman spectroscopy proves the reversibility of the NiCo–CHH electrode, and the synergistic effects of Ni and Co ions, further revealing its energy storage mechanism. These findings provide a novel insight on high-performance battery-type supercapacitors.

电池-超级电容器混合（BSH）器件是下一代高级能量存储系统最有希望的候选者之一，因为它可以弥合锂离子电池和传统电容器之间的性能差距。在这里，我们报道了一种新型的多孔核-壳结构的Fe ₂ O ₃ @Fe ₃ C @ C纳米链和顽童状的Ni-Co氢氧化碳氢氧化物杂交（表示为NiCo-CHH）微球，用于先进的电池型超级电容器。所获得的Fe ₂ O ₃ @Fe ₃ C @ C阳极显示出高的比容量（611 C g ^-1）和良好的倍率能力。制成的NiCo–CHH阴极具有高比容量（814 C g ^-1）和出色的循环稳定性。当组装成电池型超级电容器时，NiCo–CHH // Fe ₂ O ₃ @Fe ₃ C @ C装置可提供高能量密度（95.2 Wh kg ^-1）和出色的循环稳定性。此外，原位拉曼光谱证明了NiCo-CHH电极的可逆性，以及Ni和Co离子的协同作用，进一步揭示了其能量存储机理。这些发现为高性能电池型超级电容器提供了新颖的见解。