Lithium-ion Capacitor is emerging as a promising strategy that integrated high energy of Lithium-ion batteries with high power of supercapacitors. However, conventional activated carbon presents great challenges as supercapacitive electrodes. In this work, porous nano-carbon onion rings (NCOR) with N-doping were synthesized via the pyrolysis of nanoarchitecture precursor, which yielded a surface area of 1769.76 m² g ^− 1. The NCOR electrode showed a capacity of 68.78 mAh g ^− 1 with a stable capacity retention of 83.12% after 1000 cycles in a voltage window of 2.5–4.2 V vs. Li/Li⁺. The impedance tests measured at different potentials shed some light on the mechanism of charge storage. We demonstrated the promise of NCOR for energy storage in Lithium-ion capacitors.

锂离子电容器正在成为一种有前途的战略，它将锂离子电池的高能量与高功率的超级电容器集成在一起。然而，传统的活性炭作为超级电容电极提出了巨大的挑战。在这项工作中，多孔纳米碳洋葱圈（NCOR）与N-掺杂合成通过纳米架构前体的热解，其产生的1769.76米表面积² 克 ^{-  1}。所述NCOR电极显示出68.78毫安的容量克 ^{-  1}在2.5-4.2 V相对于的电压窗口1000次循环后的83.12％的稳定的容量保持率。锂/锂⁺。在不同电位下测得的阻抗测试为电荷存储的机理提供了一些启示。我们展示了NCOR在锂离子电容器中储能的前景。