Lithium-ion capacitors are envisaged as promising energy-storage devices to simultaneously achieve a large energy density and high-power output at quick charge and discharge rates. However, the mismatched kinetics between capacitive cathodes and faradaic anodes still hinder their practical application for high-power purposes. To tackle this problem, the electron and ion transport of both electrodes should be substantially improved by targeted structural design and controllable chemical doping. Herein, nitrogen-enriched graphene frameworks are prepared via a large-scale and ultrafast magnesiothermic combustion synthesis using CO₂ and melamine as precursors, which exhibit a crosslinked porous structure, abundant functional groups and high electrical conductivity (10524 S m⁻¹). The material essentially delivers upgraded kinetics due to enhanced ion diffusion and electron transport. Excellent capacities of 1361 mA h g⁻¹ and 827 mA h g⁻¹ can be achieved at current densities of 0.1 A g⁻¹ and 3 A g⁻¹, respectively, demonstrating its outstanding lithium storage performance at both low and high rates. Moreover, the lithium-ion capacitor based on these nitrogen-enriched graphene frameworks displays a high energy density of 151 Wh kg⁻¹, and still retains 86 Wh kg⁻¹ even at an ultrahigh power output of 49 kW kg⁻¹. This study reveals an effective pathway to achieve synergistic kinetics in carbon electrode materials for achieving high-power lithium-ion capacitors.

锂离子电容器被认为是很有前途的储能设备，可以在快速充电和放电速率下同时实现大能量密度和高功率输出。然而，电容阴极和法拉第阳极之间不匹配的动力学仍然阻碍了它们在高功率方面的实际应用。为了解决这个问题，应该通过有针对性的结构设计和可控的化学掺杂来显着改善两个电极的电子和离子传输。在此，以CO ₂和三聚氰胺为前驱体，通过大规模超快镁热燃烧合成制备富氮石墨烯骨架，该骨架具有交联的多孔结构、丰富的官能团和高电导率（10524 S m ^-1）。由于增强的离子扩散和电子传输，该材料基本上提供了升级的动力学。电流密度分别为 0.1 A g ^-1和 3 A g ^{-1 时}可实现1361 mA h g ^-1和 827 mAh g ^{-1 的}优异容量，证明其在低倍率和高倍率下均具有出色的锂存储性能。此外，锂离子电容器基于这些富氮石墨烯框架显示器的高能量密度151瓦时千克^-1，仍然保留了86瓦时千克^-1甚至在49的超高功率输出千瓦千克^-1. 该研究揭示了在碳电极材料中实现协同动力学以实现高功率锂离子电容器的有效途径。