Nitrogen-enriched graphene framework from a large-scale magnesiothermic conversion of CO₂ with synergistic kinetics for high-power lithium-ion capacitors

This paper presents a novel nitrogen-enriched graphene framework (NGF) synthesized via a large-scale magnesiothermic combustion synthesis using CO₂ and melamine. The resulting NGF exhibits a crosslinked porous structure, abundant functional groups, and high electrical conductivity (10524 S m⁻¹), leading to enhanced ion diffusion and electron transport. Consequently, the NGF demonstrates excellent lithium storage performance with capacities of 1361 mA h g⁻¹ at 0.1 A g⁻¹ and 827 mA h g⁻¹ at 3 A g⁻¹. A lithium-ion capacitor (LIC) based on this NGF achieves a high energy density of 151 Wh kg⁻¹ and retains 86 Wh kg⁻¹ at 49 kW kg⁻¹, showcasing its potential for high-power applications.

Chen Li, Xiong Zhang, Kai Wang, Xianzhong Sun, Yanan Xu, Fangyuan Su, Cheng-Meng Chen, Fangyan Liu, Zhong-Shuai Wu, Yanwei Ma