Recent Advances in Developing High-Performance Anode for Potassium-Ion Batteries based on Nitrogen-Doped Carbon Materials

Owing to the low potential (vs K/K⁺), good cycling stability, and sustainability, carbon-based materials stand out as one of the optimal anode materials for potassium-ion batteries (PIBs). However, achieving high-rate performance and excellent capacity with the current carbon-based materials is challenging because of the sluggish reaction kinetics and the low capacity of carbon-based anodes. The doping of nitrogen proves to be an effective way to improve the rate performance and capacity of carbon-based materials as PIB anode. However, a review article is lacking in systematically summarizing the features and functions of nitrogen doping types. In this sense, it is necessary to provide a fundamental understanding of doped nitrogen types in nitrogen-doped(N-doped) carbon materials. The types, functions, and applications of nitrogen-doped carbon-based materials are overviewed in this review. Then, the recent advances in the synthesis, properties, and applications of N-doped carbon as both active and modification materials for PIBs anode are summarized. Finally, doped nitrogen's main features and functions are concluded, and critical perspectives for future research in this field are outlined.