Carbon cladding boosts graphite-phase carbon nitride for lithium-ion battery negative electrode materials†

Abstract

In this study, CSs-g-C₃N₄ carbon and nitrogen composites based on glucose carbon spheres were successfully synthesized. A high-temperature and high-pressure hydrothermal reaction successfully induces the amidation of glucose with melamine, and led to the synthesis of CSs-g-C₃N₄ carbon and nitrogen composites. A series of characterization tests and electrochemical tests revealed the lithium storage mechanism of the CSs-g-C₃N₄ composites. The experimental results show that the CSs-g-C₃N₄ composites exhibit excellent cycling performance in lithium-ion battery anode applications. Specifically, after 300 cycles at a current density of 1 A g⁻¹, the material still maintains a lithium storage capacity of 395.2 mA h g⁻¹. This data fully demonstrates the superiority and stability of CSs-g-C₃N₄ composites as anode materials for lithium-ion batteries. In addition, the successful preparation of CSs-g-C₃N₄ composites not only demonstrates the technical feasibility of using g-C₃N₄ to prepare carbon and nitrogen composites, but also provides a new idea and direction for the research and development of anode materials for lithium-ion batteries. This achievement is expected to promote the wider application of g-C₃N₄ in the field of energy storage and further enhance the performance of lithium-ion batteries.