Nitrogen-Deficient Graphitic Carbon Nitride with Enhanced Performance for Lithium Ion Battery Anodes

Abstract

Graphitic carbon nitride (g-CN) behaving as a layered feature with graphite was indexed as a high-content nitrogen-doping carbon material, attracting increasing attention for application in energy storage devices. However, poor conductivity and resulting serious irreversible capacity loss were pronounced for g-CN material due to its high nitrogen content. In this work, magnesiothermic denitriding technology is demonstrated to reduce the nitrogen content of g-CN (especially graphitic nitrogen) for enhanced lithium storage properties as lithium ion battery anodes. The obtained nitrogen-deficient g-CN (ND-g-CN) exhibits a thinner and more porous structure composed of an abundance of relatively low nitrogen doping wrinkled graphene nanosheets. A highly reversible lithium storage capacity of 2753 mAh/g was obtained after the 300th cycle with an enhanced cycling stability and rate capability. The presented nitrogen-deficient g-CN with outstanding electrochemical performances may unambiguously promote the application of g-CN materials in energy-storage devices.

Thermodynamically Stable Mesoporous C3N7 and C3N6 with Ordered Structure and Their Excellent Performance for Oxygen Reduction Reaction

“…It is important to engineer a core structure of carbon nitride to increase the activity of carbon nitride itself, then activity of its composites could be further improved. Several N‐deficient g‐C 3 N 4 were reported for energy storage applications . Although this strategy increases the electronic conductivity of carbon nitride, reduced nitrogen content could diminish ORR activity of carbon nitride because it is believed that pyridinic N and graphitic N are active sites in the g‐C 3 N 4 framework for ORR.…”

Interlayered Dendrite‐Free Lithium Plating for High‐Performance Lithium‐Metal Batteries

“…The high‐resolution N 1s spectra of g‐C 3 N 4 powder and all g‐C 3 N 4 /CC reveal typical pyridinic N at ≈398.3 eV, pyrrolic N at ≈399.5 eV, and graphitic N at ≈400.5 eV, corresponding to the CNC (sp 2 ), N[C] 3 (sp 3 ), and CNH x (Figure S4, Supporting Information) . The high‐resolution C 1s spectra show the characteristic peak of g‐C 3 N 4 at ≈288.4 eV, relating to NCN (Figure S5, Supporting Information) . Meanwhile, the ratio of NCN increases as the amount of g‐C 3 N 4 in g‐C 3 N 4 /CC increases.…”

A Cost‐Effective and Scaleable Approach for the In‐Situ Synthesis of Porous Carbon‐Coated Micrometer‐Sized AlSi Particles as Anode for Lithium‐Ion Batteries

“…Additionally, the existence of C−N bond (286.2 eV in C 1s spectrum, Figure c) demonstrates that the nitrogen is doped into the carbon framework . Moreover, the N 1s spectrum (Figure d) can be divided and fitted into three peaks centered at 397.6, 399.4, and 401.3 eV, respectively, which are coincident with the pyridinic, pyrrolic, and graphitic types of N atoms doped in the carbon framework ,. Therefore, we achieve N‐doping in carbon by utilizing 3‐AP as both carbon and nitrogen source.…”