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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Computational Chemistry

Background:

  • Coal-derived graphene-like materials offer a sustainable alternative for composite applications.
  • Understanding the electronic properties of these materials is crucial for optimizing their performance.
  • Functional impurities and structural defects are inherent challenges in coal-derived graphene.

Purpose of the Study:

  • To investigate the electronic structure and transport properties of coal-derived graphene-like materials.
  • To analyze the impact of functional groups (oxides, hydroxides) and ring disorder on electronic conductivity.
  • To explore the relationship between structural characteristics and the electrical performance of FCC copper composites.

Main Methods:

  • Utilizing ab initio plane wave density functional theory (DFT) for electronic structure calculations.
  • Analyzing the electronic density of states (DOS) to understand charge distribution.
  • Projecting electronic conductivity along specific spatial directions to assess anisotropy.

Main Results:

  • Functional groups and ring disorder introduce localized states near the Fermi level.
  • Graphene functionalization causes charge localization, while ring disorder impedes electron flow.
  • Crystal orientation and graphene purity significantly affect the anisotropy and magnitude of electronic transport.

Conclusions:

  • Structural imperfections in coal-derived graphene negatively impact electronic conductivity.
  • Tailoring graphene structure and purity is essential for improving electrical transport in composites.
  • This research underscores the importance of structural stress in achieving enhanced electrical conductivity.