Fig. 1. Structural formula and ball-and-stick modeling of PI monomers

Fig. 2. Initial reaction system

Fig. 3. The system during the relaxation phase

Fig. 4. Schematic diagram of the system temperature evolution process

Fig. 5. Final molecular configurations at different reaction temperatures

Fig. 6. Pressure evolution during the reaction

Fig. 7. Final molecular configurations at different reaction time

Fig. 8. Final molecular configurations at different warming/cooling temperatures

Fig. 9. Schematic diagram of the warming/cooling rate

Fig. 10. Final molecular configurations for different numbers of reactions

Fig. 11. Formation of LIG porous structure

Fig. 12. Schematic diagram of the laser-induced decomposition carbonization of polymer

Fig. 13. Evolution of product molecular number with reaction time

Fig. 14. Molecular configurations of different reaction nodes at 3 300 K

Fig. 15. Instantaneous molecular configurations at the target temperature of 3 300 K

Fig. 16. RDF of the original PI

Fig. 17. Honeycomb map structure of single layer graphene

Fig. 18. RDF analysis

Fig. 19. Schematic diagram of the laser-induced preparation of the LIG electrode

Fig. 20. Electrochemical performance of LIG micro-supercapacitor