Fig. 1. Deformation in length of three types of graphite in the temperature range of measurement

Fig. 2. Thermal diffusivity of three types of graphite in the temperature range of measurement

Fig. 3. XRD results of three types of graphite

Fig. 4. SEM images of the 300# graphite

Fig. 5. SEM images of the as-received IG110 and NG-CT-10 graphite

Fig. 6. Low-magnification TEM images of the 300# graphite

Fig. 7. High-magnification TEM images of the 300# graphite

Fig. 8. Overall STEM bright field images of the IG110 graphite

Fig. 9. The SAED pattern and different zones of the IG110 graphite

Fig. 10. The overall STEM bright field image and the local high-magnification image，layers and voids of the NG-CT-10 graphite

Fig. 11. SAED pattern and the HRTEM images and different zones of the NG-CT-10 graphite