Science Advances

Supplementary Materials

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  • fig. S1. Charge/discharge curves and differential capacity (dQ/dV) curves.
  • fig. S2. The profile of GITT against time.
  • fig. S3. Electrochemical behavior before and after Li intercalation.
  • fig. S4. Schematic illustrations of the crystalline structures corresponding to the pristine and Li-intercalated states.
  • fig. S5. DOS and PDOS profiles.
  • fig. S6. Ex situ powder XRD patterns without conductive carbon before (left) and after (right) being immersed in a lithium naphthalenide/THF solution.
  • fig. S7. Schematic illustration of closed parallel-pellet cell used for electrical measurements.
  • fig. S8. Interpretation of electron and ion transport mechanism of the proposed material.
  • fig. S9. Dependence of electrical properties on the treatment time of the chemical Li intercalation.
  • fig. S10. Electrical properties of the Li-intercalated 2,6-Naph(COOLi)2 samples at various temperatures.
  • fig. S11. Powder XRD patterns of pristine nondoped sample (black line) and Li-doped sample after heating (red line).
  • fig. S12. Temperature dependence of in situ powder XRD patterns of Li-intercalated 2,6-Naph(COOLi)2 for temperatures of up to 400°C in the high-angle region.

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