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Keywords:

  • organic pigments;
  • crystalline materials;
  • cathodes;
  • sodium-ion batteries
Thumbnail image of graphical abstract

Commercial 3,4,9,10-perylene-tetracarboxylicacid-dianhydride (PTCDA) without modification shows promising performance as a cathode for sodium-ion batteries. It exhibits a high reversible capacity of 145 mAh g−1, a rate capability of 91 mAh g−1 at 1000 mA g−1, and a stable cycle life. When discharged to 0.01 V, 15 sodium ions can be incorporated into a PTCDA, exhibiting an extremely high capacity of 1017 mAh g−1.