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Keywords:

  • aqueous electrolytes;
  • organic electrodes;
  • sodium ion batteries;
  • hybrid batteries
Thumbnail image of graphical abstract

An aqueous sodium ion hybrid battery consisting of disodium naphthalenediimide salt (anode) and KCo0.5Cu0.5Fe(CN)6 (cathode) is reported. Both electrode materials are inexpensive and exhibit appropriate operating voltages and robust reversibility under neutral aqueous electrolyte conditions, delivering a full-cell voltage of 1.1 V with 88% capacity retention after 100 cycles.