Reverse Dual-Ion Battery via a ZnCl 2 Water-in-Salt Electrolyte

Dual-ion batteries are known for anion storage in the cathode coupled to cation incorporation in the anode. We flip the sequence of the anion/cation-storage chemistries of the anode and the cathode in dual-ion batteries (DIBs) by allowing the anode to take in anions and a cation-deficient cathode to host cations, thus operating as a reverse dual-ion battery (RDIB). The anion-insertion anode is a nanocomposite having ferrocene encapsulated inside a microporous carbon, and the cathode is a Zn-insertion Prussian blue, Zn3[Fe(CN)6]2. This unique battery configuration benefits from the usage of a 30 m ZnCl2 “water-in-salt” electrolyte. This electrolyte minimizes the dissolution of ferrocene; it raises the…

• NS
  National Science Foundation

  Award: 1551693
• UD
  U.S. Department of Energy

  Award: DE-AC02-06CH11357