LAUSR

Abstract In recent years, metal ion batteries have been developed rapidly and have been made great progress, but non-metal ion batteries have rarely been reported. In our work, carbon black (cb) is used as cathode material for iodine-ion battery. The electrolyte uses ethylene glycol as a solvent and exhibits exceptional stability, and has been experimentally proven to have high cycle stability when zinc and copper are used as anodes for iodide-ion battery. When the zinc foil is used as the negative electrode, the specific capacity is 83 mA h gcb−1 at charge current density of 1 A g−1, and the specific capacity does not attenuated after 10000 cycles. Under the same conditions, when the copper foil is used as negative electrode, the average specific capacity is 92 mA h gcb−1, and the specific capacity is 50 mA h gcb−1 after about 4000 cycles. After X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) characterization tests, it is verified that the iodide-ion is intercalated in the carbon material instead of the redox reaction during the charging and discharging process.