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An Aqueous Zinc‐Ion Battery Based on Copper Hexacyanoferrate
Author(s) -
Trócoli Rafael,
La Mantia Fabio
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201403143
Subject(s) - zinc , inorganic chemistry , battery (electricity) , chemistry , electrolyte , aqueous solution , copper , electrode , foil method , materials science , power (physics) , physics , organic chemistry , quantum mechanics , composite material
A new zinc‐ion battery based on copper hexacyanoferrate and zinc foil in a 20 m M solution of zinc sulfate, which is a nontoxic and noncorrosive electrolyte, at pH 6 is reported. The voltage of this novel battery system is as high as 1.73 V. The system shows cyclability, rate capability, and specific energy values near to those of lithium‐ion organic batteries based on Li 4 Ti 5 O 12 and LiFePO 4 at 10 C. The effects of Zn 2+ intercalation and H 2 evolution on the performance of the battery are discussed in detail. In particular, it has been observed that hydrogen evolution can cause a shift in pH near the surface of the zinc electrode, and favor the stabilization of zinc oxide, which decreases the performance of the battery. This mechanism is hindered when the surface of zinc becomes rougher.