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The Three‐Dimensional Dendrite‐Free Zinc Anode on a Copper Mesh with a Zinc‐Oriented Polyacrylamide Electrolyte Additive
Author(s) -
Zhang Qi,
Luan Jingyi,
Fu Liang,
Wu Shengan,
Tang Yougen,
Ji Xiaobo,
Wang Haiyan
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201907830
Subject(s) - zinc , overpotential , anode , electrolyte , dendrite (mathematics) , nucleation , galvanic anode , materials science , inorganic chemistry , copper , chemical engineering , plating (geology) , chemistry , electrochemistry , electrode , metallurgy , organic chemistry , cathodic protection , geophysics , geology , geometry , mathematics , engineering
Rechargeable aqueous zinc‐ion batteries have been considered as a promising candidate for next‐generation batteries. However, the formation of zinc dendrites are the most severe problems limiting their practical applications. To develop stable zinc metal anodes, a synergistic method is presented that combines the Cu‐Zn solid solution interface on a copper mesh skeleton with good zinc affinity and a polyacrylamide electrolyte additive to modify the zinc anode, which can greatly reduce the overpotential of the zinc nucleation and increase the stability of zinc deposition. The as‐prepared zinc anodes show a dendrite‐free plating/stripping behavior over a wide range of current densities. The symmetric cell using this dendrite‐free anode can be cycled for more than 280 h with a very low voltage hysteresis (93.1 mV) at a discharge depth of 80 %. The high capacity retention and low polarization are also realized in Zn/MnO 2 full cells.