Effect of Additives on Electrochemical and Corrosion Behavior of Gel Type Electrodes for Zn-Air System

The corrosion behavior of the Zn anode is yet another major issue to be taken under consideration in the Zn-air system. In order to enhance electrochemical performance, a new aim is to find a possible delay in corrosion rates using 1 and 3 wt % of Bi or Ni as additives when compared with pure Zn ano...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2014-11, Vol.53 (44), p.17370-17375
Main Authors: Jo, Yong Nam, Kim, Hong Shin, Prasanna, K, Ilango, P. Robert, Lee, Won Jong, Eom, Seung Wook, Lee, Chang Woo
Format: Article
Language:English
Subjects:
Additives
Anodes
Charge transfer
Corrosion
Delay
Electrodes
Extrapolation
Hydrogen evolution
Zinc
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Summary:The corrosion behavior of the Zn anode is yet another major issue to be taken under consideration in the Zn-air system. In order to enhance electrochemical performance, a new aim is to find a possible delay in corrosion rates using 1 and 3 wt % of Bi or Ni as additives when compared with pure Zn anodes as gel type electrodes. Through Tafel extrapolation, the pure and 3 wt % Bi added Zn anodes show a 1.2718 mA and 0.8490 mA average corrosion current, respectively. Furthermore, the Zn anode with 3 wt % Bi shows increased 1328.9 Ω charge transfer resistance and lowered hydrogen evolution, meaning Bi is an effective additive for controlling the hydrogen evolution reaction as well as corrosion reaction in gel type electrodes.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie5027315