Abstract
The electrochemical properties of high-valence silver oxide Ag_(3)O_(4)in alkaline solution were investigated for the first time and the reduction mechanism of Ag_(3)O_(4) was proposed.It can be recognized that Ag_(3)O_(4)consists of_()Ag(Ⅲ) and Ag(Ⅱ)~(*).From the results of voltammetry and XRD experiments it was found that the reduction process of Ag_(3)O_(4) was more complicated.It could be electrochemically reduced through the series reactions of Ag(Ⅲ) →Ag(Ⅱ) →Ag(Ⅰ) →Ag(O) at low discharge rate or Ag(Ⅲ) →Ag(Ⅰ) →Ag(O) at higher discharge rate.And the Ag(Ⅱ)~(*) could be reduced to Ag directly at low potential region.In addition,it is interesting to note that Ag_(3)O_(4) presents the theoretical specific discharge capacity of 553.0mAh/g at high discharge rate,which is 27.8% higher than that of the commonly used cathodic material AgO in zinc/silver oxide battery.Under high discharge rate of 119C,Ag_(3)O_(4) still presents the specific discharge capacity as high as 83% of theoretical value.Ag_(3)O_(4) may have the attractive future for the use in alkaline batteries.
Keywords
High valence silver oxide, Ag_(3)O_(4), Silver-zinc battery, Alkaline battery
Publication Date
2006-05-28
Online Available Date
2006-05-28
Revised Date
2006-05-28
Received Date
2006-05-28
Recommended Citation
Yan CHENG, Ming YU, Man-ming YAN, Zhi-yu JIANG.
Electrochemical Behavior and Reduction Mechanism of High Valence Silver Oxide Ag_3O_4 in Alkaline Solution[J]. Journal of Electrochemistry,
2006
,
12(2): Article 24.
DOI: 10.61558/2993-074X.3328
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol12/iss2/24
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