MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Pseudocapacitive Behavior of Ag3PO4 Nanospheres Prepared by a Sonochemical Process
Chengxiang ZhengHua YangYang Yang
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2017 Volume 58 Issue 2 Pages 298-301

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Abstract

Ag3PO4 nanospheres with an average size of ~300 nm were synthesized via a sonochemical process. The electrochemical performances of the as-synthesized Ag3PO4 nanospheres in aqueous KOH electrolyte with different concentrations were investigated by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The measured cyclic voltammetry curves as well as charge-discharge curves reveal a good pseudocapacitive behavior of Ag3PO4 nanospheres. In a 1 M KOH electrolyte at a current density of 0.5 mA cm−2, the specific capacitance of Ag3PO4 nanospheres is obtained to be 832 F g−1. However, Ag3PO4 nanospheres exhibit an inferior charge-discharge cycling stability, which could be due to the formation of Ag2O during the cycling process.

Fig. 4 Capacitance retention of Ag3PO4 nanospheres as a function of the charge-discharge cycling number in different KOH electrolyte concentrations at a constant current density of 1 mA cm−2. Fullsize Image
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© 2016 The Japan Institute of Metals and Materials
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