Electrochemical Reduction of Silver Vanadium Phosphorous Oxide, Ag(2)VO(2)PO(4): Silver Metal Deposition and Associated Increase in Electrical Conductivity.

Journal of Power Sources
Amy C MarschilokEsther S Takeuchi

Abstract

This report details the chemical and associated electrical resistance changes of silver vanadium phosphorous oxide (Ag(2)VO(2)PO(4), SVPO) incurred during electrochemical reduction in a lithium based electrochemical cell over the range of 0 to 4 electrons per formula unit. Specifically the cathode electrical conductivities and associated cell DC resistance and cell AC impedance values vary with the level of reduction, due the changes of the SVPO cathode. Initially, Ag(+) is reduced to Ag(0) (2 electrons per formula unit, or 50% of the calculated theoretical value of 4 electrons per formula unit), accompanied by significant decreases in the cathode electrical resistance, consistent with the formation of an electrically conductive silver metal matrix within the SVPO cathode. As Ag(+) reduction progresses, V(5+) reduction initiates; once the SVPO reduction process progresses to where the reduction of V(5+) to V(4+) is the dominant process, both the cell and cathode electrical resistances then begin to increase. If the discharge then continues to where the dominant cathode reduction process is the reduction of V(4+) to V(3+), the cathode and cell electrical resistances then begin to decrease. The complex cathode electrical resistan...Continue Reading

References

Nov 1, 1988·Pacing and Clinical Electrophysiology : PACE·E S TakeuchiW Greatbatch

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Citations

Aug 9, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·David C BockEsther S Takeuchi
Nov 2, 2013·Electrochimica Acta·David C BockEsther S Takeuchi
Feb 19, 2015·ACS Applied Materials & Interfaces·David C BockEsther S Takeuchi
Apr 2, 2015·Physical Chemistry Chemical Physics : PCCP·Kevin C KirshenbaumEsther S Takeuchi
Feb 26, 2015·Chemical Communications : Chem Comm·Jessica L DurhamKenneth J Takeuchi
Apr 8, 2014·Physical Chemistry Chemical Physics : PCCP·Kevin C KirshenbaumEsther S Takeuchi
Aug 27, 2016·Accounts of Chemical Research·Jessica L DurhamKenneth J Takeuchi
Sep 2, 2016·ACS Applied Materials & Interfaces·Jianping HuangEsther S Takeuchi

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