磷酸银钒（Ag(2)VO(2)PO(4)）的电化学还原：导电金属银纳米颗粒的形成
Electrochemical reduction of silver vanadium phosphorous oxide, Ag(2)VO(2)PO(4): the formation of electrically conductive metallic silver nanoparticles.
作者信息
Takeuchi Esther S, Marschilok Amy C, Tanzil Kevin, Kozarsky Eric S, Zhu Shali, Takeuchi Kenneth J
机构信息
Department of Chemical and Biological Engineering, University at Buffalo (SUNY), Buffalo, NY 14260.
出版信息
Chem Mater. 2009 Oct 27;21(20):4934-4939. doi: 10.1021/cm902102k.
Abstract
As a cathode material, silver vanadium phosphorous oxide (Ag(2)VO(2)PO(4)) displays several notable electrochemical properties: large capacity, high current capability, and an effective delivery of high current pulses. These cell performance characteristics can be attributed to the presence of silver nanoparticles formed in-situ during the electrochemical reduction of Ag(2)VO(2)PO(4). Specifically, changes in the composition and structure of Ag(2)VO(2)PO(4) with reduction, especially the formation of silver nanoparticles, are detailed to rationalize a 15,000 fold increase in conductivity with initial discharge, which can be related to the power characteristics associated with Ag(2)VO(2)PO(4) cathodes in primary lithium batteries.
摘要
作为一种阴极材料，磷酸银钒（Ag(2)VO(2)PO(4)）展现出几种显著的电化学性质：大容量、高电流能力以及高电流脉冲的有效传递。这些电池性能特征可归因于在Ag(2)VO(2)PO(4)的电化学还原过程中原位形成的银纳米颗粒。具体而言，详细阐述了Ag(2)VO(2)PO(4)随着还原过程在组成和结构上的变化，尤其是银纳米颗粒的形成，以解释初始放电时电导率增加15000倍的现象，这可能与一次锂电池中Ag(2)VO(2)PO(4)阴极的功率特性有关。
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