Electrochemical Reduction of Silver Vanadium Phosphorous Oxide, Ag(2)VO(2)PO(4): Silver Metal Deposition and Associated Increase in Electrical Conductivity.
Electrochemical Reduction of Silver Vanadium Phosphorous Oxide, Ag(2)VO(2)PO(4): Silver Metal Deposition and Associated Increase in Electrical Conductivity.
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DOI：
10.1016/j.jpowsour.2010.04.033
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发表时间：
2010-10-01
影响因子：
9.2
通讯作者：
Takeuchi ES
中科院分区：
文献类型：
--
作者：
Marschilok AC;Kozarsky ES;Tanzil K;Zhu S;Takeuchi KJ;Takeuchi ES
本报告详细介绍了银钒磷氧化物 (Ag2VO2PO4, SVPO) 在锂基电化学电池中在每分子式单位 0 至 4 个电子范围内进行电化学还原过程中发生的化学变化和相关电阻变化。具体而言，由于 SVPO 阴极的变化，阴极电导率以及相关的电池直流电阻和电池交流阻抗值随着还原水平的变化而变化。最初，Ag+ 被还原为 Ag0（每个分子式单元 2 个电子，或每个分子式单元 4 个电子计算理论值的 50%），伴随着阴极电阻的显着降低，这与 SVPO 阴极内导电银金属基质的形成一致。随着 Ag+ 还原的进行，V5+ 还原开始；一旦 SVPO 还原过程进展到 V5+ 还原为 V4+ 为主导过程，电池和阴极电阻就会开始增加。如果放电继续到主要的阴极还原过程是将 V4+ 还原为 V3+，则阴极和电池电阻就会开始下降。全电池放电期间表现出的复杂阴极电阻模式是本研究的一个重要主题。
This report details the chemical and associated electrical resistance changes of silver vanadium phosphorous oxide (Ag2VO2PO4, 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 Ag0 (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, V5+ reduction initiates; once the SVPO reduction process progresses to where the reduction of V5+ to V4+ 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 V4+ to V3+, the cathode and cell electrical resistances then begin to decrease. The complex cathode electrical resistance pattern exhibited during full cell discharge is an important subject of this study.
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影响因子：
3.3
作者：
CHAMBERLAND, BL;PORTER, SK
通讯作者：
PORTER, SK
影响因子：
9.2
作者：
Moss, PL;Fu, R;Zheng, JP
通讯作者：
Zheng, JP
影响因子：
9.2
作者：
Chen, Kaimin;Merritt, Donald R.;Skarstad, Paul A.
通讯作者：
Skarstad, Paul A.
DOI：
10.1039/dt9930001525
发表时间：
1993-05-21
期刊：
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
影响因子：
--
作者：
KANG, HY;WANG, SL;LII, KH
通讯作者：
LII, KH
影响因子：
3.9
作者：
Song, YN;Zavalij, PY;Whittingham, MS
通讯作者：
Whittingham, MS