Electrochemical Reduction of Ag2VP2O8 Composite Electrodes Visualized via In situ Energy Dispersive X-ray Diffraction (EDXRD). Unexpected Conductive Additive Effects

Kirshenbaum, Kevin C.; Bock, David C.; Zhong, Zhong; Marschilok, Amy C.; Takeuchi, Kenneth J.; Takeuchi, Esther

doi:10.1039/C5TA04523A

Title: Electrochemical Reduction of Ag₂VP₂O₈ Composite Electrodes Visualized via In situ Energy Dispersive X-ray Diffraction (EDXRD). Unexpected Conductive Additive Effects

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Abstract

In our study, we characterize the deposition of silver metal nanoparticles formed during discharge of Li/Ag₂VP₂O₈ cells with composite cathodes containing conductive carbon additive. Using in situ energy dispersive X-ray diffraction (EDXRD) of an intact battery, the location and distribution of silver metal nanoparticles generated upon reduction-displacement deposition within an Ag₂VP₂O₈ cathode containing a pre-existing percolation network can be observed for the first time. Our study yielded unexpected results where higher rate initial discharge generated a more effective conductive matrix. This stands in contrast to cells with cathodes with no conductive additive where a low rate initial discharge proved more effective. Our results provide evidence that using conductive additives in conjunction with an in situ reduction-displacement deposition of silver metal provides a path toward the ultimate goal of complete electrical contact and full utilization of all electroactive particles.

Authors:

Kirshenbaum, Kevin C. ^[1]; Bock, David C. ^[2]; Zhong, Zhong ^[1]; Marschilok, Amy C. ^[2]; Takeuchi, Kenneth J. ^[2]; Takeuchi, Esther ^[3]

Brookhaven National Lab. (BNL), Upton, NY (United States)
Stony Brook Univ., NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)

Publication Date:: Wed Jul 29 00:00:00 EDT 2015

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1229047

Report Number(s):: BNL-111122-2015-JA
Journal ID: ISSN 2050-7488

DOE Contract Number:: SC00112704

Resource Type:: Journal Article

Journal Name:: Journal of Materials Chemistry. A

Additional Journal Information:: Journal Volume: 3; Journal Issue: 35; Journal ID: ISSN 2050-7488

Publisher:: Royal Society of Chemistry

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats


                    Kirshenbaum, Kevin C., Bock, David C., Zhong, Zhong, Marschilok, Amy C., Takeuchi, Kenneth J., and Takeuchi, Esther. Electrochemical Reduction of Ag2VP2O8 Composite Electrodes Visualized via In situ Energy Dispersive X-ray Diffraction (EDXRD). Unexpected Conductive Additive Effects.  United States: N. p., 2015. 
        Web.  doi:10.1039/C5TA04523A.

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                    Kirshenbaum, Kevin C., Bock, David C., Zhong, Zhong, Marschilok, Amy C., Takeuchi, Kenneth J., & Takeuchi, Esther. Electrochemical Reduction of Ag2VP2O8 Composite Electrodes Visualized via In situ Energy Dispersive X-ray Diffraction (EDXRD). Unexpected Conductive Additive Effects.  United States.  https://doi.org/10.1039/C5TA04523A

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                    Kirshenbaum, Kevin C., Bock, David C., Zhong, Zhong, Marschilok, Amy C., Takeuchi, Kenneth J., and Takeuchi, Esther. 2015.  
        "Electrochemical Reduction of Ag2VP2O8 Composite Electrodes Visualized via In situ Energy Dispersive X-ray Diffraction (EDXRD). Unexpected Conductive Additive Effects".  United States.  https://doi.org/10.1039/C5TA04523A.

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@article{osti_1229047,

  title        = {Electrochemical Reduction of Ag2VP2O8 Composite Electrodes Visualized via In situ Energy Dispersive X-ray Diffraction (EDXRD). Unexpected Conductive Additive Effects},

  author       = {Kirshenbaum, Kevin C. and Bock, David C. and Zhong, Zhong and Marschilok, Amy C. and Takeuchi, Kenneth J. and Takeuchi, Esther},

  abstractNote = {In our study, we characterize the deposition of silver metal nanoparticles formed during discharge of Li/Ag2VP2O8 cells with composite cathodes containing conductive carbon additive. Using in situ energy dispersive X-ray diffraction (EDXRD) of an intact battery, the location and distribution of silver metal nanoparticles generated upon reduction-displacement deposition within an Ag2VP2O8 cathode containing a pre-existing percolation network can be observed for the first time. Our study yielded unexpected results where higher rate initial discharge generated a more effective conductive matrix. This stands in contrast to cells with cathodes with no conductive additive where a low rate initial discharge proved more effective. Our results provide evidence that using conductive additives in conjunction with an in situ reduction-displacement deposition of silver metal provides a path toward the ultimate goal of complete electrical contact and full utilization of all electroactive particles.},

  doi          = {10.1039/C5TA04523A},

  url          = {https://www.osti.gov/biblio/1229047},
  journal      = {Journal of Materials Chemistry. A},

  issn         = {2050-7488},

  number       = 35,

  volume       = 3,

  place        = {United States},

  year         = {Wed Jul 29 00:00:00 EDT 2015},

  month        = {Wed Jul 29 00:00:00 EDT 2015}

}

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Title: Electrochemical Reduction of Ag2VP2O8 Composite Electrodes Visualized via In situ Energy Dispersive X-ray Diffraction (EDXRD). Unexpected Conductive Additive Effects

Abstract

Citation Formats

Title: Electrochemical Reduction of Ag₂VP₂O₈ Composite Electrodes Visualized via In situ Energy Dispersive X-ray Diffraction (EDXRD). Unexpected Conductive Additive Effects