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Title: Electrochemical reduction of an Ag2VO2PO4 particle: dramatic increase of local electronic conductivity

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI:https://doi.org/10.1039/c5cp00961h· OSTI ID:1210474
 [1];  [2];  [2];  [2];  [2];  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Stony Brook Univ., NY (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
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Previously, we reported that electrodes containing silver vanadium phosphate (Ag2VO2PO4) powder exhibit a 15 000 fold increase in conductivity after discharge, concurrent with the formation of silver metal. In this study, in order to disentangle the complex nature of electrodes composed of electroactive powders, an electrochemical reduction of individual particles of Ag2VO2PO4 was conducted, to more directly probe the intrinsic materials properties of Ag2VO2PO4. Specifically, individual particle conductivity data from a nanoprobe system combined with SEM and optical imaging results revealed that the depth of discharge within an Ag2VO2PO4 particle is closely linked to the conductivity increase. Of note, the formation of silver metal may affect both inter- and intraparticle conductivity of the Ag2VO2PO4 material.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2M); Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012673; AC02-98CH10886
OSTI ID:
1210474
Journal Information:
Physical Chemistry Chemical Physics. PCCP, Vol. 17, Issue 17; Related Information: m2M partners with Stony Brook University (lead); Brookhaven National Laboratory; Columbia University; Georgia Institute of Technology; Oak Ridge National Laboratory; Rensselaer Polytechnic Institute; University of California, Berkeley; University of North Carolina at Chapel Hill; ISSN 1463-9076
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

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Cited By (5)

Materials chemistry toward electrochemical energy storage journal January 2016
Tomographic 3D Analysis of Reduction Displacement Reaction with Associated Formation of a Conductive Network in High Energy Primary Batteries journal January 2019
Operando Study of LiV 3 O 8 Cathode: Coupling EDXRD Measurements to Simulations journal January 2018
Energy Dispersive X-ray Diffraction (EDXRD) of Li 1.1 V 3 O 8 Electrochemical Cell journal January 2017
Review of the Stability/Capacity Trade-off in Silver Hollandite Lithium Battery Cathodes journal January 2018

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