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Electrochemical Sodium Ion Intercalation Properties of Na2.7Ru4O9 in Nonaqueous and Aqueous Electrolytes

Title
Electrochemical Sodium Ion Intercalation Properties of Na2.7Ru4O9 in Nonaqueous and Aqueous Electrolytes
Authors
Jung, YH[Jung, Young Hwa]Hong, ST[Hong, Seung-Tae]Kim, DK[Kim, Do Kyung]
DGIST Authors
Hong, ST[Hong, Seung-Tae]
Issue Date
2013
Citation
Journal of the Electrochemical Society, 160(6), A897-A900
Type
Article
Article Type
Article
Keywords
Anodic PeaksAqueous ElectrolyteCyclic VoltammogramsElectrochemical DataElectrolytesMetal IonsNon-Aqueous ElectrolytesOne-Dimensional TunnelsOrganic ElectrolyteReversible CapacitySolid State Reactions
ISSN
0013-4651
Abstract
This paper represents the first description of the electrochemical sodium ion intercalation properties of Na2.7Ru4O9 in both nonaqueous and aqueous electrolytes. Na2.7Ru4O 9 was synthesized at 700-850°C by solid-state reaction under Ar flow. It has single, double and triple chains of edge-sharing RuO6 octahedra and one-dimensional tunnels between them parallel to the b-axis, accommodating three different sites of Na1, Na2 and Na3. In an organic electrolyte (1 M NaClO4 in PC), Na2.7Ru4O9 shows three redox peaks in its cyclic voltammogram between 2.8 and 3.9 V vs. Na. In an aqueous (1 M Na2SO4) electrolyte, Na2.7Ru 4O9 exhibits three anodic peaks during the first charge, similar to the behavior observed in the organic electrolyte. However, the three peaks become a single broad peak over the following cycles. Electrochemical data and ex-situ XRD results indicate that once Na ions are removed from the Na 2.7Ru4O9 structure containing the maximum amount of sodium, only a portion (<60%) can be re-intercalated and that the aqueous electrolyte allows a lower reversible capacity than the nonaqueous electrolyte. © 2013 The Electrochemical Society. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/3294
DOI
10.1149/2.113306jes
Publisher
Electrochemical Society
Related Researcher
  • Author Hong, Seung Tae Discovery Lab(Batteries & Materials Discovery Laboratory)
  • Research Interests
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringDiscovery Lab(Batteries & Materials Discovery Laboratory)1. Journal Articles


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