Development of vanadium-based polyanion positive electrode active materials for high-voltage sodium-based batteries
Polyanion compounds offer a playground for designing prospective electrode active materials for sodium-ion storage due to their structural diversity and chemical variety. Here, by combining a NaVPO4F composition and KTiOPO4-type framework via a low-temperature (e.g., 190 °C) ion-exchange synthesis approach, we develop a high-capacity and high-voltage positive electrode active material. When tested in a coin cell configuration in combination with a Na metal negative electrode and a NaPF6-based non-aqueous electrolyte solution, this cathode active material enables a discharge capacity of 136 mAh g−1 at 14.3 mA g−1 with an average cell discharge voltage of about 4.0 V. Furthermore, a specific discharge capacity of 123 mAh g−1 at 5.7 A g−1 is also reported for the same cell configuration. Through ex situ and operando structural characterizations, we also demonstrate that the reversible Na-ion storage at the positive electrode occurs mostly via a solid-solution de/insertion mechanism.
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1 publication, 2.86%
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1 publication, 2.86%
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Journal of Colloid and Interface Science
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1 publication, 2.86%
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Materials Horizons
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1 publication, 2.86%
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Materials Futures
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1 publication, 2.86%
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1 publication, 2.86%
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Materials Today Communications
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1 publication, 2.86%
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Clean Technologies
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1 publication, 2.86%
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Nano Letters
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Nano Letters
1 publication, 2.86%
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Journal of the Electrochemical Society
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1 publication, 2.86%
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Advanced Science
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Advanced Science
1 publication, 2.86%
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ACS Central Science
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ACS Central Science
1 publication, 2.86%
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Chemical Engineering Journal
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Chemical Engineering Journal
1 publication, 2.86%
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Solid State Sciences
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Solid State Sciences
1 publication, 2.86%
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Dalton Transactions
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Dalton Transactions
1 publication, 2.86%
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ACS Applied Nano Materials
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ACS Applied Nano Materials
1 publication, 2.86%
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1 publication, 2.86%
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1 publication, 2.86%
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1 publication, 2.86%
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Materials
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1 publication, 2.86%
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1 publication, 2.86%
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1 publication, 2.86%
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1 publication, 2.86%
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Elsevier
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12 publications, 34.29%
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Wiley
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Wiley
7 publications, 20%
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American Chemical Society (ACS)
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American Chemical Society (ACS)
7 publications, 20%
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Royal Society of Chemistry (RSC)
4 publications, 11.43%
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Multidisciplinary Digital Publishing Institute (MDPI)
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3 publications, 8.57%
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IOP Publishing
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IOP Publishing
1 publication, 2.86%
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The Electrochemical Society
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The Electrochemical Society
1 publication, 2.86%
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