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Non - electrochemical Na – deintercalation from O3 NaVO2

Iermakova, Daria and Rozier, Patrick and Chane-Ching, Jean-Yves and Taberna, Pierre-Louis and Simon, Patrice Non - electrochemical Na – deintercalation from O3 NaVO2. (2020) Materials Research Bulletin, 121. 110586. ISSN 0025-5408

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Official URL: https://doi.org/10.1016/j.materresbull.2019.110586

Abstract

Layered oxides have been intensively studied for decades for their characteristics as electrode materials or their physical properties resulting from their structure. In this work, we present a modification of layered oxide NaVO2 via liquid exfoliation technique in water. This oxide has VOx layers with Na ions trapped in between. The goal of this process is to initiate sodium removal from the lattice, which will result in the structural transformations. During this sodium deintercalation, we observed drastic changes in the structure and electrochemical behavior of the oxide. Following water treatment, NaVO2 exhibited nearly linear slopping discharge voltage profile and none of the multi-step reaction potential plateaus were observed, contrary to the profile of the pristine powder. Interestingly, this material structure was able to cycled reversibly within a much larger voltage window, with decent capacity value (ca 160 mA h/g), compare to pristine NaVO2. Thanks to this change of behavior, the active material mean operating voltage was increased.

Item Type:Article
HAL Id:hal-02521034
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Aix-Marseille Université - AMU (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Collège de France (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Paris - ENSCP (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Montpellier - ENSCM (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Institut polytechnique de Grenoble (FRANCE)
Other partners > Sorbonne Université (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Nantes (FRANCE)
Other partners > Université de Picardie Jules Verne (FRANCE)
Other partners > Université de Pau et des Pays de l'Adour - UPPA (FRANCE)
Other partners > Université de Haute Alsace - UHA (FRANCE)
Other partners > Université de Montpellier (FRANCE)
Laboratory name:
Funders:
Agence Nationale de la Recherche - ANR
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Deposited On:27 Mar 2020 10:00

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