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Electrochemical Sodium Storage in Hard Carbon Powder Electrodes Implemented in an Improved Cell Assembly: Insights from In‐Situ and Ex‐Situ Solid‐State NMR

Šić, Edina ; Schutjajew, Konstantin ; Haagen, Ulrich ; Breitzke, Hergen ; Oschatz, Martin ; Buntkowsky, Gerd ; Gutmann, Torsten (2024)
Electrochemical Sodium Storage in Hard Carbon Powder Electrodes Implemented in an Improved Cell Assembly: Insights from In‐Situ and Ex‐Situ Solid‐State NMR.
In: ChemSusChem : Chemistry, Sustainability, Energy, Materials, 2024, 17 (4)
doi: 10.26083/tuprints-00027097
Artikel, Zweitveröffentlichung, Verlagsversion

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Kurzbeschreibung (Abstract)

In this work, we report on an improved cell assembly of cylindrical electrochemical cells for ²³Na in‐situ solid‐state NMR (ssNMR) investigations. The cell set‐up is suitable for using powder electrode materials. Reproducibility of our cell assembly is analyzed by preparing two cells containing hard carbon (HC) powder as working electrode and sodium metal as reference electrode. Electrochemical storage properties of HC powder electrode derived from carbonization of sustainable cellulose are studied by ssNMR. ²³Na in‐situ ssNMR monitors the sodiation/desodiation of a Na|NaPF₆|HC cell (cell 1) over a period of 22 days, showing high cell stability. After the galvanostatic process, the HC powder material is investigated by high resolution ²³Na ex‐situ MAS NMR. The formation of ionic sodium species in different chemical environments is obtained. Subsequently, a second Na|NaPF₆|HC cell (cell 2) is sodiated for 11 days achieving a capacity of 220 mAh/g. ²³Na ex‐situ MAS NMR measurements of the HC powder material extracted from this cell clearly indicate the presence of quasi‐metallic sodium species next to ionic sodium species. This observation of quasi‐metallic sodium species is discussed in terms of the achieved capacity of the cell as well as of side reactions of sodium in this electrode material.

Typ des Eintrags: Artikel
Erschienen: 2024
Autor(en): Šić, Edina ; Schutjajew, Konstantin ; Haagen, Ulrich ; Breitzke, Hergen ; Oschatz, Martin ; Buntkowsky, Gerd ; Gutmann, Torsten
Art des Eintrags: Zweitveröffentlichung
Titel: Electrochemical Sodium Storage in Hard Carbon Powder Electrodes Implemented in an Improved Cell Assembly: Insights from In‐Situ and Ex‐Situ Solid‐State NMR
Sprache: Englisch
Publikationsjahr: 18 Juni 2024
Ort: Darmstadt
Publikationsdatum der Erstveröffentlichung: 22 Februar 2024
Ort der Erstveröffentlichung: Weinheim
Verlag: Wiley-VCH
Titel der Zeitschrift, Zeitung oder Schriftenreihe: ChemSusChem : Chemistry, Sustainability, Energy, Materials
Jahrgang/Volume einer Zeitschrift: 17
(Heft-)Nummer: 4
Kollation: 8 Seiten
DOI: 10.26083/tuprints-00027097
URL / URN: https://tuprints.ulb.tu-darmstadt.de/27097
Zugehörige Links:
Herkunft: Zweitveröffentlichung DeepGreen
Kurzbeschreibung (Abstract):

In this work, we report on an improved cell assembly of cylindrical electrochemical cells for ²³Na in‐situ solid‐state NMR (ssNMR) investigations. The cell set‐up is suitable for using powder electrode materials. Reproducibility of our cell assembly is analyzed by preparing two cells containing hard carbon (HC) powder as working electrode and sodium metal as reference electrode. Electrochemical storage properties of HC powder electrode derived from carbonization of sustainable cellulose are studied by ssNMR. ²³Na in‐situ ssNMR monitors the sodiation/desodiation of a Na|NaPF₆|HC cell (cell 1) over a period of 22 days, showing high cell stability. After the galvanostatic process, the HC powder material is investigated by high resolution ²³Na ex‐situ MAS NMR. The formation of ionic sodium species in different chemical environments is obtained. Subsequently, a second Na|NaPF₆|HC cell (cell 2) is sodiated for 11 days achieving a capacity of 220 mAh/g. ²³Na ex‐situ MAS NMR measurements of the HC powder material extracted from this cell clearly indicate the presence of quasi‐metallic sodium species next to ionic sodium species. This observation of quasi‐metallic sodium species is discussed in terms of the achieved capacity of the cell as well as of side reactions of sodium in this electrode material.

Alternatives oder übersetztes Abstract:
Alternatives AbstractSprache

An improved cell assembly for preparation of stable Na/Na⁺ electrochemical cell systems is presented which is appropriate for investigation of powder electrodes applying in-situ solid-state NMR studies. Insights into the electrochemical storage of Hard Carbon powder electrodes are provided combining in-situ and ex-situ solid-state ²³Na NMR techniques.

Englisch
Freie Schlagworte: solid-state NMR, electrochemical cells, sodium;hard carbon, in-situ characterization
ID-Nummer: Artikel-ID: e202301300
Status: Verlagsversion
URN: urn:nbn:de:tuda-tuprints-270976
Zusätzliche Informationen:

This article also appears in: Sodium Ion Batteries (ICNaB 2022)

Sachgruppe der Dewey Dezimalklassifikatin (DDC): 500 Naturwissenschaften und Mathematik > 540 Chemie
Fachbereich(e)/-gebiet(e): 07 Fachbereich Chemie
07 Fachbereich Chemie > Eduard Zintl-Institut
07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie
Hinterlegungsdatum: 18 Jun 2024 12:42
Letzte Änderung: 19 Jun 2024 08:54
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