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Single‐Ion Conducting Polymer Electrolyte for Superior Sodium‐Metal Batteries

Dong, Xu 1; Liu, Xu 1; Li, Huihua 1; Passerini, Stefano 1; Bresser, Dominic 1
1 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)

Abstract:

Sodium-metal batteries (SMBs) are considered a potential alternative to high-energy lithium-metal batteries (LMBs). However, the high reactivity of metallic sodium towards common liquid organic electrolytes renders such battery technology particularly challenging. Herein, we propose a multi-block single-ion conducting polymer electrolyte (SIPE) doped with ethylene carbonate as suitable electrolyte system for SMBs. This novel SIPE provides a very high ionic conductivity (2.6 mS cm$^{−1}$) and an electrochemical stability window of about 4.1 V at 40 °C, enabling stable sodium stripping and plating and excellent rate capability of Na | | Na$_3$V$_2$(PO$_4$)$_3$ cells up to 2 C. Remarkably, such cells provide a capacity retention of about 85 % after 1,000 cycles at 0.2 C thanks to the very high Coulombic efficiency (99.9 %), resulting from an excellent interfacial stability towards sodium metal and the Na$_3$V$_2$(PO$_4$)$_3$ cathode.


Verlagsausgabe §
DOI: 10.5445/IR/1000162655
Veröffentlicht am 29.09.2023
Originalveröffentlichung
DOI: 10.1002/anie.202308699
Scopus
Zitationen: 9
Web of Science
Zitationen: 9
Dimensions
Zitationen: 9
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 1433-7851, 0570-0833, 1521-3773
KITopen-ID: 1000162655
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Angewandte Chemie - International Edition
Verlag John Wiley and Sons
Band 62
Heft 43
Seiten Art.Nr.: e202308699
Vorab online veröffentlicht am 19.09.2023
Schlagwörter Battery, Polymer Electrolyte, Single-Ion Conductor, Sodium Metal
Nachgewiesen in Scopus
Dimensions
Web of Science
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