High-Voltage Cr4+/Cr3+ Redox Couple in Polyanion Compounds

Higher-voltage operation is crucial to increase the energy density of rechargeable batteries. Here we explored the Cr4+/Cr3+ redox couple in a polyanion framework for a high-voltage sodium battery cathode. An archetypal NASICON-phase Na3Cr2(PO4)3 exhibited a reversible redox activity at ca. 4.5 V ve...

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Veröffentlicht in:	ACS applied energy materials 2018-03, Vol.1 (3), p.928-931
Hauptverfasser:	Kawai, Kosuke, Zhao, Wenwen, Nishimura, Shin-ichi, Yamada, Atsuo
Format:	Artikel
Sprache:	eng ; jpn
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Beschreibung
Zusammenfassung:	Higher-voltage operation is crucial to increase the energy density of rechargeable batteries. Here we explored the Cr4+/Cr3+ redox couple in a polyanion framework for a high-voltage sodium battery cathode. An archetypal NASICON-phase Na3Cr2(PO4)3 exhibited a reversible redox activity at ca. 4.5 V versus Na/Na+, offering further scope for searching new high-voltage materials based on Cr4+/Cr3+ redox couple.
ISSN:	2574-0962 2574-0962
DOI:	10.1021/acsaem.7b00105