P2- and P3-KxCoO2 as an electrochemical potassium intercalation host

P2- and P3-KxCoO2 as an electrochemical potassium intercalation host

Reversible and topotactic potassium intercalation of P2- and P3-KxCoO2 electrodes is studied in non-aqueous K cells for the first time. They deliver a highly reversible capacity of 60 mA h g-1 in the voltage range 2.0-3.9 V accompanied by reversible phase transitions including potassium/vacancy orde...

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Veröffentlicht in:Chemical communications (Cambridge, England) England), 2017, Vol.53 (26), p.3693-3696
Hauptverfasser: Hironaka, Yuya, Kubota, Kei, Komaba, Shinichi
Format: Artikel
Sprache:eng
Schlagworte:
Electric potential
Electrodes
Intercalation
Order disorder
Phase transformations
Potassium
Vacancies
Voltage
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Zusammenfassung:Reversible and topotactic potassium intercalation of P2- and P3-KxCoO2 electrodes is studied in non-aqueous K cells for the first time. They deliver a highly reversible capacity of 60 mA h g-1 in the voltage range 2.0-3.9 V accompanied by reversible phase transitions including potassium/vacancy orderings. The electrochemical properties and structural change of P2-KxCoO2 are compared to those of O2-LixCoO2 and P2-NaxCoO2.
ISSN:1359-7345
1364-548X
DOI:10.1039/c7cc00806f