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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Bibliographic Details
Published inChemical communications (Cambridge, England) Vol. 53; no. 26; pp. 3693 - 3696
Main Authors Hironaka, Yuya, Kubota, Kei, Komaba, Shinichi
Format Journal Article
LanguageEnglish
Published 2017
Subjects
Electric potential
Electrodes
Intercalation
Order disorder
Phase transformations
Potassium
Vacancies
Voltage
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Summary: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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1359-7345
1364-548X
DOI:10.1039/c7cc00806f