Journal
CHEMICAL COMMUNICATIONS
Volume 53, Issue 26, Pages 3693-3696Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cc00806f
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Funding
- JSPS KAKENHI [JP 16K14103, JP 16K18242]
- JST A-STEP
- MEXT program Elements Strategy Initiative to Form Core Research Center''
- Grants-in-Aid for Scientific Research [16K14103] Funding Source: KAKEN
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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.
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