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Long life and high-rate Berlin green FeFe(CN)6 cathode material for a non-aqueous potassium-ion battery

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Abstract

A high-quality sized FeFe(CN)6 was synthesized as a cathode material for a non-aqueous potassium-ion battery. The electrode delivered a reversible capacity of 124 mA h g−1 at the current rate of 0.5C and still retained a reversible capacity of 93 mA h g−1 after 500 cycles at 5C with a columbic efficiency of 100%. Structural evolution and redox couples of low and high spin FeIII/FeII were investigated by ex situ X-ray diffraction, Mössbauer spectroscopy, and X-ray photoelectric spectroscopy. The negligible volume change during the electrochemical process should be responsible for the excellent cyclic stability.

Graphical abstract: Long life and high-rate Berlin green FeFe(CN)6 cathode material for a non-aqueous potassium-ion battery

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Publication details

The article was received on 15 Jan 2017, accepted on 06 Mar 2017, published on 07 Mar 2017 and first published online on 07 Mar 2017


Article type: Communication
DOI: 10.1039/C7TA00484B
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Long life and high-rate Berlin green FeFe(CN)6 cathode material for a non-aqueous potassium-ion battery

    Z. Shadike, D. Shi, Tian-Wang, M. Cao, S. Yang, J. Chen and Z. Fu, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA00484B

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