Redox Reactions in Prussian Blue Analogue Films with Fast Na⁺ Intercalation

• Masamitsu Takachi

• Tomoyuki Matsuda

• Yutaka Moritomo

Abstract

Electronic state of cobalt and manganese Prussian blue analogues were systematically investigated against Na + intercalation by means of the infrared and X-ray absorption spectroscopies. The spectroscopies revealed that 3.8 and 3.4 V plateaus in the discharge curve of Na x Co[Fe(CN) 6 ] 0.90 2.9H 2 O (denoted as NCF90) are ascribed to the reduction processes of Fe 3+ and Co 3+ , respectively. On the other hand, 3.6 and 3.2 V plateaus of Na x Mn[Fe(CN) 6 ] 0.83 3.5H 2 O (NMF83) are ascribed to the reduction processes of Mn 3+ and Fe 3+ , respectively. We found that the film electrodes with a thickness of 1.1 µm exhibit fast Na + intercalations: the discharge capacity at 60 C of the NCF90 (NFM83) film was 90% (45%) of the open-circuit-voltage (OCV) value. Thus, Prussian blue analogue films are promising cathode candidates for sodium-ion secondary batteries.

Journal

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 52 (9R), 090202-, 2013-08-06

  IOP Publishing

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1360566399841095168
• NII Article ID: 210000142777
• DOI: 10.7567/jjap.52.090202
• ISSN: 13474065
• ISSN: 00214922
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.52.090202
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.52.090202/pdf
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