Sodium titanium hexacyanoferrate (TiHCF, Na0.86Ti0.73 [Fe(CN)6 ]·3H2O) is synthesized by a simple co-precipitation method in this study. Its crystal structure, chemical composition, and geometric/electronic structural information are investigated by X-ray powder diffraction (XRPD), microwave plasma-atomic emission spectroscopy (MP-AES), and X-ray absorption spectroscopy (XAS). The electroactivity of TiHCF as a host for Li-ion and Na-ion batteries is studied in organic electrolytes. The results demonstrate that TiHCF is a good positive electrode material for both Li-ion and Na-ion batteries. Surprisingly, however, the material shows better electrochemical performance as a Na-ion host, offering a capacity of 74 mAh g−1 at C/20 and a 94.5% retention after 50 cycles. This is due to the activation of Ti towards the redox reaction, making TiHCF a good candidate electrode material for Na-ion batteries. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Titanium activation in prussian blue based electrodes for na-ion batteries: A synthesis and electrochemical study / Li, M.; Mullaliu, A.; Passerini, S.; Giorgetti, M.. - In: BATTERIES. - ISSN 2313-0105. - 7:1(2021), pp. 1-11. [10.3390/batteries7010005]

Titanium activation in prussian blue based electrodes for na-ion batteries: A synthesis and electrochemical study

Passerini, S.
;
2021

Abstract

Sodium titanium hexacyanoferrate (TiHCF, Na0.86Ti0.73 [Fe(CN)6 ]·3H2O) is synthesized by a simple co-precipitation method in this study. Its crystal structure, chemical composition, and geometric/electronic structural information are investigated by X-ray powder diffraction (XRPD), microwave plasma-atomic emission spectroscopy (MP-AES), and X-ray absorption spectroscopy (XAS). The electroactivity of TiHCF as a host for Li-ion and Na-ion batteries is studied in organic electrolytes. The results demonstrate that TiHCF is a good positive electrode material for both Li-ion and Na-ion batteries. Surprisingly, however, the material shows better electrochemical performance as a Na-ion host, offering a capacity of 74 mAh g−1 at C/20 and a 94.5% retention after 50 cycles. This is due to the activation of Ti towards the redox reaction, making TiHCF a good candidate electrode material for Na-ion batteries. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1584909
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