Batteries, Vol. 7, Pages 5: Titanium Service in Prussian Blue Based Electrodes for Na-ion Batteries: A Synthesis and Electrochemical Study
Batteries doi: 10. 3390/batteries7010005
Writers: Min Li Angelo Mullaliu Stefano Passerini Marco Giorgetti
Sodium titanium hexacyanoferrate (TiHCF, Na0. 86Ti0. 73[Fe(CN)6]& amp; middot; 3H2O) is synthesized by a simple co-precipitation method in this research. 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 researched 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& amp; minus; one at C/20 and a 94. 5% retention after 50 series. This is due to the activation of Ti in the direction of the redox reaction, making TiHCF a good candidate electrode materials for Na-ion batteries.