Facile method to synthesize Na-enriched Na1+xFeFe(CN)6 frameworks as cathode with superior electrochemical performance for sodium-ion batteries

Authors

Weijie Li, University of WollongongFollow
Shulei Chou, University of WollongongFollow
Jiazhao Wang, University of WollongongFollow
Yong-Mook Kang, Kongju National University, Dongguk University
Jianli Wang, University of WollongongFollow
Yong Liu, Central South UniversityFollow
Qinfen Gu, Australian Synchrotron Company
Hua-Kun Liu, University of WollongongFollow
S X. Dou, University of WollongongFollow

RIS ID

98738

Publication Details

Li, W., Chou, S., Wang, J., Kang, Y., Wang, J., Liu, Y., Gu, Q., Liu, H. & Dou, S. (2015). Facile method to synthesize Na-enriched Na_1+xFeFe(CN)₆ frameworks as cathode with superior electrochemical performance for sodium-ion batteries. Chemistry of Materials, 27 (6), 1997-2003.

Abstract

Different Na-enriched Na_1+xFeFe(CN)₆ samples can be synthesized by a facile one-step method, utilizing Na₄Fe(CN)₆ as the precursor in a different concentration of NaCl solution. As-prepared samples were characterized by a combination of synchrotron X-ray powder diffraction (S-XRD), Mössbauer spectroscopy, Raman spectroscopy, magnetic measurements, thermogravimetric analysis, X-ray photoelectron spectroscopy, and inductively coupled plasma analysis. The electrochemical results show that the Na_1.56Fe[Fe(CN)₆]·3.1H₂O (PB-5) sample shows a high specific capacity of more than 100 mAh g^-1 and excellent capacity retention of 97% over 400 cycles. The details structural evolution during Na-ion insertion/extraction processes were also investigated via in situ synchrotron XRD. Phase transition can be observed during the initial charge and discharge process. The simple synthesis method, superior cycling stability, and cost-effectiveness make the Na-enriched Na_1+xFe[Fe(CN)₆] a promising cathode for sodium-ion batteries.

Grant Number

ARC/LP120200432

Additional Grant Number

http://purl.org/au-research/grants/arc/LP120200432