Solution combustion synthesis of NaFePO4 and its electrochemical performance

• Published in: Chinese journal of physics (Taipei) Vol. 69; pp. 134 - 142
• Main Authors: Yadav, S.N., Rajoba, S.J., Kalubarme, R.S., Parale, V.G., Jadhav, L.D.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2021
• Subjects: Cathode material; combustion; maricite NaFePO4; sodium-ion battery; Cathode material; combustion; maricite NaFePO4; sodium-ion battery
• ISSN: 0577-9073
• DOI: 10.1016/j.cjph.2020.11.020

•Thermodynamically stable maricite-NaFePO4is prepared by combustion process.•For the first time, Mericite-NaFePO4 is demonstrated to store Na ions reversibly.•The NaFePO4delivers a discharge capacity of 28 mAhg−1. In the current research work, submicron size single-phase NaFePO4 (NFP) nanoparticles are successfully synthesized using the solution combustion method. The calcination of as synthesized NFP powder is done at 700 °C for 5h in the air atmosphere and it shows the maricite phase crystallized into an orthorhombic structure with a surface area of 9.29 m2/g.  The intermolecular vibrations of the (PO4)3− group are identified in the FTIR spectra. The XPS spectra of NFP confirms the presence of Fe and P in +2 and +5 oxidation states, respectively. The coin cell assembled using calcined NFP powder shows a pair of redox peaks at 2.42 and 2.69 V vs. Na/Na+ owing to Na-ion insertion and extraction. NFP material delivers a specific capacity of 28 mAh/g at 0.1 C with 92% capacity retention after 35 cycles. [Display omitted]