In this articles, Fe2(MoO4)3 was prepared by precipitation method and used as cathode materials for sodium-ion batteries. The crystalline structure of the sample was characterized by a powder X-ray diffraction spectroscopy (XRD), the morphologies of the sample were observed by the field emission scanning electron microscopy (SEM), the binding state of elements in sample was analyzed by X-ray photoelectron spectroscopy (XPS). | Vietnam Journal of Chemistry, International Edition, 54(4): 424-428, 2016 DOI: Synthesis and electrochemical performance of Fe2(MoO4)3 cathode for sodium-ion batteries Nguyen Van Tu1,2*, Phan Quang Quy3 1 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, P. R. China 2 Institute for Chemistry and Materials, Military Institute of Science and Technology 3 Hanoi University of Industry Received 29 January 2016; Accepted 12 August 2016 Abstract In this articles, Fe2(MoO4)3 was prepared by precipitation method and used as cathode materials for sodium-ion batteries. The crystalline structure of the sample was characterized by a powder X-ray diffraction spectroscopy (XRD), the morphologies of the sample were observed by the field emission scanning electron microscopy (SEM), the binding state of elements in sample was analyzed by X-ray photoelectron spectroscopy (XPS). The electrochemical properties were investigated in CR2025 coin type cell with a metal sodium foil as the anode electrode. As the charge/discharge current density at C, the initial specific capacity of Fe 2(MoO4)3 is mAhg-1, and remains mAhg-1 after 15 cycles. Keywords. NASICON, iron molybdate, sodium ion battery, cathode material. 1. INTRODUCTION Sodium-ion batteries (SIBs) are the most promising alternatives to lithium-ion batteries due to the low cost and abundance of sodium element in the earth. The chemical similarity of sodium ion toward lithium ion enables some electrode materials used in Li-ion batteries (LIBs) to be applied for SIBs. Specialty for the application in the large-scale energy storage for smart grid and solar/wind energy, and the problem of low-cost would be a big challenge [1]. Since the 1980s, many cathode materials for sodium-ion battery have been identified, such as NaxMO2 [2], NaFePO4 [3], MF3 [4], NaMnPO4 .
