Abstract

Barbosalite, an iron hydroxy-phosphate belonging to the family of Lazulite has been synthesized using hydrothermal route and its electrochemical property is investigated for the first time with respect to Li-ion batteries. The structure, as determined from single-crystal X-ray diffraction data, built up of undulating layers of FeO6 octahedra, consisting of trimers and PO4 tetrahedral units. Magnetic susceptibility measurements show predominant overall anti-ferromagnetic interactions and room temperature 57Fe Mössbauer spectroscopic studies confirm the mixed 3+ and 2+ oxidation states of Fe in the compound. The compound is stable up to 400°C and undergo facile electrochemical lithium insertion. Galvanostatic charge-discharge studies indicate that up to 0.7 lithium ions per formula unit can be inserted at an average voltage of 2.6 V. The barbosalite phase seems to undergo irreversible phase transition upon lithiation as evident from the powder X-ray diffraction pattern of the reduced and oxidized phases.

Department(s)

Chemistry

Comments

The authors acknowledge the funding from University of Missouri Research Board and Energy Research and Development Center, Missouri S&T. Use of the Advanced Photon Source at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.

Keywords and Phrases

Crystal structure; Electric discharges; Lithium-ion batteries; Magnetic susceptibility; Single crystals; Spectroscopic analysis; X ray diffraction, Electrochemical lithium insertion; Ferro-magnetic interactions; Galvanostatic charge discharges; Hydrothermal routes; Magnetic susceptibility measurements; Powder X ray diffraction; Single crystal x-ray diffraction; Spectroscopic studies, Iron compounds

International Standard Serial Number (ISSN)

0013-4651; 1945-7111

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2019 The Authors, All rights reserved.

Creative Commons Licensing

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.

Publication Date

01 Oct 2019

Included in

Chemistry Commons

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