Abstract
Nanometric amorphous iron-based oxides of bacterial origin show a great potential as an Fe3+/Fe0 conversion anode material for lithium-ion batteries. By means of in situ Mössbauer spectroscopy, chemical states of Fe ions were examined under the discharge-charge process of the bacterial iron-oxide electrode in a lithium-ion half-cell. As for the first discharge process, the successive reduction of Fe3+ → Fe2+ → Fe0 occurred in the electrode as a function of the cell voltage. While on the charge process, Fe0 in the electrode was oxidized directly to Fe3+ without going through Fe2+.
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Acknowledgements
The authors would like to thank Dr. M. Nakanishi for Raman measurements.
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This article is part of the Topical Collection on Proceedings of the 5th Mediterranean Conference on the Applications of the Mössbauer Effect (MECAME 2019) and 41st Workshop of the French-speaking Group of Mössbauer Spectroscopy (GFSM 2019), Montpellier, France, 19-23 May 2019
Edited by Pierre-Emmanuel Lippens, Yann Garcia, Moulay-Tahar Sougrati and Mira Ristic (†)
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Sakuma, R., Hashimoto, H., Fujii, T. et al. In situ Mössbauer analysis of bacterial iron-oxide nano-particles for lithium-ion battery. Hyperfine Interact 240, 80 (2019). https://doi.org/10.1007/s10751-019-1639-y
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DOI: https://doi.org/10.1007/s10751-019-1639-y