Abstract :
[en] Batteries have become essential in tackling global warming and energy security. In 2019, the developers behind the Lithium-ion batteries (LIBs) were awarded the Nobel Prize for chemistry. LIB by having the highest energy density of any such device is considered as the battery of choice for electric vehicles and large-scale smart grids [1, 2]. However, LIBs cannot stand alone to fulfill future needs; therefore, it is urgent to develop new energy storage devices with high safety, lower cost, and high energy density to realize mobiles and large-scale applications. Na-ion batteries (NIBs) are considered to be an alternative to Li-ion batteries owing to the natural abundance of sodium. Indeed, NIBs are expected to become part of the mix of technologies that will meet the challenges of energy storage.
Electrode materials are the most important components in the operation and the performance of LIBs and NiBs. New electrode materials are required to increase the energy density of Li/Na-ion batteries. Iron-based materials with non-toxic metals are good candidates to search for new high-performance electrodes [3, 4, 5]. Indeed, Fe-phosphate-based electrode materials for LIBs and NIBs have been intensively investigated to evaluate the electrochemical performance.
Mössbauer spectroscopy has been used as a powerful tool to investigate the local electronic and structural properties and to elucidate the reaction mechanisms during the electrochemical cycling of the electrode materials for LIBs and NIBs. Indeed, Mössbauer spectroscopy technique could provide a lot of information about the local environment of atoms through electric and magnetic interactions. In this poster, we will show from some selected examples how Mössbauer spectroscopy when used with X-ray diffraction can help to improve the performance of electrode materials for Li/Na-ion batteries.
References:
1- J. Światowska, P. Barboux, Elsevier, (2015), pp. 125-166.
2- A. Mahmoud, I. Saadoune, P.-E. Lippens, M. Chamas, R. Hakkou, J.M. Amarilla, Solid State Ionics, 300 (2017), pp. 175-181
3- T. Jungers, A. Mahmoud, C. Malherbe, F. Boschini, B. Vertruyen, Journal Materials Chemistry, A, 7 (2019), pp. 8226-8233.
4- R. Essehli, A. Alkhateeb, A. Mahmoud, F. Boschini, H. Ben Yahia, R. Amin, I. Belharouak, Journal of Power Sources, 469 (2020), pp. 228417.
5- C. Karegeya, A. Mahmoud, F. Hatert, R. Cloots, B. Vertruyen, P. E. Lippens, F. Boschini, Solid State Ionics, 326 (2018), pp. 18-26.
Acknowledgment:
The authors would like to kindly thank Walloon Region for the financial support.
