Hadrián MONTES-CAMPOS1, Alejandro RIVERA-POUSA1, Trinidad MÉNDEZ-MORALES1, José M. OTERO-MATO1, Carlos Damián RODRÍGUEZ-FERNÁNDEZ1, Kazem ZHOUR2, Luis M. VARELA1
1Grupo de Nanomateriais, Fotónica e Materia Branda, Departamento de Física de Partículas, Universidade de Santiago de Compostela, Campus Vida s/n E-15782, Santiago de Compostela, Spain
2Institute of Physical Chemistry, University of Münster, Corrensstraße 28/30, 48149, Münster, Germany
Among the great variety of applications for Ionic liquids (ILs), one of special relevance nowadays is their use in electrochemical devices. However, ILs are rarely used in its pure form, but they are doped different substances as can be metallic salts.
In this communication we will present novel results for IL systems doped with different metallic salts in the vicinity of a graphene electrode. In particular we used an imidalozium-based ionic liquid with tetrafluoroborate as counterion. To this base system we added Li, Mg, Na, Ca and Al salts. The study focuses on how the different metals modify the electronic transfer between the electrode and the electrolyte. Moreover, we will focus on the changes that the metallic salt produces to the electrochemical window of the ionic liquid, which is of uttermost importance when dealing with electrochemical devices. Finally, we will also provide some results for the optical response of the system. These results could be used to create optical sensors which allow the evaluation in operand of the electrochemical cell. These results will be compared with the ones we previously reported for potassium [1-2].
References:
Zhour, K., Otero-Mato, J. M., Hassan, F. E. H., Fahs, H., Vaezzadeh, M., Lo?pez-Lago, E., E., Gallego L.J., Varela, L. M. Journal of Molecular Liquids, 316, 113803 (2020).
Zhour, K., Otero-Mato, J. M., Hassan, F. E. H., Fahs, H., Vaezzadeh, M., Lo?pez-Lago, E., Gallego L.J., Varela, L. M., Journal of Molecular Liquids, 321, 114759 (2021).
Acknowledgments:
The financial support of the Spanish Ministry of Science and Innovation (PID2021-126148NA-I00) are gratefully acknowledged. Moreover, this work was funded by the Xunta de Galicia 2018/08 and GRC ED431C 2020/10). All these research projects were partially supported by FEDER. A. R.-P. and J.M.O.-M. thank the Spanish Ministry of Education for their FPU grant. T. M. M. acknowledges her contract funded by the pilot program of the USC for the recruitment of distinguished research personnel—call 2021 under the agreement between the USC and the Santander Bank for 2021–2024. H.M.C. thanks the USC for his “Convocatoria de Recualificacio?n do Sistema Universitario Espan?ol-Margarita Salas” postdoctoral grant under the Plan de Recuperacio?n Transformacio?n” program funded by the Spanish Ministry of Universities with European Union’s NextGenerationEU funds. Facilities provided by the Galician Supercomputing Centre (CESGA) are also acknowledged.