Raphaële J. Clément presents Materials design for competitive sodium-ion batteries at IWAM 2023 скачать в хорошем качестве

Raphaële J. Clément presents Materials design for competitive sodium-ion batteries at IWAM 2023

Materials design for competitive sodium-ion batteries While lithium (Li)-ion batteries have become ubiquitous in our daily lives, rapid growth in demand has driven the development of lower cost and more sustainable battery chemistries. Commercial Li-ion cathodes comprise nickel and cobalt, whose prices have surged over the last couple of years, and concerns about the reliability of lithium, cobalt, and natural graphite (used as anode) supply chains, and risks associated with their geopolitical concentrations, are rising. Sodium(Na)-based batteries offer an attractive alternative to the lithium technology, particularly if combined with Earth-abundant redox-active species such as manganese and iron. Yet, viable sodium-ion cathode materials have proven elusive, and a paradigm shift in the development of competitive systems hinges on the investigation of structures that depart from those explored for lithium. In this talk, I will present our recent work exploring new chemistries and crystal structures for Na-ion cathodes, as well as new solid electrolytes to enable high energy density all-solid-state batteries. In a first part, I will discuss our recent work on alluaudite-type Na-ion cathodes, where we have used principles of solid-state chemistry to unlock the redox activity of manganese-based vanadate alluaudites. [1] I will also review our work on weberite iron fluoride cathodes, which reveals the intrinsic metastability and polymorphism of this structural family, and effects on electrochemical performance. [2] In a second part, I will present our contributions to the development of high conductivity Na solid electrolytes within the rocksalt halide family of compounds. [3—5] There, we show that Na+ transport depends sensitively on planar defects and polymorphism, and can be increased through amorphization. Overall, our results unravel new rules for the rational design of Na-ion battery materials. [1] Wu, V., Giovine, R., Foley, E., Finzel, J., Balasubramanian, M., Sebti, E., Mozur, E., Kwon, A., Clément, R., Chem. Mater., 34(9), 4088-4103 (2022). [2] Foley, E., Wu, V., Jin, W., Evans, H., Cui, W., Yoshida, E., Manche, A., Clément, R. J., in preparation. [3] Wu, E., Banerjee, S., Tang, H., Richardson, P., Doux, J.-M., Qi, J., Zhu, Z., Grenier, A., Li, Y., Zhao, E., Deysher, G., Sebti, E., Nguyen, H., Stephens, R., Verbist, G., Chapman, K., Clément, R., Banerjee, A., Meng, Y. S., Ong, S. P., Nat. Commun., 12(1), 1256 (2021). [4] Sebti, E., Qi, J., Richardson, P., Ridley, P., Wu, E., Banerjee, S., Giovine, R., Cronk, A., Ham, S.-Y., Meng, Y. S., Ong, S. P., Clément, R., J. Mater. Chem. A, 10 (40), 21565-21578 (2022). [5] Ridley, P., Nguyen, L. H. B., Sebti, E., Duong, G., Chen, Y.-T., Sayahpour, B., Cronk, A., Deysher, G., Ham, S.-Y., Oh, J. A. S., Wu, E., Tan, D., Doux, J.-M., Clément, R., Jang, J., Meng, Y. S., submitted.