Design strategies for electrode and electrolyte materials
Na-ion batteries (NIBs) with high-power capability have vast potential as an economical, complementary energy storage device to Li-ion batteries (LIBs). Conceptually, the NIBs behave similarly to their Lithium counterparts; however, unique challenges need to be solved to reach commercial applicability, due to the larger size, the lower potential of sodium and the higher solubility of the Na-based solid electrolyte interface layer.
Our NIB research activities are centred on fundamental research in solving the key problems associated with NIB electrode materials and electrolyte, the solutions of which are then applied to the real-time application in prototype 18650 cells (energy hub, Amiens for prototype cell assembly). The electrode material research involves identification and synthesis of new electrode materials and their optimisation by understanding the structural evolutions during sodium insertion/ de-insertion, hence cycling stability. In parallel, we also investigate electrolyte formulations with different additives and study the electrode-electrolyte interface and its stability by electrochemical and spectroscopic techniques. The NIB research at CSE has so far led to several patents, publications and the development of Na-ion 18650 cells using indigenous electrode and electrolyte materials.
- Jean-Marie Tarascon, Na-ion versus Li-ion Batteries: Complementarity Rather than Competitiveness, Joule. (2020) DOI: 10.1016/j.joule.2020.06.003
- Sathiya Mariyappan, Thomas Marchandier, François Rabuel, Antonella Iadecola, Gwenaëlle Rousse, Anatoly V. Morozov, Artem M. Abakumov, and Jean-Marie Tarascon, The Role of Divalent (Zn2+/Mg2+/Cu2+) Substituents in Achieving Full Capacity of Sodium Layered Oxides for Na-Ion Battery Applications, Chem Mater. 32, 4, 1657–1666 (2020) DOI: 10.1021/acs.chemmater.9b05205
- Guochun Yan, Mariyappan Sathiya, Gwenalle Rousse, Quentin Jacquet, Renald David, Boris Mirvaux, John. W. Freeland and Jean-Marie Tarascon, “ Higher energy and safer sodium ion batteries via an in situ electrochemically made disordered new Na3V2(PO4)2F3 material, Nature Communications. 10 p. 585 (2019) DOI: 10.1038/s41467-019-08359-y
- Guochun Yan and Jean- Marie Tarascon, Electrolyte composition including a specific combination of additives, its use as non-aqueous liquid electrolyte in a Na-ion battery and Na-ion battery including such an electrolyte composition, United States Patent Application 20200243910.