4. G.L. Xu, R. Amine, A. Abouimrane, H.Y. Che, M. Dahbi, Z.F. Ma, I. Saadoune, J. Alami, W.J. Liu Mattis, F. Pan, Z.H. Chen, K. Amine*, "Challenges in developing electrodes, electrolytes, and diagnostics tools to understand and advance Sodium-ion batteries", Adv. Energy Mater. 2018, 1702403.