A team from Tohoku University and Tokyo Tech have addressed one of the major disadvantages of all-solid-state batteries by developing batteries with a low resistance at their electrode/solid electrolyte interface. The fabricated batteries, reported in the journal ACS Applied Materials & Interfaces , showed excellent electrochemical properties that greatly surpass those of traditional and ubiquitous Li-ion batteries. The team achieved an extremely low electrolyte/electrode interface resistance of 7.6 Ω cm 2 in solid-state Li batteries with Li(Ni 0.5 Mn 1.5 )O 4 . Further, the researchers observed spontaneous migration of Li ions from the solid electrolyte to the positive electrode after the formation of the electrolyte/electrode interface. Finally, they were able to demonstrate stable fast charging and discharging of the solid-state Li batteries at a current density of 14 mA/cm 2 . Structure of the thin-film all-solid-state batteries. The batteries were made by stacking various layers via thin-film deposition […]