Recent progress in solid-state electrolytes for alkali-ion batteries

Solid-state electrolytes have a lot of advantages, including the inhibition of alkali metal dendrite growth, the elimination of liquid electrolyte leakage, the improvement of safety, the enhancement of energy den- sity and power density, and the potential application in flexible electronics. Therefore, solid-state elec- trolytes have become one of the hottest topics in energy-storage research area. An up-to-date review on solid-state electrolytes is of not only scientific significance but also technological imperative. Here, recent progress in solid-state electrolytes for alkali ion batteries is summarized. Through this comprehen- sive review and the comparison of different solid-state electrolytes, we hope it can give a clear figure of the state-of-art status and the development trend of the future solid-state electrolytes.