The new electrolyte design principles to suppress the SEI dissolution for highly stable high-voltage sodium-ion batteries introduced by the researchers. a, In the conventional electrolyte, SEI dissolution leads to continuous side reactions and irreversible capacity loss. b. In the low-solvation electrolyte, SEI dissolution is suppressed and the cycle life of batteries can be improved. Credit: Jin et al.
In years to come, sodium-ion batteries (NIBs) could potentially be a great alternative to current energy storage systems. Despite their advantages, including the abundance of sodium and a potentially long cycle life, these sodium-based batteries are often less stable than lithium-based batteries, due to the instability of the solid-electrolyte interphase (SEI), a passivation layer that…