Anion-exchange fluorinated ion conductors for stable high-voltage lithium battery (opens in new tab)

The development of high-energy all-solid-state batteries is critically hindered by the electrochemical instability of solid electrolytes against high-voltage oxide positive electrodes. While fluorination is a promising strategy to enhance electrolyte stability, conventional methods are ineffective, resulting in insufficient fluorine content and a debilitating trade-off with ionic conductivity. Here, we report a solid-state anion-exchange strategy that overcomes these limitations by producing ...