Hydrogen-Bond-Coupling Interfacial Microenvironment Enables Fast Charging of Sodium-Ion Batteries Over a Wide...

With the deepening global energy transition and expanding diversified application scenarios, developing sodium-ion batteries with both fast-charging capability and wide-temperature adaptability has become urgent. However, the core challenge lies in constructing a stable cathode-electrolyte interface (CEI). Traditional strategies overly rely on electrolyte formulation adjustments while neglecting intrinsic material surface engineering. This study innovatively proposes a hydrogen-bond -coupling mechanism between surface hydroxyl groups on the cathode and electrolyte molecules, precisely tuning the interface microenvironment to synergistically resolve conflicts between high/low-temperature interfacial failures. Specifically, hydrogen bonding induces preferential decomposition of fluoroethylene carbonate (FEC) to form a NaF-rich CEI layer that suppresses parasitic reactions, and strengthened Na^⁺-interface interactions significantly reduce ion diffusion energy barriers. Validated on the Na₃V₂(PO₄)₃ cathode, this strategy endows exceptional performance across an ultra-wide temperature range: achieving 80% charging only takes 38.8 s at 60C at room temperature, retaining 84.17% capacity after 1600 cycles at 80 °C and 10C, and operating normally even at an extremely low temperature of -80 °C. This work breaks through conventional interface optimization paradigms, providing a universal new strategy for interface chemical design of high-performance electrode materials.