The success of Na-ion batteries is strongly depended on the discovery of suitable electrode materials and the improvement of electrochemical performance. Herein, unique Na₃(TiOPO₄)₂F microspheres assembled by numerous nanosheets were rationally prepared and the Na-storage performance of Na₃(TiOPO₄)₂F was firstly explored in ether-based electrolyte. It is found that the reversible capacity can be as high as 130 mA h g⁻¹ at a current density of 100 mA g⁻¹. Even at a high current density of 750 mA g⁻¹, the capacity can retain 70% after 1000 cycles. The excellent performance is probably originated from the thin/stable/smooth/uniform solid electrolyte interphase (SEI) formed in ether-based electrolyte and the enhanced electron/Na⁺ migration due to the optimized SEI.

Na离子电池的成功在很大程度上取决于合适电极材料的发现和电化学性能的提高。在此，合理地制备了由许多纳米片组装的独特的Na ₃（TiOPO ₄）₂ F微球，并且首先在醚基电解质中探索了Na ₃（TiOPO ₄）₂ F的Na存储性能。已经发现，在100mA g ^-1的电流密度下，可逆容量可以高达130 mA h g ^-1。即使在750 mA g ^-1的高电流密度下，经过1000次循环后，容量可以保留70％。优异的性能可能源于在基于醚的电解质中形成的薄/稳定/光滑/均匀的固体电解质中间相（SEI），以及由于优化的SEI而增强的电子/ Na ⁺迁移。