Spherical Li_1.3Al_0.3Ti_1.7(PO₄)₃ (LATP) solid electrolyte powders are first successfully synthesized by spray-drying and O₂ pressure-controlled calcination processes, and then the targeted ZnO@LATP composite solid electrolytes are gained by coating 2 μm thickness of ZnO layer on the surface of the LATP powders, in which the ZnO layer effectively not only isolates the direct contact between LATP electrolyte sheet and lithium metal electrode, but also regulates the lithium deposition reaction on the surface of the electrolytes, thereby restraining the overgrowth of lithium dendrites to prolong the life span of the assembled coin cell. Specifically, the Li/ZnO@LATP@ZnO/Li symmetric cell enhances the cycle stability without obvious increment of the overpotential compared to the Li/LATP/Li cell at 0.4 mA cm⁻² for 500 h, and the assembled LiCoO₂/ZnO@LATP/Li coin cell can deliver excellent rate and cycling performance, in which the discharge specific capacity is still retained at 118.5 mAh g⁻¹ after 100 cycles at 0.1 C and quickly recovers to 121.2 mAh g⁻¹ when the current is set back to 0.1 C after cycles. Furthermore, the ZnO@LATP solid electrolyte powders after being cycled present integrally spherical shape without any remarkable crack compared with the LATP solid electrolyte powders. Therefore, the investigations may provide an effective strategy to significantly lower the probability of side reactions between LATP electrolyte and lithium metal electrode to promote the electrochemical properties of LATP-based all-solid-state lithium-ion batteries.

_{首次通过喷雾干燥和O 2}成功合成球形Li _1.3 Al _0.3 Ti _1.7 (PO ₄ ) ₃ (LATP)固体电解质粉末通过在 LATP 粉末表面包覆 2 μm 厚的 ZnO 层，ZnO 层不仅有效地隔离了 LATP 电解质片之间的直接接触，还通过压力控制的煅烧过程获得了目标 ZnO@LATP 复合固体电解质和锂金属电极，还可以调节电解质表面的锂沉积反应，从而抑制锂枝晶的过度生长，从而延长组装纽扣电池的寿命。^{具体而言，与 Li/LATP/Li 电池在 0.4 mA cm -2}下持续 500 小时以及组装的 LiCoO ₂相比，Li/ZnO@LATP@ZnO/Li 对称电池增强了循环稳定性而过电位没有明显增加/ZnO@LATP/Li纽扣电池具有优异的倍率和循环性能，在0.1 C下循环100次后放电比容量仍保持在118.5 mAh g ^-1 ，并在电流增加时迅速恢复至121.2 mAh g ^-1循环后设置回 0.1 C。此外，与LATP固体电解质粉末相比，循环后的ZnO@LATP固体电解质粉末呈整体球形，无明显裂纹。因此，该研究可能提供一种有效的策略来显着降低LATP电解质与锂金属电极之间发生副反应的可能性，从而提高基于LATP的全固态锂离子电池的电化学性能。