Preparation method of NASICON type solid electrolyte material

The invention belongs to the technical field of sodium metal solid-state batteries, and discloses a preparation method of an NASICON type solid-state electrolyte material. According to the invention, the metal tin and the Na3Zr2Si2PO12 solid electrolyte are tightly combined by adopting a nanosecond pulse laser strategy, so that the interface contact is effectively improved. The tin metal layer is introduced into the sodium metal negative electrode and the Na3Zr2Si2PO12 solid electrolyte, so that the current uniformity can be promoted, the growth of sodium dendrites is inhibited, and good electrochemical performance is shown. The method is simple to operate, can be applied on a large scale, and can inhibit the growth of sodium dendrites and prolong the cycle life of the sodium metal battery. 本发明属于钠金属固态电池的技术领域，公开了一种NASICON型固态电解质材料的制备方法。本发明采用纳秒脉冲激光策略将金属锡与Na3Zr2Si2PO12固态电解质紧密结合，有效地改善界面接触。在钠金属负极和Na3Zr2Si2PO12固态电解质引入锡金属层，可以促进电流均匀，抑制钠枝晶的生长，表现出良好的电化学性能。该方法操作简单、可大规模应用，能够抑制钠枝晶的生长，延长钠金属电池的循环寿命。