Summary:

The invention discloses an air-stabilized sulfide sodium ion solid electrolyte and a preparation method thereof, the chemical formula of the sulfide sodium ion solid 

electrolyte is Na4-xSn1-xMxS4-yOy, wherein M is at least one of P, As, Sb, 0.05≤x≤0.5, 0≤y≤0.5. The crystal structure of the sulfide sodium ion solid electrolyte 

has an I41/acd space group, with isolated [Sn/M]4 tetrahedra forming the skeleton and sodium ions filling five unoccupied crystal positions. Sodium sulfide ion solid 

electrolytes are used in the preparation of all-solid-state batteries. The solid electrolyte material of the present invention has high ionic conductivity, and is stable

 in the air, and then solves the technical problem that the sulfide solid electrolyte is very sensitive to the air in the prior art, and it is easy to generate sulfide 

hydrogen when exposed to the air and causes the solid electrolyte to fail at the same time, and the application of the sulfide solid electrolyte is limited, and the cost 

of making the battery is increased.

Link: http://epub.cnipa.gov.cn/patent/CN108390094A?8kt2YOWWXQBD=1667822880169