Preparation And Properties Of Li₁₀GeP₂S₁₂ Based Lithium Ion Solid Electrolyte

For the first time in recent years,Japanese industrial university research team developed a high ionic conductivity of the electrolyte materials-Li₁₀GeP₂S₁₂（LGPS）,the solid electrolyte electrolyte with high ionic conductivity at room temperature,but the study found that the structure stability is poorer.The study shows that the stability of the structure is affected by different ion radius and different valence states except for the influence of van der Waals force on stability.Therefore,this paper aims to improve the structural stability of the electrolyte materials through the following aspects:1.The structure and electrochemical properties of the doped solid electrolyte materials were studied by doping the Ge bits in LGPS materials by using the Si and Sn tetrad elements of the same main group as Ge elements.The doping effect of Si is better than that of Sn,and the ionic conductivity is the largest when the doping ratio is3:7.2.The structure and electrochemical properties of the doped solid electrolyte materials were studied by doping the Ge bits in LGPS materials by using the Ga trivalent element of the adjacent main group of Ge elements.The blue shift of Raman main peak of doped material was observed and the structural stability of the material was improved.3.By using S elements of the same main group elements and the adjacent main group elements S elements O Cl element structure of S element position of LGPS electrolyte material doped with alternative,to study the structure of doped after replacement material stability and electrochemical performance of electrolyte materials.It was found that the doping of Cl improved the stability of the material structure better than that of O.