Mechanochemical Synthesis Of Ag～+ Non-Crystalline Solid Electrolyte

Solid electrolytes are known as fast ion conductors with high ionic conductivity and low electronic conductivity. And low activation energy of ion conduction. In electrochemical energy storage, electronic devices, high-energy density batteries and many other areas of enticing prospect, attracted much attention and interestHigh-energy ball milling technique is an effective method in preparing amorphous,intermediate phase and community compounds . The whole process is carried out at room temperature to avoid the high-temperature cooling link. Crystal material through the process of ultra fine grinding of mechanical force can activate its chemical activity, it normally takes to make the high temperature for the reaction to a lower temperature.Using high-energy ball milling technology to prepare fast ion conductor is possible, and found that this method has the following advantages : (1) material, the whole process of preparation at room temperature for the raw materials and containers of less restrictive, to the broader context of selection system; (2) Preparation of powder samples in nanometer scale, without grinding can be used for all solid sensor batteries and other electrochemical devices, and the melt quenching glass prepared by the need to use before the flowers into fine powder. Moreover, electrode and electrolyte interface improvements, the device efficiency. (3) ground samples in the hope of becoming a large number of defects in ion conduction channel, contribute to the ionic conductivity of the material to improve; (4) possible new high ionic conductivity metastable compounds synthesizedThe Ag2S-SiS2 system glasses are considered to be highly ionic conductivity fast ion conductive materials. However,as raw material SiS2 is moisture absorption decomposition in the air unstable and make the materials prepare greatly inconvenience.In this study , Ag2S,Si and S are used as raw materials.The result showed that 110h ball milling make the samples become non-crystalline,the conductivity of the amorphous samples was about 10-2S m-1 at room temperature.