PURPOSE: To obtain a chemically stable material with large conductance by constituting the material with a composition expressed by a formula Li1+2xTi2-xMxP3O12, where M is a bivalent metal element and 0<x<0.6.
CONSTITUTION: This material is constituted of a composition expressed by a formula Li1+2xTi2-xMxP3O12, where M is a bivalent element such as Ca, Pb, Ni, Cu, Zn, Co and 0<x<0.6. It has a three-dimensional mesh structure, and many tunnels easily moving Li ions are considered to exist. Tetravalent Ti ions of LiTi2P3O12 are substituted with positive ions with a low valence to increase the concentration of Li ions, thus lithium ion conductivity can be improved by increasing the number of Li ions existing in the tunnels. A chemically stable lithium ion conductive solid electrolyte material with large conductance is obtained.
OTSUKA HIDEAKI
YAMAKI JUNICHI
Next Patent: METHOD FOR PUNCHING SHEET NON-HARDENED COMPOUND AND PUNCHING JIG USED THEREFOR