Lithium Phosphate Thin Film, Method for Manufacturing the Same and Application Thereof

Abstract

An electrochemical method for manufacturing a lithium phosphate (Li 3 PO 4 ) thin film includes preparing an electroplating solution and forming the lithium phosphate thin film on a conductive substrate under suitable conditions. The electroplating bath includes about 10 −2 M to about 10 −1 M lithium ion and about 10 −2 M to about 1 M monohydrogen phosphate ion (HPO 4 2− ) or dihydrogen phosphate ion (H 2 PO 4 − ).

1 . A lithium phosphate thin film having a conductivity of at least about 5*10 −8  S/cm at 23-27° C. 
     
     
         2 . The lithium phosphate thin film of  claim 1 , wherein the lithium phosphate thin film has a thickness of at least about 0.5-1.5 μm. 
     
     
         3 . The lithium phosphate thin film of  claim 1 , wherein the lithium phosphate thin film comprising a plurality of iron ions doped therein. 
     
     
         4 . The lithium phosphate thin film of  claim 3 , wherein the molar ratio of lithium to iron is about 12:1.