A kind of preparation method of LiBaLaZrAlREO lithium ion solid electrolytes

The invention discloses a kind of preparation methods of LiBaLaZrAlREO lithium ion solid electrolytes.The method of the present invention is as follows：(1) rare earth oxide is dissolved in acid, prepares rare-earth salt solution；(2) containing barium compound, lanthanum salt, zirconates, aluminium salt and rare-earth salt solution are mixed in water, multicomponent mixed solution is made；(3) pH value for adjusting multicomponent mixed solution, generates precipitation, and filtering obtains presoma, then it is mixed with lithium-containing compound, obtains BaLaZrAlRE (OH) presoma lithium mixture；(4) said mixture is first kept the temperature at 178~190 DEG C, rear 810~990 times calcinations obtain powder；(5) powder is pressed into piece with tablet press machine to be placed in crucible, the upper and lower layer of piece is respectively set powder, and calcination at 1160~1200 DEG C obtains solid electrolyte.Preparation method of the present invention is simple, and synthesis temperature is low, energy saving.