We report the preparation and characterization of hybrid inorganic-organic membranes based on NASICON-type Li1 + xAlxGe2 (- x)(PO4)(3) (LAGP) as the fast ion conducting ceramic and fast ionic polymeric solid electrolyte PEO: PVDF:LiBF4 for possible application as Li anode protecting membrane in lithium air batteries. The resulting membranes showed enhanced conductivity of 10(-4) S cm(-1) in combination with improved mechanical flexibility when compared to the ceramic along with higher stability in aqueous solutions in comparison with pure polymer. (C) 2013 Elsevier B.V. All rights reserved.