Gel polymer electrolyte films based on thermoplastic polyurethane (TPU)/poly(vinylidene fluoride) (PVdF) with and without in situ ceramic fillers (SiO(2) and TiO(2)) are prepared by electrospinning 9 wt% polymer solution at room temperature. The electrospun TPU-PVdF blending membrane with 3% in situ TiO(2) shows a highest ionic conductivity of 4.8 x 10(-3) S cm(-1) with electrochemical stability up to 5.4V versus Li(+)/Li at room temperature and has a high tensile strength (8.7 +/- 0.3 MPa) and % elongation at break (110.3 +/- 0.2). With the superior electrochemical and mechanical performance, it is very suitable for application in polymer lithium ion batteries. (C) 2011 Elsevier B.V. All rights reserved.