Highly flexible, paper-like, free-standing V2O5 and V2O5–polypyrrole (PPy) films were prepared via the
vacuum filtration method. The films are soft, lightweight, and mechanically robust. The
electrochemical performance of the free-standing pure V2O5 electrode was improved by incorporating
conducting polypyrrole. A bendable cell with a novel design was fabricated, consisting of a freestanding
V2O5–PPy cathode film, gel electrolyte, and a lithium foil anode. The cell was tested under
repeated bending conditions for several cycles. The results show that the battery performance of the
repeatedly bent cell was similar to that of the conventional cell.