Polyaniline nanofibres of high conductivity were prepared by interfacial polymerization. The polyaniline nanofibres were used as an active cathode material in lithium-polymer cells. Gel polymer electrolyte (GPE) based on the porous poly(vinylidene-co-hexafluoropropylene) P(VdF-co-HFP), membrane was prepared and used as an electrolyte material in assembling Li/GPE/polyaniline cells. The electrochemical properties of the cells were investigated by cyclic voltammetry and charge-discharge cycling tests. The cell delivered a maximum discharge capacity of 69 mAh g(-1) at 20th cycle and 48 mAh g(-1) at 100th cycle with 97% coulombic efficiency. (c) 2006 Elsevier B.V. All rights reserved.