We present a cross-linked gel polymer electrolyte for lithium-ion polymer batteries that can be easily synthesised without any initiators. The gel polymer electrolyte has a high ionic conductivity comparable to a liquid electrolyte, as well as favourable interfacial characteristics between the electrodes and the electrolyte during cycling. The lithium-ion polymer batteries assembled with cross-linked gel polymer electrolyte exhibit improved capacity retention and good rate capability. (C) 2013 Elsevier B.V. All rights reserved.