PEO/Li
<em>xV
2-δO
4-δ nanocomposite was prepared by the solution intercalation method. Powder X-ray diffraction, differential scanning calorimetry and infrared spectrum analysis show that PEO chains intercalate Li
<em>xV
2-δO
4-δ galleries and expand the lattice lamella by 0.42 nm. The movement ability of PEO is also restricted.