The document describes a method for synthesizing tungsten oxide nanorods. Phosphotungstic acid is infiltrated into an alumina membrane template and then calcined to form WO3 nanorods inside the template. The nanorods are characterized using SEM, TEM, AFM, XRD, Raman and IR spectroscopy. SEM and TEM images show the nanorods have a diameter of around 200nm, matching the pore size of the template. XRD and Raman patterns confirm the nanorods have a monoclinic crystalline structure. The nanorods also show superior electrochemical cycling ability compared to bulk WO3 materials.