An ordered mesoporous WO3−X with high electrical conductivity (m-WO3−X) was prepared and evaluated as an anode material for lithium ion batteries (LIBs). Ordered mesoporous tungsten trioxide (m-WO3) with an identical pore structure to that of m-WO3−X and bulk WO3−X (b-WO3−X) was prepared for the comparison purpose. An m-WO3−X electrode exhibited a high reversible capacity (748 mAh g−1, 6.5 Li/W) and a high volumetric capacity (∼1500 mAh cm−3), which is comparable to the Li metal itself (ca. 2000 mAh cm−3). Also, an improved rate capability and a good cyclability were observed in the m-WO3−X electrode when compared with m-WO3 and b-WO3−X electrodes. From electrochemical impedance spectroscopy (EIS) analysis, the advanced anode performance of the m-WO3−X electrode was probably attributed to large ordered mesopores and a high electrical conductivity. Differential scanning …​