W₁₈O₄₉ is a kind of supercapacitor electrode material with good electrochemical performance and huge market potential. Using W₁₈O₄₉ as electrode material can effectively improve the performance of the supercapacitor and give the device a new intelligence feature.

Under an atmosphere of H₂ or Ar, WS₂ nanotube with small diameter and few layers can be successfully synthesized by heating W₁₈O₄₉ nanowire and sulfur powders at 840°C. During the preparation process, W₁₈O₄₉ nanowire is first prepared from WCl₆ and ethanol.

W₁₈O₄₉ is a kind of non-stoichiometric tungsten oxide (WO_3-x). At present, the researches on the preparation of W₁₈O₄₉ at home and abroad mostly focus on the preparation methods of W₁₈O₄₉ nanowires and nanorods. W₁₈O₄₉ nanorod can be successfully prepared by sputtering method.