Recent progress of W 18 O 49 nanowires for energy conversion and storage

W 18 O 49 nanowires (W 18 O 49 NWs) with unique one-dimension structures and excellent electron/ions transport properties have attracted increasing attention in academia and industry because of their potential applications in many energy-related devices. In the past decades, many research articles related to W 18 O 49 have been published, but there are insufficient review articles focusing on W 18 O 49 NWs. In this review, we present the crystal structure of W 18 O 49 and briefly introduce the synthesis methods and growth mechanism of W 18 O 49 NWs. Moreover, their applications in energy conversion and storage devices are summarized. Finally, the current challenges and opportunities for applying W 18 O 49 NWs are provided. We hope this review can promote the development of W 18 O 49 NWs in energy conversion, storage, and other promising applications.