Revealing the Complex Structural Intergrowth Within Ternary W-Nb-O Oxide

Niobium Oxide (Nb2O5) can form extensive series of ternary compounds with tungsten oxide (WO3) by means of solid-state reaction. Although many kinds of compounds such as WNb12O33, W3Nb14O44, W5Nb16O55 and W8Nb18O69 have been identified more than 60 years ago [1, 2], only recently, it has been found that W5Nb16O55 can intercalate large quantities of Li at a higher charge/discharge rate. This process occurs even when the size of the tungsten niobium oxides are in micrometer scale However, literature lacks of deep structural investigations of these complex oxides and only provide very low spatial resolution information.