Real‐time Observation of Deep Lithiation of Tungsten Oxide Nanowires by In Situ Electron Microscopy

• DOI: 10.1002/ange.201508112
• Publication Date: 2015-10-17T12:00:16Z
• Authors: Kuo Qi; Jiake Wei; Muhua Sun; Qianming Huang; Xiaomin Li; Zhi Xu; Wenlong Wang; Xuedong Bai
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract An in‐depth mechanistic understanding of the electrochemical lithiation process tungsten oxide (WO 3 ) is both fundamental interest and relevant for potential applications. One most important features WO formation chemically flexible, nonstoichiometric Li x , known as bronze. Herein, we achieved real‐time observation deep single‐crystal nanowires by constructing in situ transmission electron microscopy (TEM) cells. As revealed nanoscale imaging, diffraction, spectroscopy, it shown that rapid leads to highly disordered near‐amorphous phases, but with no detectable traces elemental W segregated 2 O phase formation. These results highlight remarkable chemical structural flexibility phases accommodating reaction.