Revealing the Chemical and Structural Evolution of V2O5 Nanoribbons in Lithium-Ion Batteries Using in Situ Transmission Electron Microscopy.

摘要: Layer-structured vanadium oxide (V2O5) nanoribbons with efficient electron transport and short lithium ion insertion lengths are promising candidates for high-performance lithium-ion battery applications. Despite the extensive investigation of its electrochemical properties, chemical structural evolution during lithiation-delithiation processes has rarely been characterized in real time. Herein, behaviors V2O5 probed by situ transmission microscopy. We reveal that exhibit high lithiation speed (0.8 nm/s) without retardation along [010] direction can be fully lithiated to Li3V2O5 phase. Fully reversible retraction is observed these delithiation. The process accompanying coherent strain further simulated our phase field model. simulation results specific rough interface between phases originates from inhomogeneity.