We conduct a new in-situ measurement using biased scanning probe microscopy (SPM), to induce Li+ diffusion within a all-solid-state thin film Li-ion battery (TiO2/LiPON/LiNi1/3Co1/3Mn1/3O2), while monitoring the local cyclic changes of topography, phase and volume of TiO2 anode at nanoscale with the same SPM tip. Results clear show that the reversible topographical change as the volume expansion/contraction is related to the cyclic Li+ insertion/extraction induced by local bias-induced electrical field. This phenomenon is analogues to charge/discharge behavior observed in traditional EC-AFM, indicating that the local cyclic bias can be used for modeling the charge/discharge processes in Li-ion battery. In addition, combining simultaneous measurements of phase and amplitude images, high spatially resolved mapping of �nano-spots� which are related to Li-ion distribution and trapping can be obtained, providing a new insight into the mechanism of ionic transport and the distribution of diffusion preferred paths in a real all-solid-state Li-ion battery.

In situ study on cyclic changes of topography, phase and volume of TiO<sub>2</sub> anode in all-solid-state thin film Li-ion microbattery by biased scanning probe microscopy

243rd National Meeting (2012)

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In situ study on cyclic changes of topography, phase and volume of TiO2 anode in all-solid-state thin film Li-ion microbattery by biased scanning probe microscopy

In situ study on cyclic changes of topography, phase and volume of TiO₂ anode in all-solid-state thin film Li-ion microbattery by biased scanning probe microscopy