Real Space Mapping of Li-Ion Transport in Amorphous Si Anodes with Nanometer Resolution
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- 30 July 2010
- journal article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 10 (9), 3420-3425
- https://doi.org/10.1021/nl101439x
Abstract
The electrical bias driven Li-ion motion in silicon anode materials in thin film battery heterostructures is investigated using electrochemical strain microscopy (ESM), which is a newly developed scanning probe microscopy based characterization method. ESM utilizes the intrinsic link between bias-controlled Li-ion concentration and molar volume of electrode materials, providing the capability for studies on the sub-20 nm scale, and allows the relationship between Li-ion flow and microstructure to be established. The evolution of Li-ion transport during the battery charging is directly observed.Keywords
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