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.
Original language | English |
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Pages (from-to) | 3420-3425 |
Number of pages | 6 |
Journal | Nano Letters |
Volume | 10 |
Issue number | 9 |
DOIs | |
State | Published - Sep 8 2010 |
Keywords
- Li-ion battery
- scanning probe microscopy
- thin films