Real space mapping of Li-ion transport in amorphous Si anodes with nanometer resolution.
basic_science · Level V
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- Record sourced from PubMed, PMID 20672826.
- Also identified by DOI 10.1021/nl101439x.
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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.