Real Space Mapping of Li-Ion Transport in Amorphous Si Anodes with Nanometer Resolution

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-co...

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Bibliographic Details
Published in:Nano letters 2010-01, Vol.10 (9)
Main Authors: Balke, Nina, Jesse, Stephen, Kim, Yoongu, Adamczyk, Leslie A, Tselev, Alexander, Ivanov, Ilia N, Dudney, Nancy J, Kalinin, Sergei V
Format: Article
Language:English
Subjects:
ANODES
BATTERY CHARGING
ELECTRODES
ENERGY STORAGE
MICROSCOPY
MICROSTRUCTURE
RESOLUTION
SILICON
STRAINS
THIN FILMS
TRANSPORT
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Summary: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.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl101439x