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-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.
Balke
Nina
N
Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA. balken@ornl.gov
Jesse
Stephen
S
Kim
Yoongu
Y
Adamczyk
Leslie
L
Tselev
Alexander
A
Ivanov
Ilia N
IN
Dudney
Nancy J
NJ
Kalinin
Sergei V
SV