posted on 2024-02-11, 17:03authored bySung Il Kim, Taek Dong Chung
Monitoring the dendritic electrodeposition
process is crucial in
various fields such as energy storage devices and sensors. A variety
of in situ dendritic growth monitoring methods have
been developed, especially for battery applications, but they require
specialized cells and equipment and are often invasive, making them
unsuitable for various electrochemical systems and commercial batteries.
To address these challenges, a real-time impedance analysis technique
was used to determine dendritic electrodeposition on microelectrodes.
The “effective size” of the electrodeposit was extracted
from the impedance data, and the dendritic growth was assessed in
real-time by comparing “effective size” to a theoretical
radius assuming hemispherical growth. The technique was validated
using scanning electron microscopy imaging and finite element method
simulation. Initially applied to gold electrodeposition, the method
was extended to zinc electrodeposition, demonstrating potential utilization
for energy storage systems.