Promoting lithium electrodeposition towards the bottom of 3-D copper meshes in lithium-based batteries

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Porous and three-dimensional (3-D) copper (Cu) current collectors were extensively developed to suppress dendritic lithium (Li) growth. However, they suffer from predominant electrodeposition on the surface due to the intensive electric-field on the surface, which results in rapid pore-clogging and thick film deposition. This study demonstrates that the addition of gold nanoparticles (Au NPs) can promote Li deposition at the selected area where the electric field is inferior, which overall controls the density of Li-electrodeposition throughout the 3-D current collector. We showed that the Au NPs with similar to 28 nmol of concentration were sufficient to enhance the Li deposition on the bottom while mitigating the top-surface Li growth. The desired 3-D porous structures containing the Au NPs improved galvanostatic cyclability in symmetric cells and full cells, which confirmed the effect of a small quantity of Au NPs for 3-D porous current collectors.
Publisher
ELSEVIER
Issue Date
2020-10
Language
English
Article Type
Article
Citation

JOURNAL OF POWER SOURCES, v.472, pp.228495

ISSN
0378-7753
DOI
10.1016/j.jpowsour.2020.228495
URI
http://hdl.handle.net/10203/276049
Appears in Collection
CH-Journal Papers(저널논문)
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2020 Sujung Kim et al_J Power Source.pdf(7.61 MB)Download

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