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Title: Dendrite-Free Lithium Deposition with Self-Aligned Nanorod Structure

Suppressing lithium (Li) dendrite growth is one of the most critical challenges for the development of Li metal batteries. We recently proposed a novel self-healing electrostatic shield (SHES) mechanism which can fundamentally change the Li deposition behavior and lead to the growth of dendrite-free Li films. Here, we report for the first time that the as-deposited dendrite-free Li films grown with assistance of SHES additive are actually composed of highly-aligned and compacted Li nanorods with hemispherical tips. Both surface and cross sectional morphology evolution of the Li films during repeated Li deposition/stripping processes were systematically investigated. A new model has been established to explain the formation and evolution of the Li nanorods. A fundamental understanding on the internal structure and evolution of Li metal films may lead to new approaches to stabilize the long term cycling stability of Li metal anode.
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Publication Date:
OSTI Identifier:
Report Number(s):
48164; KC0208010
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nano Letters, 14(12):6889-6896
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org:
Country of Publication:
United States
Electrodeposition; Li dendrite; nanorods; Dendrite-free; Li metal anode; Environmental Molecular Sciences Laboratory