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In-Situ Scanning Electron Microscope Observations of Strain-Confined Lithium Nucleation at Electrode/Electrolyte Interfaces in All-Solid-State-Lithium Battery

Published online by Cambridge University Press:  10 June 2015

Munekazu Motoyama ,
Makoto Ejiri  and
Yasutoshi Iriyama
Munekazu Motoyama
Affiliation:
Department of Materials, Physics and Energy Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan JST-ALCA, 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan
Makoto Ejiri
Affiliation:
Department of Materials, Physics and Energy Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan JST-ALCA, 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan
Yasutoshi Iriyama
Affiliation:
Department of Materials, Physics and Energy Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan JST-ALCA, 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075, Japan
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Abstract

We have studied electrochemical Li deposition/dissolution processes at amorphous solid electrolyte (LiPON) interfaces with 30-nm-thick-Cu-current collectors at different current densities by in-situ scanning electron microscopy (SEM). When the current density is smaller than 300 μA cm−2, Li islands continue to grow under a Cu film without coalescing with their neighbors. Consequently, they produce small cracks in the Cu film leading to isolated Li rod growth from the cracks. On the other hand, a current density of 1.0 mA cm−2 provokes the nucleation of Li islands with a higher number density. They rapidly coalesce under a Cu film in all lateral directions before cracking the Cu film. High current density conditions therefore suppress Li rod growths.

Keywords

electrodepositionLiscanning electron microscopy (SEM)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1754: Symposium OO/PP/QQ/TT – State-of-the-Art Developments in Materials Characterization , 2015 , pp. 25 - 30
Copyright
Copyright © Materials Research Society 2015 

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References

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