In-Situ Scanning Electron Microscope Observations of Strain-Confined Lithium Nucleation at Electrode/Electrolyte Interfaces in All-Solid-State-Lithium Battery. Issue 1754 (10th June 2015)

• Record Type: Journal Article
• Authors: Motoyama, Munekazu; Ejiri, Makoto; Iriyama, Yasutoshi
• Editors: Barabash, R.; Benning, L.G.; Genc, A.; Kim, Y.; Lereu, A.; Li, D.; Lienert, U.; Liss, K.D.; Ohnuma, M.; Ovchinnikova, O.; Passian, A.; Rimer, J.D.; Tetard, L.; Thundat, T.; Zenobi, R.; Zorba, V.
• Is Part Of: MRS proceedings. Issue 1754:(2015)
• Publication Date: 2015-06-10
• Subjects: electrodeposition, -- Li, -- scanning electron microscopy (SEM); Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/opl.2015.584
• Languages: English
• ISSNs: 0272-9172

Abstract

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.