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ALD Protection of Li‐Metal Anode Surfaces – Quantifying and Preventing Chemical and Electrochemical Corrosion in Organic Solvent
Author(s) -
Lin ChuanFu,
Kozen Alexander C.,
Noked Malachi,
Liu Chanyuan,
Rubloff Gary W.
Publication year - 2016
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201600426
Subject(s) - x ray photoelectron spectroscopy , materials science , foil method , atomic layer deposition , electrochemistry , oxide , chemical engineering , inorganic chemistry , scanning electron microscope , layer (electronics) , degradation (telecommunications) , analytical chemistry (journal) , nanotechnology , chemistry , electrode , metallurgy , organic chemistry , composite material , engineering , telecommunications , computer science
Chemical and electrochemical instability of the Li metal interface with organic solvent has been a major impediment to use of Li‐metal anodes for next‐generation batteries. Here the character of Li surface degradation and the application of atomic layer deposition (ALD) as a protection layer to suppress the degradation are addressed. Using standard Li foil samples in organic solvent with and without in situ deposited ALD Al 2 O 3 protective layers, results from in situ atomic force microscopy, mass spectrometry (including differential electrochemical mass spectrometry), X‐ray Photoelectron Spectroscopy (XPS), and ex situ scanning electron microscopy/energy dispersive X‐ray spectroscopy are reported. Despite the presence of a thin oxide/hydroxide/carbonate layer on the Li foil surface, degradation readily occurs in organic solvent, particularly at surface features such as ridges. Introduction of the ALD protective layer – deposited directly on this Li foil surface – dramatically suppresses the degradation.