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CO2-based atomic/molecular layer deposition of lithium ethylene carbonate thin films

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Abstract

When a conventional lithium-ion battery (LIB) is cycled, a solid electrolyte interphase (SEI) forms on the surface of a negative electrode, passivating it but also depleting the capacity of the battery. Most commercial LIBs utilize a carbonate-based electrolyte, which at least temporarily leads to the formation of lithium alkyl carbonates (ROCO2Li) as the main organic SEI component. Here, we pioneer the use of atomic/molecular layer deposition (ALD/MLD) for the fabrication of lithium ethyl glycoxide (LiEG) and lithium ethylene carbonate (LiEGCO) thin films, to mimic the lithium alkyl carbonate component of the SEI. For the in situ growth of LiEGCO, we employ for the first time CO2 as an ALD/MLD precursor. The films are characterized using XRR, GIXRD, FTIR, AFM and SEM.

Graphical abstract: CO2-based atomic/molecular layer deposition of lithium ethylene carbonate thin films

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Article information


Submitted
31 Mar 2020
Accepted
07 May 2020
First published
07 May 2020

This article is Open Access

Nanoscale Adv., 2020, Advance Article
Article type
Paper

CO2-based atomic/molecular layer deposition of lithium ethylene carbonate thin films

J. Heiska, M. Madadi and M. Karppinen, Nanoscale Adv., 2020, Advance Article , DOI: 10.1039/D0NA00254B

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