Use of a Be-dome holder for texture and strain characterization of Li metal thin films via sin²(ψ) methodology

Journal Article · Thu Jun 04 00:00:00 EDT 2020 · Powder Diffraction

DOI:https://doi.org/10.1017/s0885715620000305· OSTI ID:1738929

Rodriguez, Mark A. ^[1]; Harrison, Katharine L. ^[1]; Goriparti, Subrahmanyam ^[1]; Griego, James J. M. ^[1]; Boyce, Brad L. ^[1]; Perdue, Brian R. ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Residual strain in electrodeposited Li films may affect safety and performance in Li metal battery anodes, so it is important to understand how to detect residual strain in electrodeposited Li and the conditions under which it arises. To explore this Li films, electrodeposited onto Cu metal substrates, were prepared under an applied pressure of either 10 or 1000 kPa and subsequently tested for the presence or absence of residual strain via sin²(ψ) analysis. X-ray diffraction (XRD) analysis of Li films required preparation and examination within an inert environment; hence, a Be-dome sample holder was employed during XRD characterization. Results show that the Li film grown under 1000 kPa displayed a detectable presence of in-plane compressive strain (–0.066%), whereas the Li film grown under 10 kPa displayed no detectable in-plane strain. Here, the underlying Cu substrate revealed an in-plane residual strain near zero. Texture analysis via pole figure determination was also performed for both Li and Cu and revealed a mild fiber texture for Li metal and a strong bi-axial texture of the Cu substrate. Experimental details concerning sample preparation, alignment, and analysis of the particularly air-sensitive Li films have also been detailed. This work shows that Li metal exhibits residual strain when electrodeposited under compressive stress and that XRD can be used to quantify that strain.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: AC04-94AL85000; NA0003525
• OSTI ID: 1738929
• Report Number(s): SAND--2020-13616J; 692778
• Journal Information: Powder Diffraction, Journal Name: Powder Diffraction Journal Issue: 2 Vol. 35; ISSN 0885-7156
• Publisher: Cambridge University Press
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE