Volume 248, 2024

Effect of depth of discharge (DOD) on cycling in situ formed Li anodes

Abstract

Lithium-metal solid-state batteries (LMSSBs) have garnered immense interest due to their potential to enhance safety and energy density compared to traditional Li-ion batteries. The anode-free approach to manufacturing Li-metal anodes could provide the additional benefit of reducing cost. However, a lack of understanding of the mechano-electrochemical behavior related to the cycling of in situ formed Li anodes remains a significant challenge. To bridge this knowledge gap, this work aims to understand the cycling behavior of in situ formed Li anodes on garnet Li7La3Zr2O12 (LLZO) solid-electrolyte as a function of the depth of discharge (DOD). The results of this study show that cycling in situ formed Li of 3 mA h cm−2 with a DOD of 66% leads to unstable cycling, while cycling with a DOD of 33% exhibits stable cycling. Furthermore, we observed interfacial deterioration and inhomogeneity of in situ formed Li anodes during cycling with a DOD of 66%. This study provides mechanistic insight into the factors that affect stable cycling that can help guide approaches to improve the cycling behavior of in situ formed Li anodes.

Graphical abstract: Effect of depth of discharge (DOD) on cycling in situ formed Li anodes

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
21 Eph 2023
Accepted
22 Mey 2023
First published
31 Mey 2023

Faraday Discuss., 2024,248, 250-265

Author version available

Effect of depth of discharge (DOD) on cycling in situ formed Li anodes

K. Lee and J. Sakamoto, Faraday Discuss., 2024, 248, 250 DOI: 10.1039/D3FD00079F

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