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Stable ultrathin lithium metal anode enabled by self-adapting electrochemical regulating strategy

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Energy Mater 2024;4:[Accepted].
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Abstract

Ultrathin lithium metal foils with controllable capacity could realize high-specific-energy batteries, however, the pulverization of Li metal foils due to its extreme volume change results in rapid active Li loss and capacity fading. Here, we report a strategy to stabilize ultrathin Li metal anode via in-situ transferring Li from ultrathin Li foil into a well-designed 3D gradient host during cycling process. A 3D carbon fiber with gradient distribution of Ag nanoparticles is placed on the ultrathin Li foil in advance and acts as a Li reservoir, guiding Li deposition into its interior and thus alleviating the volume change of ultrathin Li foil anode. Hence, a high reversibility of Li metal is achieved and Li pulverization is suppressed, which can be witnessed by a long cyclic life in the symmetric cells. The proposed method offers a versatile and facile approach for protecting ultrathin Li metal anode, which will boost their commercial application process.

Keywords

Li metal anode, 3D scaffold, self-adapting, long lifespan, stability

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Zeng SY, Wang WL, Li D, Yang C, Zheng ZJ. Stable ultrathin lithium metal anode enabled by self-adapting electrochemical regulating strategy. Energy Mater 2024;4:[Accept]. http://dx.doi.org/10.20517/energymater.2023.93



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© The Author(s) 2024. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, sharing, adaptation, distribution and reproduction in any medium or format, for any purpose, even commercially, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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