The Inducement and “Rejuvenation” of Li Dendrites by Space Confinement and Positive Fe/Co‐Sites

Liu, Ziqin; Dong, Xin; Wen, Jing; Hu, Pu; Shang, Chaoqun

doi:10.1002/smll.202300106

Cited by 10 publications

(4 citation statements)

References 54 publications

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“…When the current density increased from 1 to 10 mA cm –2 , the overpotential of PP cell is over 170 mV while the UD MMT-PVA@PP cell remained at only 70 mV steadily (Figure g). Comparing with earlier reports ,− ,, on a separator-modified Li||Li symmetric battery with UD MMT-PVA@PP exhibits much better cycle stability, as well as a much longer lifespan (see Figure h and Table S1).…”

supporting

confidence: 45%

Separators Modified with Ultrathin Montmorillonite/Polymer Nanocoatings Achieve Dendrite-Free Lithium Deposition at High Current Densities

Zhang,

Hua,

Zhao

et al. 2024

Nano Lett.

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Fatal dendritic growth in lithium metal batteries is closely related to the composition and thickness of the modified separator. Herein, an ultrathin nanocoating composed of monolayer montmorillonite (MMT), poly(vinyl alcohol) (PVA) on a polypropylene separator is prepared. The MMT was exfoliated into monolayers (only 0.96 nm) by intercalating PVA under ultrasound, followed by cross-linking with glutaraldehyde. The thickness of the nanocoating on the polypropylene separator, as determined using the pull-up method, is only 200−500 nm with excellent properties. As a result, the lithium-symmetric battery composed of it has a low overpotential (only 40 mV) and a long lifespan of more than 7900 h at high current density, because ion transport is unimpeded and Li + flows uniformly through the ordered ion channels between the MMT layers. Additionally, the separator exhibited excellent cycling stability in Li−S batteries. This study offers a new idea for fabricating ultrathin clay/polymer modified separators for metal anode stable cycling at high current densities.

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supporting

confidence: 45%

Separators Modified with Ultrathin Montmorillonite/Polymer Nanocoatings Achieve Dendrite-Free Lithium Deposition at High Current Densities

Zhang,

Hua,

Zhao

et al. 2024

Nano Lett.

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“…Liu et al improved LSB performance by utilizing an Fe-Co-based Prussian blue analog (H-PBA) with a hollow and open framework to modify a commercial PP separator (PP@H-PBA) [247]. The macroporous structure of H-PBA and the open framework guided the growth of Li dendrites through space confinement.…”

Section: Plating Regulationmentioning

confidence: 99%

“…b Scheme portraying the systematic evolution of SEI in the GQDs-modified Li symmetrical cell from the fresh cell to continuous plating-stripping cycles, where GQDs and Li and its salts undergo synergistic interaction to realize smooth and near F-rich SEI (Reprinted with permission from[246], 2022, Wiley-VCH). c Schematic illustration of Li deposition processes of PP@H-PBA, PP@S-PBA, and PP (Reprinted with permission from[247], 2023, Wiley-VCH)…”

mentioning

confidence: 99%

Recent advances in li metal anode protection for high performance lithium-sulfur batteries

Han,

Lee,

Kim

et al. 2024

Discov Chem Eng

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Lithium-sulfur batteries (LSBs) have garnered significant attention as a promising next-generation rechargeable battery, offering superior energy density and cost-effectiveness. However, the commercialization of LSBs faces several challenges, including the ionic/electronic insulating nature of the active materials, lithium polysulfide (LiPS) shuttle effect, volume expansion/contraction of the cathode, and issues with Li metal anode. Despite numerous efforts to address these challenges, previous studies have predominantly been conducted under mild conditions such as high electrolyte-to-sulfur (E/S) ratio, low sulfur loading, and excess Li metal, which cover issues related to Li metal anode. However, for realizing high-energy–density LSBs, practical conditions such as low E/S ratio, high sulfur loading, and limited Li metal are essential. Under these conditions, the increased current on Li metal and higher LiPS concentration exacerbate issues with Li metal anode such as dendrite growth, dead Li, high reactivity with electrolyte, and high reactivity with LiPSs. These problems lead to rapid failure of Li metal, significantly impacting the electrochemical performance of LSBs. Consequently, protecting Li metal anode is crucial for the practical LSBs. This paper introduces the challenges associated with Li metal anode in LSBs and reviews research focused on protecting Li metal anode in each battery component: anode, electrolyte, cathode, and separator/interlayer. Finally, we discuss future research directions of each component towards practical LSBs. Graphical Abstract

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“…These mechanisms offer distinct advantages in addressing critical challenges within the battery field, encompassing issues such as capacity degradation, electrode volume expansion, and restricted ionic transport. [ 17 ]…”

Section: Exploring Confinement Effects In Rechargeable Batteriesmentioning

confidence: 99%

Unveiling Confinement Engineering for Achieving High‐Performance Rechargeable Batteries

Lv,

Luo,

Liu

et al. 2024

Advanced Materials

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The confinement effect, restricting materials within nano/sub‐nano spaces, has emerged as an innovative approach for fundamental research in diverse application fields, including chemical engineering, membrane separation, and catalysis. This confinement principle recently presents fresh perspectives on addressing critical challenges in rechargeable batteries. Within spatial confinement, novel microstructures and physiochemical properties have been raised to promote the battery performance. Nevertheless, few clear definitions and specific reviews are available to offer a comprehensive understanding and guide for utilizing the confinement effect in batteries. This review aims to fill this gap by primarily summarizing the categorization of confinement effects across various scales and dimensions within battery systems. Subsequently, the strategic design of confinement environments is proposed to address existing challenges in rechargeable batteries. These solutions involve the manipulation of the physicochemical properties of electrolytes, the regulation of electrochemical activity and stability of electrodes, and insights into ion transfer mechanisms. Furthermore, specific perspectives are provided to deepen the foundational understanding of the confinement effect for achieving high‐performance rechargeable batteries. Overall, this review emphasizes the transformative potential of confinement effects in tailoring the microstructure and physiochemical properties of electrode materials, highlighting their crucial role in designing novel energy storage devices.This article is protected by copyright. All rights reserved

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The Inducement and “Rejuvenation” of Li Dendrites by Space Confinement and Positive Fe/Co‐Sites

Abstract: Research data are not shared.

Cited by 10 publications

References 54 publications

Separators Modified with Ultrathin Montmorillonite/Polymer Nanocoatings Achieve Dendrite-Free Lithium Deposition at High Current Densities

Separators Modified with Ultrathin Montmorillonite/Polymer Nanocoatings Achieve Dendrite-Free Lithium Deposition at High Current Densities

Recent advances in li metal anode protection for high performance lithium-sulfur batteries

Unveiling Confinement Engineering for Achieving High‐Performance Rechargeable Batteries

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