Low-volume-change, dendrite-free lithium metal anodes enabled by lithophilic 3D matrix with LiF-enriched surface

Feng, Yangyang; Zhang, Chaofan; Li, Bing; Xiong, Shizhao; Song, Jiangxuan

doi:10.1039/c8ta10779c

Cited by 82 publications

(48 citation statements)

References 44 publications

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“…Especially at current densities on the Li anode greater than 10–20 mA cm −2 that are required for EVs to be charged in a short time (e.g., 10–15 min, 4–6 C, the goal of the United States Department of Energy), the growth of Li dendrites and capacity decay are more obvious according to Sand's theory . In addition, the severe volume change causes the rapid fragmentation of the fragile solid electrolyte interphase (SEI), which further aggravates the occurrence of side reactions and the growth of dendrites . Therefore, the development of effective strategies to prevent dendrite growth at ultrahigh current densities is essential.…”

Section: Introductionmentioning

confidence: 99%

Constructing a High‐Strength Solid Electrolyte Layer by In Vivo Alloying with Aluminum for an Ultrahigh‐Rate Lithium Metal Anode

et al. 2019

Adv Funct Materials

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The serious safety issues caused by uncontrollable lithium (Li) dendrite growth, especially at high current densities, seriously hamper the rapid charging of Li metal‐based batteries. Here, the construction of Al–Li alloy/LiCl‐based Li anode (ALA/Li anode) is reported by displacement and alloying reaction between an AlCl3‐ionic liquid and a Li foil. This layer not only has high ion‐conductivity and good electron resistivity but also much improved mechanical strength (776 MPa) as well as good flexibility compared to a common solid electrolyte interphase layer (585 MPa). The high mechanical strength of the Al–Li alloy interlayer effectively eliminates volume expansion and dendrite growth in Li metal batteries, so that the ALA/Li anode achieves superior cycling for 1600 h (2.0 mA cm−2) and 1000 cycles at an ultrahigh current density (20 mA cm−2) without dendrite formation in symmetric batteries. In lithium–sulfur batteries, the dense alloy layer prevents direct contact between polysulfides and Li metal, inhibiting the shuttle effect and electrolyte decomposition. Long cycling performance is achieved even at a high current density (4 C) and a low electrolyte/sulfur (6.0 µL mg−1). This easy fabrication process provides a strategy to realize reliable safety during the rapid charging of Li‐metal batteries.

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Section: Introductionmentioning

confidence: 99%

Constructing a High‐Strength Solid Electrolyte Layer by In Vivo Alloying with Aluminum for an Ultrahigh‐Rate Lithium Metal Anode

et al. 2019

Adv Funct Materials

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“…[9,14,21] In addition, a peak at 684.9 eV referring to LiF is also observed in the F 1s spectrum of the tuned Li metal as shown in Figure S2 (Supporting Information). [6,14,15,22] Therefore, these analytical results collectively evidence that a LiF-enriched coating layer is formed on the Li-metal surface. This artificial protective layer as ionic channels could effectively regulate the Li deposition behavior, mitigate the Li dendrite formation, and enhance the electrochemical cyclability of Li-metal anodes.…”

Section: Author Manuscriptmentioning

confidence: 58%

An Artificial Protective Coating toward Dendrite‐Free Lithium‐Metal Anodes for Lithium–Sulfur Batteries

Liu

Manthiram

2020

Energy Tech

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Metallic lithium (Li) has attracted considerable interest as a high-capacity anode material for the next-generation Li-metal batteries, yet its commercial availability is still challenged by its strong reactivity with electrolyte and uncontrollable growth of Li dendrites. Herein, a tuned Li anode is fabricated through a facile surface modification strategy. The LiF-dominant artificial coating layer, due to its low surface-diffusion energy barrier and excellent chemical stability against Li and electrolyte, is efficient in stabilizing the solid-electrolyte interphase (SEI) and directing homogeneous Li stripping/plating upon repeated cycling. Hence, it significantly mitigates the corrosion reaction on the anode side and restrains the Li dendrite growth, contributing to suppressed anode degradation. As a result, the tuned Li metal achieves high symmetric cell performance, delivering a substantially decreased voltage overpotential of 37 mV over 3,000 h of cycling (> 4 months) at high current density (up to 8 mA cm -2 ). Moreover, the assembled high-loading Li-S pouch cells (200 mg of sulfur) employing the tuned Li anode approach a high capacity (up to 189 mA h) together with good electrochemical cyclability. This work presents a viable route to regulate the Li surface chemistry and interface property for dendrite-free Li-metal anodes.In the wake of the rapid development of rechargeable batteries to meet the high-energy demand in the market of electric vehicles and portable electronics, metallic lithium (Li) is a

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“…However, the immoderate growth of Li dendrite during Li plating/stripping causes serious safety problem and poor performance that severely impedes the practical application of lithium metal batteries (LMBs) [4][5][6]. Until now, there have been numerous kinds of strategies be proposed to inhibit Li dendrites growth and protect lithium metal anode such as high concentration electrolytes [7], construction of the solid electrolyte interface layer [8], structural design of anode materials [9], regulation of Li + solvation [10], and solid-state electrolytes [11]. As an important part of battery structure, separator plays a vital role in the performance of battery [12].…”

Section: Separator Wettability Enhanced By Electrolyte Additive To Boost the Electrochemical Performance Of Lithium Metal Batteriesmentioning

confidence: 99%

Separator Wettability Enhanced by Electrolyte Additive to Boost the Electrochemical Performance of Lithium Metal Batteries

Wang

2021

Nano-Micro Lett.

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Low-volume-change, dendrite-free lithium metal anodes enabled by lithophilic 3D matrix with LiF-enriched surface

Abstract: We report a novel concept for a stable Li metal anode via the synergistic effect of a three-dimensional skeleton and stable artificial SEI.

Cited by 82 publications

References 44 publications

Constructing a High‐Strength Solid Electrolyte Layer by In Vivo Alloying with Aluminum for an Ultrahigh‐Rate Lithium Metal Anode

Constructing a High‐Strength Solid Electrolyte Layer by In Vivo Alloying with Aluminum for an Ultrahigh‐Rate Lithium Metal Anode

An Artificial Protective Coating toward Dendrite‐Free Lithium‐Metal Anodes for Lithium–Sulfur Batteries

Separator Wettability Enhanced by Electrolyte Additive to Boost the Electrochemical Performance of Lithium Metal Batteries

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