Study on dead-Li suppression mechanism of Li-hosting vapor-grown-carbon-nanofiber-based protective layer for Li metal anodes

Jo, Hearin; Song, Danoh; Jeong, Yong‐Cheol; Lee, Yong Min; Ryou, Myung‐Hyun

doi:10.1016/j.jpowsour.2018.09.059

Cited by 17 publications

(14 citation statements)

References 37 publications

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“…Dendrites can penetrate the separator, leading to internal short circuits, combustion or even explosion of the cells [7][8][9]. In addition, lithium dendrites could crack, deactivate, pulverization and detach from the anode due to the reaction with the electrolyte [7,10,11]. This results in irreversible capacity loss and low coulombic efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Many strategies have been developed to inhibit dendrite growth, such as modifying the anode surface [10,[12][13][14][15], optimizing liquid electrolytes [16][17][18][19], using solid or gel polymer electrolytes [8,20,21], and modifying the separator [22][23][24][25]. The solid or gel polymer electrolytes is considered as one of the most promising solutions due to their safety, stability, flexibility and ease of processing.…”

Section: Introductionmentioning

confidence: 99%

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Functional lithiophilic polymer modified separator for dendrite-free and pulverization-free lithium metal batteries

Shen

Liu

Dong

et al. 2021

Journal of Energy Chemistry

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Functional lithiophilic polymer modified separator for dendrite-free and pulverization-free lithium metal batteries

Shen

Liu

Dong

et al. 2021

Journal of Energy Chemistry

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“…As such, the Li dendrites develop in an uncontrolled fashion that can eventually pierce the separator and cause short circuit. Moreover, the fractures of dendrites during repeated Li deposition/stripping result in “dead” Li sections composed of isolated Li fragments surrounded by e − ‐insulating SEI . The “dead” Li with high impedance leads to poor kinetics and shortened lifespan of the battery …”

Section: Introductionmentioning

confidence: 99%

“…[11] As a result, the fresh Li exposure created by SEI fracturing consumes electrolyte continuously, leading to low coulombic efficiency. [13,14] The "dead" Li with high impedance leads to poor kinetics and shortened lifespan of the battery. Moreover, the fractures of dendrites during repeated Li deposition/stripping result in "dead" Li sections composed of isolated Li fragments surrounded by e −insulating SEI.…”

mentioning

confidence: 99%

“Top‐Down” Li Deposition Pathway Enabled by an Asymmetric Design for Li Composite Electrode

Yue

Bao

et al. 2019

Advanced Energy Materials

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safety issue due to dendrite growth during the repeated Li stripping/plating process. [7][8][9] On one hand, the surface defects of the bare Li serve as the active sites to increase the local current density, leading to uneven Li deposition. [10] On the other hand, the "hostless" feature of Li metal results in huge volume change during cycling, causing unstable solid electrolyte interphase (SEI). [11] As a result, the fresh Li exposure created by SEI fracturing consumes electrolyte continuously, leading to low coulombic efficiency. [12] As such, the Li dendrites develop in an uncontrolled fashion that can eventually pierce the separator and cause short circuit. Moreover, the fractures of dendrites during repeated Li deposition/stripping result in "dead" Li sections composed of isolated Li fragments surrounded by e −insulating SEI. [13,14] The "dead" Li with high impedance leads to poor kinetics and shortened lifespan of the battery. [15] In order to inhibit Li dendrite growth and build stable SEI layers, considerable efforts have been made. One approach is the coating of an artificial SEI with high mechanical strength onto the electrode surface. [16][17][18][19] However, because of the volume change of Li metal, the structural integrity of the protective layers is hard to be maintained during prolonged running. In order to remit the volume change, great efforts have been made to design porous frameworks to accommodate Li. [20][21][22][23][24][25][26] A series of host frameworks have been reported, such as 3D CoO/Ni foam skeleton, [27] coralloid carbon fiber scaffolds, [28] lithiophilic Cu-Ni core-shell nanowire network, [29] and 3D carbon fiber framework. [30] The host frameworks can not only accommodate the volume change of Li during cycling, but also reduce the local current density. [31][32][33][34] More importantly, the porous structure of these frameworks can suppress the dendrite formation by changing Li plating/ stripping behavior. [35][36][37] It should be noted that most of the reported composited electrodes possess symmetric structure for their two sides, especially for the electrodes fabricated by thermal infusion method. [38] However, as the anode for the battery, the two sides of the electrode are in different environments: one side contacts with the separator, while the other side faces the current collector. The requirements and functions for the two sides are thus quite different. [39] The side facing the separator should be facile for Li-ion transportation.Designing Li composite electrodes with host frameworks for accommodating Li metal has been considered to be an effective approach to suppress Li dendrites. Herein, an asymmetric design of a Mo net/Li metal film (MLF) composite electrode is developed by an inverted thermal infusion method. The asymmetric MLF electrode has a dense oxide passivated layer on the top side, a porous Mo net matrix on the back side, and active Li layer in between. The back side has a larger specific area and higher electric field than the top side, which contacts with ...

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“…[268,269] Meanwhile, it can also act as the artificial solid electrolyte interface by alleviating the large mechanical stress and tolerate dendrite growth. [270,271] Various strategies have been reported to construct a stable interface between Li metal and organic electrolyte. AlCl 3 , LiNO 3 , Li polysulfide, and lithium bis(trifluoromethylsulphonyl)imide additives have been selected to in situ form SEI layer on Li metal, but the mechanical properties are not satisfactory.…”

Section: Creating Protective Layers On LI Metalmentioning

confidence: 99%

Commercialization‐Driven Electrodes Design for Lithium Batteries: Basic Guidance, Opportunities, and Perspectives

Cao

Liang

Zhang

et al. 2021

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vehicles (HEVs), because of their high energy density and long lifetime. [1][2][3] In recent years, the ever-growing demand on electric vehicles contributes to the continuous growth of the battery market, and the energy storage devices of EVs/HEVs raise stern demands on higher energy density (>300 Wh kg −1 ) and lower cost (500 Wh kg −1 ), and the standard parameters for different electrode systems toward this high energy density goal are well summarized in the previous works. [7][8][9] In particular, the innovative battery chemistries (i.e., Li-metal battery and all-solid-state lithium battery) using Li metal as anode, exhibit much higher energy density than current lithium-ion batteries, whereas some technological issues are needed to be addressed first, such as dendrite formation suppression, industrial battery Current lithium-ion battery technology is approaching the theoretical energy density limitation, which is challenged by the increasing requirements of ever-growing energy storage market of electric vehicles, hybrid electric vehicles, and portable electronic devices. Although great progresses are made on tailoring the electrode materials from methodology to mechanism to meet the practical demands, sluggish mass transport, and charge transfer dynamics are the main bottlenecks when increasing the areal/volumetric loading multiple times to commercial level. Thus, this review presents the state-of-the-art developments on rational design of the commercialization-driven electrodes for lithium batteries. First, the basic guidance and challenges (such as electrode mechanical instability, sluggish charge diffusion, deteriorated performance, and safety concerns) on constructing the industry-required high mass loading electrodes toward commercialization are discussed. Second, the corresponding design strategies on cathode/anode electrode materials with high mass loading are proposed to overcome these challenges without compromising energy density and cycling durability, including electrode architecture, integrated configuration, interface engineering, mechanical compression, and Li metal protection. Finally, the future trends and perspectives on commercializationdriven electrodes are offered. These design principles and potential strategies are also promising to be applied in other...

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Study on dead-Li suppression mechanism of Li-hosting vapor-grown-carbon-nanofiber-based protective layer for Li metal anodes

Cited by 17 publications

References 37 publications

Functional lithiophilic polymer modified separator for dendrite-free and pulverization-free lithium metal batteries

Functional lithiophilic polymer modified separator for dendrite-free and pulverization-free lithium metal batteries

“Top‐Down” Li Deposition Pathway Enabled by an Asymmetric Design for Li Composite Electrode

Commercialization‐Driven Electrodes Design for Lithium Batteries: Basic Guidance, Opportunities, and Perspectives

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