Self‐Healable Solid Polymeric Electrolytes for Stable and Flexible Lithium Metal Batteries

Wu, Na; Shi, Yaru; Lang, Shuang‐Yan; Zhou, Jinming; Liang, Jun‐Hong; Wang, Wei; Tan, Shuang‐Jie; Yin, Ya‐Xia; Wen, Rui; Guo, Yu‐Guo

doi:10.1002/anie.201910478

Cited by 141 publications

(94 citation statements)

References 39 publications

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“…[1,2,[20][21][22][23] Nevertheless, the large-scale application of SPEs in LMBs is still inevitably hindered because of the sluggish transport of Li ions and poor affinity of the Li/electrolyte interface. [24][25][26][27][28] Considering the ultrahigh reducibility of Li, serious parasitic reactions (e.g., Li reacts with poly(ethylene oxide) (PEO) to form Li 2 O, C 2 H 4 , and H 2 ) inevitably occur at the Li/PEO interface to harm the performances of batteries. [29][30][31][32] Moreover, the Li/ PEO interface may be continuously thickened during the battery operation originated from the repeated reactions between fresh SPE and Li (Figure 1a), resulting in large electrochemical impedance and uneven surface morphology.…”

Section: Doi: 101002/adma202000223mentioning

confidence: 99%

“…[29][30][31][32] Moreover, the Li/ PEO interface may be continuously thickened during the battery operation originated from the repeated reactions between fresh SPE and Li (Figure 1a), resulting in large electrochemical impedance and uneven surface morphology. [27,33,34] These evolutions at the Li/PEO interface will lead to evident capacity fading with the inferior cyclability. [24,33,35] Tremendous strategies have been proposed to address the intractable issues in the Li/PEO interface, including constructing 3D matrix for Li metal, designing artificial SEI layers, and fabricating the mechanically strong SPEs.…”

Section: Doi: 101002/adma202000223mentioning

confidence: 99%

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In Situ Construction of a LiF‐Enriched Interface for Stable All‐Solid‐State Batteries and its Origin Revealed by Cryo‐TEM

et al. 2020

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The application of solid polymer electrolytes (SPEs) is still inherently limited by the unstable lithium (Li)/electrolyte interface, despite the advantages of security, flexibility, and workability of SPEs. Herein, the Li/electrolyte interface is modified by introducing Li2S additive to harvest stable all‐solid‐state lithium metal batteries (LMBs). Cryo‐transmission electron microscopy (cryo‐TEM) results demonstrate a mosaic interface between poly(ethylene oxide) (PEO) electrolytes and Li metal anodes, in which abundant crystalline grains of Li, Li2O, LiOH, and Li2CO3 are randomly distributed. Besides, cryo‐TEM visualization, combined with molecular dynamics simulations, reveals that the introduction of Li2S accelerates the decomposition of N(CF3SO2)2− and consequently promotes the formation of abundant LiF nanocrystals in the Li/PEO interface. The generated LiF is further verified to inhibit the breakage of CO bonds in the polymer chains and prevents the continuous interface reaction between Li and PEO. Therefore, the all‐solid‐state LMBs with the LiF‐enriched interface exhibit improved cycling capability and stability in a cell configuration with an ultralong lifespan over 1800 h. This work is believed to open up a new avenue for rational design of high‐performance all‐solid‐state LMBs.

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Section: Doi: 101002/adma202000223mentioning

confidence: 99%

Section: Doi: 101002/adma202000223mentioning

confidence: 99%

In Situ Construction of a LiF‐Enriched Interface for Stable All‐Solid‐State Batteries and its Origin Revealed by Cryo‐TEM

et al. 2020

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“…They also show good thermal stability, high mechanical rigidity, and nonflammability. [110][111][112] Common SSEs include polymer electrolytes, [113][114][115] polymer-inorganic composite electrolytes, [116][117][118] and inorganic electrolytes. [119][120][121] Amongst these, inorganic electrolytes have received great attention due to their high ionic conductivity and extremely high Young's modulus, which can enhance the safety of Li-metal batteries.…”

Section: Composite Anodes In Solid-state Batteriesmentioning

confidence: 99%

Recent Progress in Designing Stable Composite Lithium Anodes with Improved Wettability

2020

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Lithium (Li) is a promising battery anode because of its high theoretical capacity and low reduction potential, but safety hazards that arise from its continuous dendrite growth and huge volume changes limit its practical applications. Li can be hosted in a framework material to address these key issues, but methods to encage Li inside scaffolds remain challenging. The melt infusion of molten Li into substrates has attracted enormous attention in both academia and industry because it provides an industrially adoptable technology capable of fabricating composite Li anodes. In this review, the wetting mechanism driving the spread of liquefied Li toward a substrate is discussed. Following this, various strategies are proposed to engineer stable Li metal composite anodes that are suitable for liquid and solid-state electrolytes. A general conclusion and a perspective on the current limitations and possible future research directions for constructing composite Li anodes for high-energy lithium metal batteries are presented.

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“…The addition of succinonitrile plasticizer allows the electrolyte to reach an excellent conductivity that even exceeds 10 −4 S•cm −1 at room temperature. Recently, Wu et al reported a self-healing solid polymer electrolyte (SHSPE) that is crosslinked by the dynamic intermolecular hydrogen bond between urea and ester groups located in the PEO chains [96]. The authors indicated that the inter-chain hydrogen bond and attractive Coulombic forces among the ions in the lithium salt facilitate fast self-healing.…”

Section: Crosslinked Polymermentioning

confidence: 99%

Comprehensive Review of Polymer Architecture for All-Solid-State Lithium Rechargeable Batteries

2020

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Solid-state batteries are an emerging option for next-generation traction batteries because they are safe and have a high energy density. Accordingly, in polymer research, one of the main goals is to achieve solid polymer electrolytes (SPEs) that could be facilely fabricated into any preferred size of thin films with high ionic conductivity as well as favorable mechanical properties. In particular, in the past two decades, many polymer materials of various structures have been applied to improve the performance of SPEs. In this review, the influences of polymer architecture on the physical and electrochemical properties of an SPE in lithium solid polymer batteries are systematically summarized. The discussion mainly focuses on four principal categories: linear, comb-like, hyper-branched, and crosslinked polymers, which have been widely reported in recent investigations as capable of optimizing the balance between mechanical resistance, ionic conductivity, and electrochemical stability. This paper presents new insights into the design and exploration of novel high-performance SPEs for lithium solid polymer batteries.

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Self‐Healable Solid Polymeric Electrolytes for Stable and Flexible Lithium Metal Batteries

Cited by 141 publications

References 39 publications

In Situ Construction of a LiF‐Enriched Interface for Stable All‐Solid‐State Batteries and its Origin Revealed by Cryo‐TEM

In Situ Construction of a LiF‐Enriched Interface for Stable All‐Solid‐State Batteries and its Origin Revealed by Cryo‐TEM

Recent Progress in Designing Stable Composite Lithium Anodes with Improved Wettability

Comprehensive Review of Polymer Architecture for All-Solid-State Lithium Rechargeable Batteries

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