A Li–Al–O Solid‐State Electrolyte with High Ionic Conductivity and Good Capability to Protect Li Anode

Xie, Meilan; Xing, Lin; Huang, Zhen; Li, Yuyu; Zhong, Yun; Cheng, Zexiao; Yuan, Lixia; Shen, Yue; Lu, Xing; Zhai, Tianyou; Huang, Yunhui

doi:10.1002/adfm.201905949

Cited by 56 publications

(38 citation statements)

References 64 publications

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“…To increase the air tolerance of Li metal, various methods have been proposed to fabricate isolation layers. Polymers or composite materials, such as poly(tetramethylene ether glycol) (PTMEG)‐Li/Sn, [ 20 ] wax–poly(ethylene oxide) (PEO), [ 21 ] poly(vinylidene fluoride) (PVDF)–hexafluoropropylene (HFP), [ 22 ] paraffin wax, [ 23 ] poly(methyl methacrylate) (PMMA), [ 24 ] polyphosphoric ester (PPE)–Li 3 PO 4 , [ 25 ] and (Li 2 O) m (Al 2 O 3 ) n –LiF [ 26 ] were coated on Li metal via solution methods, and the derived modified layers were usually on the micron‐meter scale, sacrificing both actual volumetric and gravimetric energy densities of Li metal electrodes. Nanoscale modification layers, such as h‐BN, [ 27 ] ZrO 2 , [ 28 ] and Al, [ 29 ] are usually fabricated by chemical vapor deposition, atomic‐layer deposition, or magnetron sputtering, which are costly and unsuitable for large‐scale industrial processes.…”

Section: Introductionmentioning

confidence: 99%

Lithium Metal Electrode with Increased Air Stability and Robust Solid Electrolyte Interphase Realized by Silane Coupling Agent Modification

et al. 2021

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The quality of the solid electrolyte interphase (SEI) layer is the decisive factor for the electrochemical performance of Li‐metal‐based batteries. Due to the absence of effective bonding, a natural SEI layer may exfoliate from the Li anode during interfacial fluctuations. Here, a silane coupling agent is introduced to serve as an adhesion promoter to bridge these two dissimilar materials via both chemical bonding and physical intertwining effects. Its inorganic reactive groups can combine with the Li substrate by forming LiOSi bonds, while organic functional groups can take part in the formation of the SEI layer and thereby bond with SEI components. Li metal electrodes with silane coupling agent modification exhibit excellent electrochemical performance, even under extreme testing conditions. This modification layer with dense structure could also protect the Li metal from corrosion by air, evidenced by the comparable electrochemical activity of the modified Li metal electrodes even after being exposed in air for 2 h. This design provides a promising pathway for the development of Li metal electrodes that will be stable both in electrolyte and in air.

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Section: Introductionmentioning

confidence: 99%

Lithium Metal Electrode with Increased Air Stability and Robust Solid Electrolyte Interphase Realized by Silane Coupling Agent Modification

et al. 2021

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“…[ 9‐12 ] Another is interface modification by inorganic solid‐state electrolytes that shows high strength and Young’s modulus to repel dendrite traversing, or polymer coating layer that regulates Li‐ion flux by the interaction of polar groups in skeleton. [ 13‐16 ] Additionally, in situ formed solid electrolyte interphase (SEI) by optimizing electrolyte components, especially electrolyte additives, is of particular interest in terms of requirements for practical applications. [ 17‐20 ] The general role of SEI from most additives is help to passivate Li anode surface and re‐arrange Li diffusion so as to stop side reaction and dendrite growth.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances of Electroplating Additives Enabling Lithium Metal Anodes to Applicable Battery Techniques

Wang

Mai

Guan

et al. 2020

Energy & Environ Materials

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Lithium (Li) metal batteries have long been deemed as the representative high‐energy‐density energy storage systems due to the ultrahigh theoretical capacity and lowest electrochemical potential of Li metal anode. Unfortunately, the intractable dendritic Li deposition during cycling greatly restrains the large‐scale applications of Li metal anodes. Recent advances have been explored to address this issue, among which a specific class of electrolyte additives for electroplating is deeply impressive, as they are economic and pragmatic. Different from the conventional additives that construct solid electrolyte interphase (SEI) layer on anodes, they make dendrite‐free Li metal anodes feasible through altering Li plating behavior. In this research news article, the interlinked principles between industrial electroplating and Li deposition are firstly illustrated. The featured effects of electroplating additives on regulating Li plating morphology are also summarized and mainly divided into three categories: co‐deposition with Li cation, coordination with Li cation, and leveling effect of Li films. Furthermore, the mechanism exploration or derivative use of electroplating additive for dendrite suppression and potential research directions are proposed, with emphasizing that industrial electroplating might enable Li metal anode to scalable battery techniques and spread to metal battery systems beyond Li.

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“…[3] Replacing the traditional graphite anode in LIBs with metallic Li has great prospects to boost the energy density of rechargeable lithium batteries, because Li metal is recognized as one of the most promising anode materials owing to its ultrahigh theoretical specific capacity (3860 mAh g À1 ) and low electrochemical potential (À3.04 V vs. standard hydrogen electrode). [4] Nonetheless, Li metal anode has been severely hindered from practical applications by dendritic Li growth. [5] The uncontrollable Li dendrites can result in low Coulombic efficiency (CE) and short cycle life of a working battery.…”

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confidence: 99%

A Diffusion‐‐Reaction Competition Mechanism to Tailor Lithium Deposition for Lithium‐Metal Batteries

et al. 2020

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Lithium metal is recognized as one of the most promising anode materials owing to its ultrahigh theoretical specific capacity and low electrochemical potential. Nonetheless, dendritic Li growth has dramatically hindered the practical applications of Li metal anodes. Realizing spherical Li deposition is an effective approach to avoid Li dendrite growth, but the mechanism of spherical deposition is unknown. Herein, a diffusion-reaction competition mechanism is proposed to reveal the rationale of different Li deposition morphologies. By controlling the rate-determining step (diffusion or reaction) of Li deposition, various Li deposition scenarios are realized, in which the diffusion-controlled process tends to lead to dendritic Li deposition while the reaction-controlled process leads to spherical Li deposition. This study sheds fresh light on the dendrite-free Li metal anode and guides to achieve safe batteries to benefit future wireless and fossil-fuel-free world.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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A Li–Al–O Solid‐State Electrolyte with High Ionic Conductivity and Good Capability to Protect Li Anode

Cited by 56 publications

References 64 publications

Lithium Metal Electrode with Increased Air Stability and Robust Solid Electrolyte Interphase Realized by Silane Coupling Agent Modification

Lithium Metal Electrode with Increased Air Stability and Robust Solid Electrolyte Interphase Realized by Silane Coupling Agent Modification

Recent Advances of Electroplating Additives Enabling Lithium Metal Anodes to Applicable Battery Techniques

A Diffusion‐‐Reaction Competition Mechanism to Tailor Lithium Deposition for Lithium‐Metal Batteries

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