Surface engineering toward stable lithium metal anodes

Science Advances, Journal Year: 2023, Volume and Issue: 9(14)

Published: April 5, 2023

The lithium (Li) metal anode (LMA) is susceptible to failure due the growth of Li dendrites caused by an unsatisfied solid electrolyte interface (SEI). With this regard, design artificial SEIs with improved physicochemical and mechanical properties has been demonstrated be important stabilize LMAs. This review comprehensively summarizes current efficient strategies key progresses in surface engineering for constructing protective layers serve as SEIs, including pretreating LMAs reagents situated different primary states matter (solid, liquid, gas) or using some peculiar pathways (plasma, example). fundamental characterization tools studying on are also briefly introduced. Last, strategic guidance deliberate provided, challenges, opportunities, possible future directions these development practical applications discussed.

Language: Английский

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Engineering the Structural Uniformity of Gel Polymer Electrolytes via Pattern‐Guided Alignment for Durable, Safe Solid‐State Lithium Metal Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(38)

Published: June 3, 2023

Ultrathin and super-toughness gel polymer electrolytes (GPEs) are the key enabling technology for durable, safe, high-energy density solid-state lithium metal batteries (SSLMBs) but extremely challenging. However, GPEs with limited uniformity continuity exhibit an uneven Li+ flux distribution, leading to nonuniform deposition. Herein, a fiber patterning strategy developing engineering ultrathin (16 µm) fibrous high ionic conductivity (≈0.4 mS cm-1 ) superior mechanical toughness (≈613%) durable safe SSLMBs is proposed. The special patterned structure provides fast transport channels tailoring solvation of traditional LiPF6 -based carbonate electrolyte, rapid transfer kinetics uniform flux, boosting stability against Li anodes, thus realizing ultralong plating/stripping in symmetrical cell over 3000 h at 1.0 mA cm-2 , mAh . Moreover, LiFePO4 loading 10.58 mg deliver stable cycling life 1570 cycles C 92.5% capacity retention excellent rate 129.8 g-1 5.0 cut-off voltage 4.2 V (100% depth-of-discharge). Patterned systems powerful strategies producing SSLMBs.

Language: Английский

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Regulating Steric Hindrance of Porous Organic Polymers in Composite Solid‐State Electrolytes to Induce the Formation of LiF‐Rich SEI in Li‐Ion Batteries

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(39)

Published: Aug. 2, 2023

Lithium fluoride (LiF) at the solid electrolyte interface (SEI) contributes to stable operation of polymer-based solid-state lithium metal batteries. Currently, most methods for constructing SEI are based on design polar groups fillers. However, mechanism behind how steric hindrance fillers impacts LiF formation remains unclear. This study synthesizes three kinds porous polyacetal amides (PAN-X, X=NH2 , NH-CH3 N-(CH3 )2 ) with varying hindrances by regulating number methyl substitutions nitrogen atoms reaction monomer, which incorporated into polymer composite electrolytes, investigate regulation content in SEI. The results show that bis(trifluoromethanesulfonyl)imide (TFSI- will compete charge without effect, while excessive hinders interaction between TFSI- and groups, reducing acquisition. Only when one hydrogen atom amino group is replaced a group, from prevents capturing direction, thereby facilitating transfer separate promoting maximum formation. work provides novel perspective LiF-rich

Language: Английский

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Work‐Function‐Induced Interfacial Electron/Ion Transport in Carbon Hosts toward Dendrite‐Free Lithium Metal Anodes

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(44)

Published: Sept. 15, 2023

Coupled electron/ion transport is a decisive feature of Li plating/stripping, wherein the compatibility rates determines morphology deposited Li. Local Li+ hotspots form due to inhomogeneous interfacial charge transfer and lead uncontrolled deposition, which decreases utilization rate safety metal anodes. Herein, we report method obtain dendrite-free anodes by driving electron pumping accumulating boosting ion diffusion tuning work function carbon host using cobalt-containing catalysts. The results reveal that increasing provides an deviation from C Co, electron-rich Co shows favorable binding . catalysts boost on fiber scaffolds without local aggregation reducing migration barrier. as-obtained anode exhibits Coulombic efficiency 99.0 %, cycle life over 2000 h, 50 capacity retention 83.4 % after 130 cycles in pouch cells at negative/positive ratio 2.5. These findings provide novel strategy stabilize regulating materials electrocatalysts.

Language: Английский

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A solid-state lithium-ion battery with micron-sized silicon anode operating free from external pressure

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 13, 2024

Applying high stack pressure (often up to tens of megapascals) solid-state Li-ion batteries is primarily done address the issues internal voids formation and subsequent transport blockage within solid electrode due volume changes. Whereas, redundant pressurizing devices lower energy density raise cost. Herein, a mechanical optimization strategy involving elastic electrolyte proposed for SSBs operating without external pressurizing, but relying solely on built-in cells. We combine soft-rigid dual monomer copolymer with deep eutectic mixture design an electrolyte, which exhibits not only stretchability deformation recovery capability also room-temperature conductivity 2×10

Language: Английский

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Mechanically Interlocked Polymers with Dense Mechanical Bonds

Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: 57(6), P. 992 - 1006

Published: Feb. 28, 2024

ConspectusMechanically interlocked polymers (MIPs) such as polyrotaxanes and polycatenanes are polymer architectures that incorporate mechanical bonds, which represent a compelling frontier in science. MIPs with cross-linked structures known mechanically networks (MINs) widely utilized materials Leveraging the motion of MINs hold potential for achieving combination robustness dynamicity. Currently, reported predominantly consist discrete bonds cross-linking points, exemplified by well-known slide-ring rotaxane/catenane polymers. The these points facilitates redistribution tension throughout network, effectively preventing stress concentration thereby enhancing material toughness. In instances, impact can be likened to adage "small things make big difference", whereby limited number substantially elevate performance conventional addition there is another type MIN their principal parts chains composed dense bonds. Within MINs, generally serve repeating units, unique properties stem from integrating amplifying function large amount Consequently, tend reflect intrinsic polymers, making exploration critical comprehensive understanding MIPs. Nevertheless, investigations into featuring remain relatively scarce.This Account presents overview our investigation insights First, we delve synthetic strategies employed prepare while critically evaluating advantages limitations. Through meticulous control core interlocking step, three distinct have emerged: followed polymerization, supramolecular polymerization interlocking, dynamic interlocking. Furthermore, underscore structure–property relationships macroscopic originate countless microscopic motions phenomenon define an integration amplification mechanism. Our has revealed detailed characteristics bulk materials, encompassing quantification activation energy, discrimination varying distances, elucidation recovery process. Additionally, elucidated influence on respective materials. Moreover, explored applications leveraging exceptional These include toughness engineering adaptive multifunctional aerogels, mitigating Li protrusion interfacial layers lithium-ion batteries. Finally, offer personal perspectives promises, opportunities, key challenges future development underscoring transformative advancements this burgeoning field.

Language: Английский

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Selectively fluorinated aromatic lithium salts regulate the solvation structure and interfacial chemistry for all-solid-state batteries

Science Advances, Journal Year: 2025, Volume and Issue: 11(5)

Published: Jan. 31, 2025

Solid polymer electrolytes suffer from the polymer-dominated Li + solvation structure, causing unstable electrolyte/electrode interphases and deteriorated battery performance. Here, we design a class of selectively fluorinated aromatic lithium salts (SFALS) as single conducting to regulate structure interfacial chemistry for all-solid-state metal batteries. By tuning anionic -polyether coupling is weakened, -anion coordination enhanced. The hydrogen bonding between SFALS matrix induces special “triad”-type which improves electrolyte homogeneity mechanical strength, promotes formation an ultrathin robust 2 O-rich solid interphase. Therefore, stable cycling more than 1650 cycles (Coulombic efficiency, 99.8%) LiFePO 4 /Li half cells 580 (97.4% capacity retention) full achieved. This molecular engineering strategy could inspire further advancements functional practical application

Language: Английский

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Catalytic Current Collector Design to Accelerate LiNO₃ Decomposition for High‐Performing Lithium Metal Batteries

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(43)

Published: Oct. 3, 2023

Abstract Lithium nitrate is an attractive lithium additive in the construction of high‐performance metal anodes with a Li 3 N‐rich solid electrolyte interphase (SEI) layer. However, eight‐electron transfer process induces high energy barriers between LiNO and N. Herein, inner Helmholtz plane tuned on deposition host to attain sluggish/rapid decomposition kinetics, resulting different intermediate content distributions species SEI. Notably, oxynitride (LiNO) identified as intermediate, experimental simulation results confirm its role obstructing decomposition. Moreover, reveal that dipole–dipole interaction polar V≡N bond can change ionic/covalent character N═O bonds, considerably facilitating cleavage, promoting reduction achieve Consequently, when contains 0.37 m , dendrite, dead formation are suppressed effectively VN system, average Coulombic efficiency 99.7% over 1000 cycles (1 mA cm −2 1 mAh ) be attained. These promote nitride oxidation break pave way for fabricating batteries.

Language: Английский

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Mechanically interlocked [an]daisy chain networks

Chem, Journal Year: 2023, Volume and Issue: 9(8), P. 2206 - 2221

Published: May 4, 2023

Language: Английский

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Block copolymer electrolytes for lithium metal batteries: Strategies to boost both ionic conductivity and mechanical strength

Progress in Polymer Science, Journal Year: 2023, Volume and Issue: 146, P. 101743 - 101743

Published: Sept. 17, 2023

Language: Английский

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