Insights into charge transfer dynamics of Li batteries through temperature-dependent electrochemical impedance spectroscopy (EIS) utilizing symmetric cell configuration

Electrochimica Acta, Journal Year: 2024, Volume and Issue: 485, P. 144080 - 144080

Published: March 13, 2024

Language: Английский

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Constructing an Anion-Braking Separator to Regulate Local Li⁺ Solvation Structure for Stabilizing Lithium Metal Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(3), P. 2250 - 2260

Published: Jan. 5, 2024

Lithium metal batteries (LMBs) offer significant advantages in energy density and output voltage, but they are severely limited by uncontrollable Li dendrite formation resulting from uneven Li+ behaviors high reactivity with potential co-solvent plating. Herein, to uniformly enhance the desolvation diffusion, local solvation shell structure is optimized constructing an anion-braking separator, hence dynamically reducing self-amplifying behavior of dendrites. As a prototypal, two-dimensional lithiated-montmorillonite (LiMMT) blade-coated on commercial where abundant −OH groups as Lewis acidic sites electron acceptors could selectively adsorb corresponding FSI– anions, regulating restricting their migration. Meanwhile, weakened anion mobility delays time breaking electrical neutrality, nucleation quantified through respective experimental, theoretical spectroscopical results, providing comprehensive understanding modifying cation dendritic growth suppression. anticipated, long plating/stripping lifespan up 1800 h significantly increased average Coulombic efficiency 98.8% achieved under 3.0 mAh cm–2. The fabricated high-loading Li-LFP or Li-NCM523 full-cells display cycle durability enhanced capacity retention nearly 100%, instructive guide towards realizing dendrite-free LMBs.

Language: Английский

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In‐Depth Understanding of Interfacial Na⁺ Behaviors in Sodium Metal Anode: Migration, Desolvation, and Deposition

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(41)

Published: Aug. 17, 2024

Abstract Interfacial Na + behaviors of sodium (Na) anode severely threaten the stability sodium‐metal batteries (SMBs). This review systematically and in‐depth discusses current fundamental understanding interfacial in SMBs including migration, desolvation, diffusion, nucleation, deposition. The key influencing factors optimization strategies these are further summarized discussed. More importantly, high‐energy‐density anode‐free metal (AFSMBs) highlighted by addressing issues areas limited sources irreversible loss. Simultaneously, recent advanced characterization techniques for deeper insights into deposition behavior composition information SEI film spotlighted to provide guidance advancement AFSMBs. Finally, prominent perspectives presented guide promote development

Language: Английский

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Regulating ion transport behaviors toward dendrite-free potassium metal batteries: recent advances and perspectives

Rare Metals, Journal Year: 2024, Volume and Issue: 43(4), P. 1435 - 1460

Published: Jan. 20, 2024

Language: Английский

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Superfast Zincophilic Ion Conductor Enables Rapid Interfacial Desolvation Kinetics for Low‐Temperature Zinc Metal Batteries

Advanced Science, Journal Year: 2024, Volume and Issue: 11(28)

Published: May 9, 2024

Abstract Low‐temperature rechargeable aqueous zinc metal batteries (AZMBs) as highly promising candidates for energy storage are largely hindered by huge desolvation barriers and depressive Zn 2+ migration kinetics. In this work, a superfast zincophilic ion conductor of layered silicate nanosheet (LZS) is constructed on metallic surface, an artificial layer diffusion accelerator. The experimental simulation results reveal the ability structure LZS not only promote kinetics [Zn(H 2 O) 6 ] but also accelerate transport across anode/electrolyte interface, guiding uniform deposition. Benefiting from these features, LZS‐modified anodes showcase long‐time stability (over 3300 h) high Coulombic efficiency with ≈99.8% at mA cm −2 , respectively. Even reducing environment temperature down to 0 °C, ultralong cycling up 3600 h distinguished rate performance realized. Consequently, assembled Zn@LZS//V O 5‐x full cells deliver superior cyclic (344.5 mAh g −1 after 200 cycles 1 A ) capability (285.3 10 together low self‐discharge rate, highlighting bright future low‐temperature AZMBs.

Language: Английский

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Olefin‐Linked Covalent Organic Frameworks with Electronegative Channels as Cationic Highways for Sustainable Lithium Metal Battery Anodes

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(37)

Published: July 25, 2023

Despite the enormous interest in Li metal as an ideal anode material, uncontrollable dendrite growth and unstable solid electrolyte interphase have plagued its practical application. These limitations can be attributed to sluggish uneven Li+ migration towards surface. Here, we report olefin-linked covalent organic frameworks (COFs) with electronegative channels for facilitating selective transport. The triazine rings fluorinated groups of COFs are introduced electron-rich sites capable enhancing salt dissociation guiding uniform flux within channels, resulting a high transference number (0.85) ionic conductivity (1.78 mS cm-1 ). mixed polymeric binder form matrix membranes. membranes enable reliable plating/stripping cyclability over 700 h Li/Li symmetric cells stable capacity retention Li/LiFePO4 cells, demonstrating potential viable cationic highway accelerating conduction.

Language: Английский

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Electrochemical Activation of Ordered Mesoporous Solid Electrolyte Interphases to Enable Ultra‐Stable Lithium Metal Batteries

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(4)

Published: Dec. 6, 2023

Abstract In Li metal batteries, the rational construction of artificial solid electrolyte interphase (ASEI) can homogenize Li‐ion flowing and Li‐mass plating/stripping, reinforce mechanical electrochemical stabilities electrode–electrolyte interface. Here, an ordered‐mesoporous powder zirconium oxophosphate (ZrOP) is proposed to construct a conductive ASEI by brushing ZrOP on metallic Li. The P‐induced amorphization in expected accelerate spontaneous lithiation reaction promote generation P‐contained conductors LiF domains during anode cycling. activation with promoted ionic conductivity interconnected porous network favorable for homogeneous nucleation growth grains (with ≈10 µm size), suppression dendrites volume expansion long‐term plating stripping. ZrOP‐modified symmetric cell enables long lifespan over 1600 h at 1 mA cm −2 , corresponding LiNi 0.8 Co 0.1 Mn O 2 (NCM811) based full displays stable cycling least 300 cycles capacity retention 80% C. modified thin foil (40 thickness) also multilayered pouch high‐loading NCM811 cathode reversible Ah.

Language: Английский

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Nanoconfining ultrafine heterostructured sulfides in carbon nanofibers enabling ultrastable and fast sodium storage

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 471, P. 144698 - 144698

Published: July 8, 2023

Language: Английский

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Manipulating dielectric property of polymer coatings toward high-retention-rate lithium metal full batteries under harsh critical conditions

Nano Research, Journal Year: 2023, Volume and Issue: 16(7), P. 9240 - 9249

Published: Feb. 19, 2023

Language: Английский

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Enhanced Electrochemical Performance of Rare-Earth Metal-Ion-Doped Nanocrystalline Li₄Ti₅O₁₂Electrodes in High-Power Li-Ion Batteries

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(17), P. 20925 - 20945

Published: April 17, 2023

A comprehensive and comparative exploration research performed, aiming to elucidate the fundamental mechanisms of rare-earth (RE) metal-ion doping into Li4Ti5O12 (LTO), reveals enhanced electrochemical performance nanocrystalline RE-LTO electrodes in high-power Li-ion batteries. Pristi ne (LTO) metal-doped Li4-x/3Ti5-2x/3LnxO12 (RE-LTO with RE = Dy, Ce, Nd, Sm, Eu; x ≈ 0.1) anode materials were synthesized using a simple mechanochemical method subsequent calcination at 850 °C. The X-ray diffraction (XRD) patterns pristine samples exhibit predominant (111) orientation along other characteristic peaks corresponding cubic spinel lattice. No evidence RE-doping-induced changes was seen crystal structure phase. average crystallite size for varies range 50-40 nm, confirming formation nanoscale crystalline revealing good efficiency ball-milling-assisted process adopted synthesize particles. Raman spectroscopic analyses chemical bonding indicate further validate phase structural quality addition corroborating XRD data formation. Transmission electron microscopy (TEM) that both particles have similar shape, but are better interconnected, which provide high specific surface area Li+-ion storage. detailed characterization confirms constitute promising deliver discharge capacities (in 172-198 mAh g-1 1C rate) than virgin LTO (168 g-1). Among them, Eu-LTO provides best capacity 198 rate. When cycled current rate 50C, all show nearly 70% their initial capacities, resulting higher capability (63%). results discussed this work unfold demonstrate derived via composition tailoring compounds application

Language: Английский

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