Integrated Gradient Cu Current Collector Enables Bottom‐Up Li Growth for Li Metal Anodes: Role of Interfacial Structure

Advanced Science, Journal Year: 2023, Volume and Issue: 10(23)

Published: June 13, 2023

3D Cu current collectors have been demonstrated to improve the cycling stability of Li metal anodes, however, role their interfacial structure for deposition pattern has not investigated thoroughly. Herein, a series integrated gradient Cu-based are fabricated by electrochemical growth CuO nanowire arrays on foil (CuO@Cu), where structures can be readily controlled modulating dispersities arrays. It is found that constructed sparse and dense dispersion both disadvantageous nucleation metal, consequently fast dendrite growth. In contrast, uniform appropriate dispersity enables stable bottom associated with smooth lateral deposition, affording ideal bottom-up pattern. The optimized CuO@Cu-Li electrodes exhibit highly reversible including coulombic efficiency up ≈99% after 150 cycles long-term lifespan over 1200 h. When coupling LiFePO4 cathode, coin pouch full-cells deliver outstanding rate capability. This work provides new insight design toward high-performance anodes.

Language: Английский

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Advances in graphene-based hosts for lithium metal anodes

Energy storage materials, Journal Year: 2024, Volume and Issue: 65, P. 103191 - 103191

Published: Jan. 13, 2024

Language: Английский

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Conformal 3D Li/Li₁₃Sn₅ Scaffolds Anodes for High‐Areal Energy Density Flexible Lithium Metal Batteries

Advanced Science, Journal Year: 2024, Volume and Issue: 11(14)

Published: Feb. 7, 2024

Abstract Achieving a high depth of discharge (DOD) in lithium metal anodes (LMAs) is crucial for developing areal energy density batteries suitable wearable electronics. Yet, the persistent growth dendrites compromises battery performance, and significant consumption during pre‐lithiation obstructs their broad application. Herein, A flexible 3D Li 13 Sn 5 scaffold designed by allowing molten to infiltrate carbon cloth adorned with SnO 2 nanocrystals. This design markedly curbs troublesome dendrite growth, thanks uniform electric field distribution swift + diffusion dynamics. Additionally, minimal nanocrystals loading (2 wt.%), only 0.6 wt.% consumed pre‐lithiation. Insights from situ optical microscope observations COMSOL simulations reveal that remains securely anchored within scaffold, result rapid mass/charge transfer distribution. Consequently, this electrode achieves remarkable DOD 87.1% at 10 mA cm −2 40 mAh . Notably, when coupled polysulfide cathode, constructed Li/Li @CC||Li S 6 /SnO @CC pouch cell delivers high‐areal capacity 5.04 an impressive areal‐energy 10.6 mWh The findings pave way toward development high‐performance LMAs, ideal long‐lasting

Language: Английский

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Bottom‐Up Magnesium Deposition Induced by Paper‐Based Triple‐Gradient Scaffolds toward Flexible Magnesium Metal Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(9)

Published: Nov. 3, 2023

Abstract The development of advanced magnesium metal batteries (MMBs) has been hindered by longstanding challenges, such as the inability to induce uniform (Mg) nucleation and inefficient utilization Mg foil. This study introduces a novel solution in form flexible, lightweight, paper‐based scaffold that incorporates gradient conductivity, magnesiophilicity, pore size. design is achieved through an industrially adaptable papermaking process which ratio carboxylated multi‐walled carbon nanotubes softwood cellulose fibers meticulously adjusted. triple‐gradient structure enables regulation ion flux, promoting bottom‐up deposition. Owing its high flexibility, low thickness, reduced density, potential applications flexible wearable electronics. Accordingly, electrodes exhibit stable operation for over 1200 h at 3 mA cm −2 /3 mAh symmetrical cells, markedly outperforming non‐gradient metallic alternatives. Notably, this marks first successful fabrication MMB pouch full cell, achieving impressive volumetric energy density 244 Wh L −1 . simplicity scalability design, uses readily available materials compatible process, open new doors production high‐energy‐density batteries.

Language: Английский

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Formation of N‐Doped Carbon Nanofibers Decorated with MoP Nanoflakes for Dendrite‐Free Lithium Metal Anode

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: May 7, 2024

Abstract Metallic lithium (Li) is recognized as a promising candidate for anode material of Li‐ion batteries owing to high theoretical specific capacity and low redox potential. However, uncontrollable dendrite growth huge volume expansion during Li plating/stripping processes hinder its practical application. Herein, N‐doped carbon nanofibers@MoP nanoflakes (NCNF@MoP) developed potential host address the above challenges. During formation solid electrolyte interphase, MoP can be changed into metallic Mo with lithiophilicity 3 P ionic conductivity. The whole composite transformed mixed ion/electron conducting network reduce nucleation overpotential accelerate diffusion kinetics at electrode/electrolyte interface. As proof concept, symmetric cell using NCNF@MoP presents long‐term cycling up 2500 h 10 mV 1 mA cm −2 . Additionally, Li‐NCNF@MoP||LiFePO 4 full demonstrates good retention 92.6% over 2200 cycles current density 5 C (1 = 169 g −1 ).

Language: Английский

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Sustainable Dual‐Layered Interface for Long‐Lasting Stabilization of Lithium Metal Anodes

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(48)

Published: Nov. 12, 2023

Abstract Lithium metal anodes (LMAs) offer substantial promise for high‐energy‐density rechargeable batteries, but managing the complex electrolyte–anode interface is a challenge. Herein, sustainable dual‐layered (SDI) protected Li anode developed using joint electrospinning‐rolling technique. In this SDI, polyacrylonitrile (PAN) nanofibers normalize Li‐ion flux across bulk electrolyte and mitigate electrode volume expansion. More significantly, continuous release of lithiophilic ions aids in constructing alloy interphase situ, which facilitates transport uniform lithium deposition. With dynamic protection SDI films, cracks layer can be promptly repaired during cycling, ensuring efficient control prolonged stabilization LMAs. As validation, PAN/SnCl 2 film as an prototype, symmetric cells achieve ultra‐long cycling 5200 h (≈7 months) at 5 mA cm −2 mAh . When paired with sulfur cathode (in ether electrolyte) or LiNi 0.8 Co 0.1 Mn O ester electrolyte), full exhibit exceptional stability rate performance. This strategy LMAs opens path to suppress dendrite growth, creating new opportunities advanced batteries.

Language: Английский

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Li-current collector interface in lithium metal batteries

Nano Research, Journal Year: 2024, Volume and Issue: 17(10), P. 8706 - 8728

Published: July 24, 2024

Language: Английский

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Co@CoO core–shell cross-linked framework modified 3D Cu for dendrite-free lithium anode

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 491, P. 151922 - 151922

Published: May 5, 2024

Language: Английский

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Unlocking the Potential of Li-Ag Alloys: Phase Selection and Practical Application

Energy Material Advances, Journal Year: 2024, Volume and Issue: 5

Published: Jan. 1, 2024

Dendrite formation, contact loss, and continuous formation of the solid electrolyte interphase (SEI) preclude practical use energy-dense lithium (Li) metal. Li–Ag alloys have potential to address these issues due their exceptional lithiophilicity, outstanding mechanical stability, moderate chemical stability. This study evaluates all phases in phase diagram based on lithiation capacity, Li insertion, property, Our findings suggest that 4 Ag is most promising phase, Gibbs free energy nucleation (∆ G nucle ) for 3 5 orders magnitude smaller compared pure Li, resulting uniform deposition behavior. We proposed applications within or from 9 phases, which may provide a usable capacity 409 696 mAh/g, respectively. Experiments indicate exhibits not only smallest impedance but also highest retention Li. The provides valuable guidance selection application Li-containing future battery development.

Language: Английский

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Advanced engineering strategies for Li₂S cathodes in lithium–sulfur batteries

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(48), P. 26318 - 26339

Published: Jan. 1, 2023

This review comprehensively explores the diverse strategies of Li 2 S engineering and examines potential avenues for enhancing structural stability electrochemical performance.

Language: Английский

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