Separator-SEI interactions: Unlocking new pathways for lithium metal battery stability

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160998 - 160998

Опубликована: Фев. 1, 2025

Язык: Английский

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In Situ‐Constructed Multifunctional Composite Anode with Ultralong‐Life Toward Advanced Lithium‐Metal Batteries

Advanced Materials, Год журнала: 2024, Номер 36(41)

Опубликована: Авг. 17, 2024

Abstract Metallic lithium is the most competitive anode material for next‐generation high‐energy batteries. Nevertheless, extensive volume expansion and uncontrolled Li dendrite growth of metal not only cause potential safety hazards but also lead to low Coulombic efficiency inferior cycling lifespan Herein, a multifunctional dendrite‐free composite (Li/SnS 2 ) proposed through an in situ melt‐infusion strategy. In this configuration, 3D cross‐linked porous S/Li 22 Sn 5 framework facilitates rapid penetration electrolytes accommodates during repeated − plating process. Meanwhile, lithiophilic S phases with + transport barrier ensure preferential deposition, effectively avoiding uneven electron distribution. Moreover, conductors appropriate bonding ability guarantee charge mass transfer. Most importantly, steady skeleton sufficient inner interfaces (Li whole electrode, realizes redistribution localized free electron, contributing decomposition clusters, induces planar deposition model, thus restraining generation dendrites. Consequently, unprecedented cyclability over 6 500 h under ultrahigh areal capacity 10 mAh cm −2 current rate 20 mA achieved prepared anode. assembled Li/SnS ||LiFePO 4 (LFP) pouch full‐cells demonstrate remarkable capability convincing more than 000 cycles at C.

Язык: Английский

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Constructing a TiN/CNT lithiophilic scaffold for dendrite-free Li-metal anode

Carbon, Год журнала: 2024, Номер 222, С. 118999 - 118999

Опубликована: Фев. 29, 2024

Язык: Английский

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Tailoring Multiple Interactions in Poly (Urethane‐Urea)‐Based Solid‐State Polymer Electrolytes for Long‐Term Cycling Lithium Metal Batteries

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Abstract Polyethylene oxide (PEO)‐based solid polymer electrolytes (SPEs) are considered as one of the most promising candidates for next‐generation lithium metal batteries. However, their application is limited by poor electrode/electrolyte interfacial stability, low Li‐ions transference number, and weak mechanical strength. Herein, poly (urethane‐urea)‐based SPEs developed to enhance improve transport kinetics, provide superior properties. The (urethane‐urea) structure integrates abundant polar groups rigid conjugated moieties, which facilitate interactions with anions salt in SPEs, promoting number supporting formation a LiF‐rich electrolyte interphase (SEI) guide uniform deposition suppress dendrite growth. Furthermore, supramolecular crosslinked network formed through multiple hydrogen bonds π‐π stacking interactions, enhancing strength toughness SPEs. As result, Li//Li solid‐state symmetric cells assembled this SPE demonstrate stable cycling over 3000 h, while LiFePO 4 retain 93.6% initial capacity after 500 cycles at rate 1C. This work presents feasible design strategy developing highly functional materials.

Язык: Английский

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In Situ Plasma Polymerization of Self‐Stabilized Polythiophene Enables Dendrite‐Free Lithium Metal Anodes with Ultra‐Long Cycle Life

Small, Год журнала: 2024, Номер 20(31)

Опубликована: Март 9, 2024

Abstract Constructing a flexible and chemically stable multifunctional layer for the lithium (Li) metal anodes is highly effective approach to improve uneven deposition of Li + suppress dendrite growth. Herein, an organic protecting polythiophene in situ polymerized on via plasma polymerization. Compared with thiophene (C‐PTh), (P‐PTh), higher Young's modulus 8.1 GPa, shows strong structural stability due chemical binding Li. Moreover, nucleophilic C─S bond facilitates decomposition salts electrolytes, promoting formation LiF‐rich solid electrolyte interface (SEI) layers. The synergetic effect rigid LiF as well PTh‐Li can effectively regulate uniform growth dendrites during repeated stripping‐plating, enabling long‐cycling lifespan over 8000 h (1 mA cm −2 , 1 mAh −2) 2500 (10 10 ). Since polymerization facile (5–20 min) environmentally friendly (solvent‐free), this work offers novel promising strategy construction forthcoming generation high‐energy‐density batteries.

Язык: Английский

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Lithium difluoro(oxalate)borate as electrolyte additive to form uniform, stable and LiF-rich solid electrolyte interphase for high performance lithium ion batteries

Surfaces and Interfaces, Год журнала: 2024, Номер 48, С. 104297 - 104297

Опубликована: Апрель 4, 2024

Язык: Английский

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Stabilizing Lithium-Metal Host Anodes by Covalently Binding MgF₂ Nanodots to Honeycomb Carbon Nanofibers

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(4), С. 4530 - 4539

Опубликована: Янв. 19, 2024

Constructing lithiophilic carbon hosts has been regarded as an effective strategy for inhibiting Li dendrite formation and mitigating the volume expansion of metal anodes. However, limitation by conventional surface decoration methods over long-term cycling hinders their practical application. In this work, a robust host composed ultrafine MgF2 nanodots covalently bonded to honeycomb nanofibers (MgF2/HCNFs) is created through in situ solid-state reaction. The composite exhibits ultralight weight, excellent lithiophilicity, structural stability, contributing significantly enhanced energy efficiency lifespan battery. Specifically, strong covalent bond not only prevents from migrating aggregating but also enhances binding between Mg during molten infusion process. This allows stable regulation repeated plating/stripping. As result, MgF2/HCNF-Li electrode delivers high Coulombic 97% after 200 cycles, stably more than 2000 h. Furthermore, full cells with LiFePO4 cathode achieve capacity retention 85% 500 cycles at 0.5C. work provides guide dendrite-free deposition patterns toward development high-performance batteries.

Язык: Английский

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Artificial LiF‐Rich Interface Enabled by In situ Electrochemical Fluorination for Stable Lithium‐Metal Batteries

Angewandte Chemie, Год журнала: 2024, Номер 136(12)

Опубликована: Янв. 30, 2024

Abstract Lithium (Li)‐metal batteries are promising next‐generation energy storage systems. One drawback of uncontrollable electrolyte degradation is the ability to form a fragile and nonuniform solid interface (SEI). In this study, we propose use fluorinated carbon nanotube (CNT) macrofilm (CMF) on Li metal as hybrid anode, which can regulate redox state at anode/electrolyte interface. Due favorable reaction between plated CNTs, be directly LiF‐rich SEI during charging process, leading high Young's modulus (~2.0 GPa) fast ionic transfer (~2.59×10 −7 S cm −1 ). The obtained guide homogeneous plating/stripping electrochemical processes while suppressing dendrite growth. particular, endowed full cells with substantially enhanced cyclability allows for capacity retention (~99.3 %) remarkable rate capacity. This work extend fluorination technology into platform control artificial formation in Li‐metal batteries, increasing stability long‐term performance resulting material.

Язык: Английский

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Solid‐State Electrolytes for Lithium Metal Batteries: State‐of‐the‐Art and Perspectives

Advanced Functional Materials, Год журнала: 2024, Номер 35(1)

Опубликована: Окт. 31, 2024

Abstract The use of all‐solid‐state lithium metal batteries (ASSLMBs) has garnered significant attention as a promising solution for advanced energy storage systems. By employing non‐flammable solid electrolytes in ASSLMBs, their safety profile is enhanced, and the anode allows higher density compared to traditional lithium‐ion batteries. To fully realize potential solid‐state (SSEs) must meet several requirements. These include high ionic conductivity Li + transference number, smooth interfacial contact between SSEs electrodes, low manufacturing cost, excellent electrochemical stability, effective suppression dendrite formation. This paper delves into essential requirements enable successful implementation ASSLMBs. Additionally, representative state‐of‐the‐art examples developed past 5 years, showcasing latest advancements SSE materials highlighting unique properties are discussed. Finally, provides an outlook on achieving balanced improved addressing failure mechanisms solutions, critical challenges such reversibility plating/stripping thermal runaway, characterization techniques, composite SSEs, computational studies, ASS lithium–sulfur lithium–oxygen With this consideration, ASSLMBs can be realized.

Язык: Английский

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Garnet-based solid lithium metal batteries with ultralong lifespan enabled by solvent-free trifluoroacetic acid-induced interfacial engineering

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(23), С. 13830 - 13840

Опубликована: Янв. 1, 2024

A waste-to-treasure strategy is proposed to transform contaminant Li 2 CO 3 on LLZTO surface into LiF by solvent-free TFA. The formed lithophilic layer with high electron insulation contributes the realization of ultralong life batteries.

Язык: Английский

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