An Ion‐Channel‐Restructured Zwitterionic Covalent Organic Framework Solid Electrolyte for All‐Solid‐State Lithium‐Metal Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(30)

Published: April 18, 2023

Organic solid electrolytes offer an effective route for safe and high-energy-density all-solid-state Li metal batteries. However, it remains a challenge to devise new strategy promote the dissociation of strong ion pairs transport ionic components in organic electrolytes. Herein, zwitterionic covalent framework (Zwitt-COF) with well-defined chemical pore structures is prepared as electrolyte capable accelerating ions. The Zwitt-COF exhibits high room-temperature conductivity 1.65 × 10-4 S cm-1 wide electrochemical stability window. Besides, displays stable plating/stripping behavior via inhibition formation dendrites dead Li, leading superior long-term cycle performance retention 99% discharge capacity 98% Coulombic efficiency Li-metal battery. Theoretical simulations reveal that incorporation groups into COF can facilitate reconstruct AA-stacking configuration by dissociative adsorption Li+ ions on producing linear hexagonal channels electrolyte. This based provide alternative way construct various solid-state

Language: Английский

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In-Situ Formed Phosphorus Modified Gel Polymer Electrolyte with Good Flame Retardancy and Cycling Stability for Rechargeable Lithium Batteries

ACS Sustainable Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 11(11), P. 4498 - 4508

Published: March 7, 2023

The gel polymer electrolyte (GPE) is a promising substitution for traditional liquid electrolytes. However, GPE still troubled mainly by its sluggish ionic conductivity and inferior interfacial compatibility with electrodes. Herein, phosphorus-modified was fabricated in situ incorporation of black phosphorus (BP) nanosheets into poly(methyl methacrylate) (PMMA) matrix during the self-polymerization monomers. developed exhibited high (1.083 mS·cm–1 at 30 °C), an enhanced Li+ transference number (0.43), wide electrochemical stability window (5.2 V vs Li+/Li), while good thermal improved flame retardancy can also be achieved. Differential scanning calorimeter measurements confirmed that crystallinity PMMA not changed as BP were incorporated. Further investigation proved contained segments effectively immobilized anions to decrease coordination around Li+. As result, ion transport through facilitated, which promoted uniform stripping/plating lithium cycling symmetry cell. Based on GPE, Li|LiFePO4 Li|LiNi0.5Co0.2Mn0.3O2 batteries graphite|LiFePO4 soft-package battery encouraging performances safety properties.

Language: Английский

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New Insight into the Role of Fluoro-ethylene Carbonate in Suppressing Li-Trapping for Si Anodes in Lithium-Ion Batteries

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(10), P. 4193 - 4203

Published: Sept. 18, 2023

Fluoro-ethylene carbonate (FEC) is widely adopted as a film-forming electrolyte additive in Li-ion batteries and believed to promote the formation of stable LiF-rich solid interphase (SEI) on silicon electrode surfaces. In this work, different from traditional recognition, it found that role FEC suppressing Li-trapping more important than stabilizing SEI film. FEC-free electrolyte, growth rearrangement makes up for 47.8% capacity loss, remaining 52.2% related within Si particles. presence 10% FEC, loss reduced by 52.9%, while particles 82.3%. Microscopic studies demonstrate LiF-doping bulk phase main cause which effectively inhibits crystalline Li15Si4 thus reduces during electrochemical cycles. This new insight discloses hidden effect anode batteries.

Language: Английский

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PEO/Li1.25Al0.25Zr1.75(PO4)3 Composite Solid Electrolytes for High-Rate and Ultra-Stable All-Solid-State Lithium Metal Batteries with Impregnated Cathode Modification

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(4), P. 1289 - 1300

Published: Jan. 1, 2024

All-solid-state lithium metal batteries (ASSLMBs) are considered the most competitive next-generation energy storage due to their high density and safety.

Language: Английский

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Mechanisms of the Accelerated Li⁺ Conduction in MOF‐Based Solid‐State Polymer Electrolytes for All‐Solid‐State Lithium Metal Batteries

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(32)

Published: April 5, 2024

Solid polymer electrolytes (SPEs) for lithium metal batteries have garnered considerable interests owing to their low cost, flexibility, lightweight, and favorable interfacial compatibility with battery electrodes. Their soft mechanical nature compared solid inorganic give them a large advantage be used in pressure solid-state batteries, which can avoid the cost weight of cages. However, application SPEs is hindered by relatively ionic conductivity. In addressing this limitation, enormous efforts are devoted experimental investigation theoretical calculations/simulation new classes. Recently, metal-organic frameworks (MOFs) been shown effective enhancing ion transport SPEs. mechanisms Li

Language: Английский

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Recent progress in utilizing carbon nanotubes and graphene to relieve volume expansion and increase electrical conductivity of Si-based composite anodes for lithium-ion batteries

Carbon, Journal Year: 2024, Volume and Issue: 219, P. 118800 - 118800

Published: Jan. 8, 2024

Language: Английский

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Electrochemical coupling in subnanometer pores/channels for rechargeable batteries

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(8), P. 3829 - 3895

Published: Jan. 1, 2024

This review categorizes subnanometer pores/channels (SNPCs) from structural perspective and demonstrates electrochemical couplings in SNPCs for batteries while proposing corresponding challenges future research directions.

Language: Английский

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Advanced strategies for solid electrolyte interface design with MOF materials

Advanced Powder Materials, Journal Year: 2023, Volume and Issue: 3(1), P. 100154 - 100154

Published: Aug. 11, 2023

Emerging energy technologies, aimed at addressing the challenges of scarcity and environmental pollution, have become a focal point for society. However, these actualities present significant modern storage devices. Lithium metal batteries (LMBs) gained considerable attention due to their high density. Nonetheless, use liquid electrolytes raises safety concerns, including dendritic growth, electrode corrosion, electrolyte decomposition. In light challenges, solid-state (SSBs) emerged as highly promising next-generation solution by leveraging lithium anode achieve improved Metal organic frameworks (MOFs), characterized porous structure, ordered crystal frame, customizable configuration, garnered interest potential materials enhancing (SSEs) in SSBs. The integration MOFs into SSEs offers opportunities enhance electrochemical performance optimize interface between electrodes. This is made possible porosity, functionalized structures, abundant open sites MOFs. rational design high-performance MOF-based high-energy Li SSBs (LMSSBs) remains challenge. this comprehensive review, we an overview recent advancements LMSSBs, focusing on strategies optimization property enhancement. We categorize two main types: quasi-solid-state all electrolytes. Within categories, various subtypes are identified based combination mode, additional materials, formation state, preparation method, measures employed. review also highlights existing associated with MOF applications proposes solutions future development prospects guide advancement MOFs-based SSEs. By providing assessment aims offer valuable insights guidance SSEs, key issues faced technology.

Language: Английский

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Role of interfacial defect on electro‐chemo‐mechanical failure of solid‐state electrolyte

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(24)

Published: April 15, 2023

Abstract High‐stress field generated by electroplating of lithium (Li) in pre‐existing defects is the main reason for mechanical failure solid‐state electrolyte because it drives crack propagation electrolyte, followed Li filament growth inside and even internal short‐circuit if reaches another electrode. To understand role interfacial on an electro–chemo–mechanical model built to visualize distribution stress, relative damage, formation during electrochemical plating defects. Geometry defect found as dominating factor concentration local stress while semi‐sphere delivers less accumulation damage at initial stage longest time disintegration electrolyte. Aspect ratio, a key geometric parameter defect, investigated reveal its impact Pyramidic with low aspect ratio 0.2–0.5 shows branched region near interface, probably causing surface pulverization whereas high over 3.0 will trigger bulk The correction between expected provide insightful guidelines interface design high‐power‐density metal batteries.

Language: Английский

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Recent advances in lithium-rich manganese-based cathodes for high energy density lithium-ion batteries

Chemical Communications, Journal Year: 2023, Volume and Issue: 59(59), P. 9029 - 9055

Published: Jan. 1, 2023

This review provides an overview of the recent progress in lithium-rich manganese-based oxide cathodes for high energy density lithium ion batteries. The existing problems and main modification strategies are discussed.

Language: Английский

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