Covalent Organic Framework-Based Materials for Advanced Lithium Metal Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(27), P. 17439 - 17468

Published: June 27, 2024

Lithium metal batteries (LMBs), with high energy densities, are strong contenders for the next generation of storage systems. Nevertheless, unregulated growth lithium dendrites and unstable solid electrolyte interphase (SEI) significantly hamper their cycling efficiency raise serious safety concerns, rendering LMBs unfeasible real-world implementation. Covalent organic frameworks (COFs) derivatives have emerged as multifunctional materials significant potential addressing inherent problems anode electrode metal. This stems from abundant metal-affine functional groups, internal channels, widely tunable architecture. The original COFs, derivatives, COF-based composites can effectively guide uniform deposition ions by enhancing conductivity, transport efficiency, mechanical strength, thereby mitigating issue dendrite growth. review provides a comprehensive analysis derived employed challenges posed in LMB. Additionally, we present prospects recommendations design engineering architectures that render feasible practical applications.

Language: Английский

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Designing Organic–Inorganic Hybrid Materials to Construct a Complementary Interface with Versatility for Li–S Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 3, 2024

Abstract Polysulfides shuttle and lithium dendrites growth greatly restricts the practical application of lithium–sulfur batteries (LSBs). A rational designed separator combined polysulfide catalyst regulator can achieve effect killing two birds with one stone. Herein, organic–inorganic hybrid materials are to construct a complementary interface for LSBs. Specially, kinds covalent organic frameworks (COF) different pore size in situ grown on MXene surface by forming Ti–N bond. The high electronic conductivity abundant functional groups allow it work as effectively accelerate polysulfides conversion, while COF be used an ion calibrator guide homogeneous deposition. As expected, MXene@COF (MCOF) integrated realizes advantages that enable Li||Li symmetric cell surprisingly stable plating/stripping process up 4750 h at 10 mA cm −2 . Furthermore, assembled LSBs exhibit capacities 584/563 mAh g −1 3 C low‐capacity decay rates 0.042%/0.048% per cycle after 1000 cycles 1 C. This proposes strategy based composites layer, which is great significance construction high‐performance

Language: Английский

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Functional Separators for Modulating Li‐Ion Flux Toward Uniform Li Deposition: A Review

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(38)

Published: July 27, 2024

Abstract Homogeneous Li‐ion flux is a significant precondition of uniform deposition in Li metal batteries (LMBs). Numerous methodologies have been presented for homogenizing before based on the features deposition. Separators that provide transfer channels and are directly exposed to anodes attracted rising attention their role guiding regular distribution. More novel functional separators proposed aiming achieve dendrite‐free Herein, factors strategies regulate distribution through toward LMBs concentrated on. The current mechanisms regulation by first highlighted, including physical properties, interactions with electrolyte, modification solid‐state electrolyte interphase. According these mechanisms, separator regulating divided into three methodologies, typical examples introduced. Finally, limitations suggestions future studies presented, inspire engaged researchers newcomers trigger more exciting works this area.

Language: Английский

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Anions‐Trappable Hollow Mesoporous Nanoparticle Coating Enables High‐Performance and Safe Lithium Metal Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 9, 2024

Abstract Polyolefin separators, such as polypropylene (PP) and polyethylene (PE) are the commonly used separators for lithium batteries, which have good mechanical properties chemical/electrochemical stability, but their high‐temperature dimensional stability is poor Li + transference number ( t ) low. Recently, much attention has been paid to developing with new substrates, so far there no separator replace polyolefin large‐scale application. Therefore, surface modification of enhance its functionality a simple effective method. Among many modified layers, porous layer can store electrolyte provide enough space ion transport. In this work, hollow mesoporous silica nanosphere (mSiO 2 prepared PP multifunctional coating improve electrochemical performance safety separator. The experimental theoretical results show that mSiO not only wettability separator, also promote transport, /PP exhibits high ionic conductivity (2.35 mS cm −1 (0.63). As result, Li//LiFePO 4 cells using exhibit excellent cycling performance, rate safety.

Language: Английский

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Design of High-Performance Formyl-Functionalized COF Aerogels as Quasi-Solid Lithium Battery Electrolyte by a Solvent Substitution Strategy

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(28), P. 37052 - 37062

Published: July 5, 2024

Covalent organic framework (COF) aerogels with functional groups offer exceptional processability and functionality for various applications. These hierarchical porous materials combine the advantages of COFs benefits aerogels, overcoming limitations conventional insoluble nonfusible COF powders. However, achieving both high crystallinity shape retention remains a challenge functionalized aerogels. In this work, we develop novel general solvent substitution method one-step synthesis formyl-functionalized without harsh vacuum conditions. exhibit excellent processing capabilities, superior mechanical strength, enhanced functionality. As proof-of-concept, they were used in adsorption lithium metal battery applications, significantly maximizing structural COFs, e.g.: (i) structure is fully wetted by electrolyte to form continuous transport channels; (ii) polar groups, which are easier be acquired, help desolvation transfer Li+; (iii) regular pore structures stabilize deposition Li+ inhibit growth dendrites. combined contribute lighter improved energy density safety.

Language: Английский

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Direct Epitaxial Growth of Polycrystalline MOF Membranes on Cu Foils for Uniform Li Deposition in Long‐life Anode‐free Li Metal Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 24, 2024

Anode-free Li-metal battery (AFLMB) is being developed as the next generation of advanced energy storage devices. However, low plating and stripping reversibility Li on Cu foil prevents its widespread application. A promising avenue for further improvement to enhance lithophilicity foils optimise their surfaces through a metal-organic framework (MOF) functional layer. excessive binder usage in current approaches obscures active plane MOF, severely limiting performance. In response this challenge, MOF polycrystalline membrane technology has been integrated into field AFLMB work. The dense seamless HKUST-1 was deposited (HKUST-1 M@Cu) via an epitaxial growth strategy. contrast traditional layers, binder-free fully exposes lithophilic sites, effectively reducing nucleation overpotential optimising deposition quality Li. Consequently, layer becomes denser, eliminating effects dendrites. When coupled with LiFePO

Language: Английский

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High-strength elastomer separator for high-current-density-charging lithium metal batteries

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(2)

Published: Jan. 13, 2025

Utilizing lithium metal as an anode in batteries has been expected to replace conventional lithium-ion batteries. However, the mechanical properties and electrochemical performance of current separators do not meet requirements for practical applications (LMBs). Here, we report elastomer separator with interconnected structure plastic-crystal-embedded garnet-conductor-regulated thermoplastic polystyrene-b-poly(ethylene-r-butylene)-b-polystyrene integrated polyethylene matrix. The 14-micron-thick show a combination excellent elongation ∼115.2% sufficiently high tensile strength ∼56 MPa. accommodate volume changes block dendrites high-current-density cycling LMBs. As demonstration, enable stable operation LMBs under stringent conditions, loading 18 mg cm−2 LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode at extremely charging/discharging density 1.8 mA cm−2, delivering reversible capacity 164 mAh g−1 retention 88% after 140 cycles.

Language: Английский

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Multilayer Separator-Driven Interface Stabilization and Dendrite Suppression for Long-Cycling Lithium Metal Batteries

Published: Jan. 1, 2025

Language: Английский

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Multifunctional Covalent Organic Frameworks for Zinc Metal Anodes

CleanMat., Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 4, 2025

ABSTRACT Aqueous zinc‐ion batteries (AZIBs) are one promising electrochemical energy storage system attributed to their high theoretical capacity, relatively low cost as well safety. Nevertheless, the formation for zinc dendrites at anode side severely impedes performance. Covalent organic frameworks (COFs), porous materials, possess some broad application prospects in advanced and conversion systems they have demonstrated versatility settling issues metal anodes. In this current review, multifunctionality of COFs is reviewed. The overview toward anodes firstly overviewed. Then, multifunctional covalent stable summarized. By construction nanoporous structure, introduction negative charges utilization zincophilic properties, could act protective layers ZIBs. addition, been utilized separators electrolytes AZIBs. Finally, perspective highly AZIBs presented. This review plat a platform materials high‐energy‐density batteries.

Language: Английский

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Covalent organic frameworks for high-performance rechargeable lithium metal batteries: Strategy, mechanism, and application

Progress in Materials Science, Journal Year: 2025, Volume and Issue: unknown, P. 101455 - 101455

Published: Feb. 1, 2025

Language: Английский

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