Tandem Design of Functional Separators for Li Metal Batteries with Long‐Term Stability and High‐Rate Capability

Advanced Functional Materials, Год журнала: 2023, Номер 33(43)

Опубликована: Июнь 26, 2023

Abstract The lithium (Li) dendrite growth seriously hinders the applications of metal batteries (LMBs). Numerous methods have been proposed to restrict formation Li dendrites by improving Li‐ion transference number (t + ) through separator modification according Sand's time equation. However, ignoring positive contribution anion motion solid electrolyte interphase (SEI) will result in insufficient inorganic components, which impedes practical implementation LMBs. Herein, a “tandem” is constructed (ZSM‐5‐Poly dimethyl diallyl ammonium chloride (PDDA)/Polyethylene (PE)/SbF 3 ), anchored anions and built an inorganic‐rich SEI at same time. resulting from SbF (SBF) coating on side facing rich Li‐Sb alloy (Li Sb) LiF. Sb can significantly reduce migration energy barrier ion facilitate transport. Simultaneously, ZSM‐5‐PDDA (Z5P) other effectively immobilize increase t . Moreover, regular pore structure conducive homogenizing flux also capable uniform temperature distribution, safety. Hence, lifespan Li|Li Li|Cu cells assemble with Z5P/PE/SBF extended. In addition, full LiNi 0.8 Co 0.1 Mn O 2 (NCM811) LiFePO 4 (LFP) cathodes show excellent cycle stability superior rate performance.

Язык: Английский

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Experimental Investigation on Reversible Swelling Mechanisms of Lithium-Ion Batteries under a Varying Preload Force

Batteries, Год журнала: 2023, Номер 9(4), С. 218 - 218

Опубликована: Апрель 4, 2023

The safety of lithium-ion batteries has to be guaranteed over the complete lifetime considering geometry changes caused by reversible and irreversible swellings degradation mechanisms. An understanding pressure distribution gradients is necessary optimize battery modules avoid local bearing risk safety-relevant changes. In this study, two fresh pouch cells was measured with an initial preload force 300 or 4000 N. Four identical were electrochemically aged a N force. thickness change during aging. After aging, swelling behavior investigated draw conclusions on how affected aging behavior. A novel test setup developed measure cell without contact high precision. results suggested that applied surface. found affect locality swelling. Positions suffering from large variations increased strongly in terms their particular, edges showed strong increase peaks.

Язык: Английский

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Mechanically Interlocked Interphase with Energy Dissipation and Fast Li‐Ion Transport for High‐Capacity Lithium Metal Batteries

Advanced Materials, Год журнала: 2024, Номер 36(23)

Опубликована: Фев. 21, 2024

Constructing an artificial solid electrolyte interphase (ASEI) on Li metal anodes (LMAs) is a potential strategy for addressing the dendrite issues. However, mechanical fatigue of ASEI caused by stress accumulation under repeated deformation from plating/stripping not taken seriously. Herein, this work introduces mechanically interlocked [an]daisy chain network (

Язык: Английский

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Advanced Crosslinked Solid Polymer Electrolytes: Molecular Architecture, Strategies, and Future Perspectives

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 17, 2024

Abstract Solid‐state batteries (SSBs) have attracted much attention for high‐energy‐density and high‐safety energy storage devices. Solid polymer electrolytes (SPEs) emerged as a critical component in the advancement of SSBs, owing to compelling advantages strong molecular structure‐designability, low cost, easy manufacturing, no liquid leakage. However, linear SPEs usually room‐temperature ionic conductivity due crystallization, melting at high temperature. Thus, crosslinked been proposed that chemical bonding between internal molecule chains can maintain solid state expand operational temperature, disrupt regularity segment, diminish crystalline degree, leading an enhancement conductivity. Furthermore, integration functional groups within SPE network significantly augment electrochemical performance SPEs. Herein, according structure, are categorized into four types: simple network, AB polymers (ABCP), semi‐interpenetrating (semi‐IPN), interpenetrating (IPN), then structure features disadvantages commonly used these types reviewed. In addition, with self‐healing, flame‐retardant, degradable, recyclability introduced. Finally, challenges prospects summarized, hoping provide guidance design future.

Язык: Английский

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Assembly and Utility of a Drawstring‐Mimetic Supramolecular Complex

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(8)

Опубликована: Янв. 2, 2024

Abstract Inspired by the drawstring structure in daily life, here we report development of a drawstring‐mimetic supramolecular complex at molecular scale. This consists rigid figure‐of‐eight macrocyclic host molecule and flexible linear guest which could interact through three‐point non‐covalent binding to form highly selective efficient host‐guest assembly. The not only resembles structure, but also mimics properties with regard deformations under external forces. can be utilized as an interlocked crosslinker for poly(methyl acrylate), corresponding polymer samples exhibit comprehensive enhancement macroscopic mechanical performance including stiffness, strength, toughness.

Язык: Английский

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Mobility Control of Mechanical Bonds to Modulate Energy Dissipation in Mechanically Interlocked Networks

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

Mechanically interlocked networks (MINs) with dense mechanical bonds can amplify the dynamic behaviors of to exhibit decent properties. Energy dissipation resulting from bond motion is essential for improving toughness, yet effective strategies optimize this process remain underexplored. Here, by designing models controllable mobility, we establish a fortification strategy two key factors governing energy dissipation, host–guest recognition and sliding friction, thereby enabling property enhancement mechanically materials. Specifically, [2]rotaxanes in MIN-1 MIN-2 identical axle structures, incorporating small benzo-21-crown-7 ring large benzo-24-crown-8 ring. Strain rate-dependent cyclic tensile tests reveal that required drive 510 260 kJ/m3, respectively, indicating wheel size enhances recognition. Furthermore, apparent activation (11.0 kJ/mol) higher than (6.70 kJ/mol), suggesting increased friction MIN-1. Due these aspects, exhibits superior performance (damping capacity = 92%) compared (78%), translating toughness (7.50 vs 5.70 MJ/m3).

Язык: Английский

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Creating electrostatic shielding effects through dual-salt strategy to regulate coordination environment of Li⁺ and realize high-performance all-solid-state lithium metal batteries

Energy storage materials, Год журнала: 2025, Номер unknown, С. 104210 - 104210

Опубликована: Март 1, 2025

Язык: Английский

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Fabrication of a Biomass-Derived Activated Carbon-Based Anode for High-Performance Li-Ion Batteries

Micromachines, Год журнала: 2023, Номер 14(1), С. 192 - 192

Опубликована: Янв. 12, 2023

Porous carbons are highly attractive and demanding materials which could be prepared using biomass waste; thus, they promising for enhanced electrochemical capacitive performance in capacitors cycling efficiency Li-ion batteries. Herein, (rice husk)-derived activated carbon was synthesized via a facile chemical route used as anode Various characterization techniques were to study the structural morphological properties of carbon. The possessed structure with certain degree amorphousness. morphology spherical shape particle size ~40-90 nm. Raman studies revealed characteristic peaks present evaluated fabricated coin cell showed that delivered discharge capacity ~321 mAhg-1 at current density 100 mAg-1 first cycle, maintained ~253 400 cycles. retention found higher (~81%) 92.3% coulombic even after cycles, excellent cyclic reversibility stability compared commercial These results allow waste biomass-derived overcome problem performance. This provides an insight fabrication anodes from rice husk can redirected into creating valuable renewable energy storage devices future, product socially ethically acceptable product.

Язык: Английский

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Designing weakly and strongly solvating polymer electrolytes: Systematically boosting high‐voltage lithium metal batteries

SusMat, Год журнала: 2024, Номер 4(4)

Опубликована: Июль 10, 2024

Abstract Practical high‐voltage lithium metal batteries hold promise for high energy density applications, but face stability challenges in electrolytes both 4 V‐class cathodes and anode. To address this, we delve into the positive impacts of two crucial moieties electrolyte chemistry: fluorine atom (‐F) cyano group (‐CN) on electrochemical performance polyether batteries. Cyano‐bearing possess strong solvation, accelerating Li + desolvation with minimal SEI impact. Fluorinated weak stabilize anode via preferential decomposition F‐segment, exhibiting nearly 6000‐h stable cycling symmetric cell. Furthermore, electron‐withdrawing properties ‐F ‐CN groups significantly bolster tolerance copolymer electrolyte, extending its operational range up to 5 V. This advancement enables development compatible various cathodes, including 4.45 V LiCoO 2 , 4.5 LiNi 0.8 Co 0.1 Mn O 4.2 0.5 0.2 0.3 . These findings provide insights design principles centered around polymer components high‐performance electrolytes.

Язык: Английский

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Hyperbranched Vitrimer for Ultrahigh Energy Dissipation

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(28)

Опубликована: Апрель 24, 2024

Abstract Polymers are ideally utilized as damping materials due to the high internal friction of molecular chains, enabling effective suppression vibrations and noises in various fields. Current strategies rely on broadening glass transition region or introducing additional relaxation components enhance energy dissipation capacity polymeric materials. However, it remains a significant challenge achieve efficiency through structural control while maintaining dynamic characteristics. In this work, we propose new strategy develop hyperbranched vitrimers (HBVs) containing dense pendant chains loose crosslinked networks. A novel yet weak transesterification between carboxyl boronic acid ester was confirmed used prepare HBVs based poly (hexyl methacrylate‐2‐(4‐ethenylphenyl)‐5,5‐dimethyl‐1,3,2‐dioxaborinane) P(HMA‐ co ‐ViCL) copolymers. The ‐type macromonomers, crosslinking points formed by covalent connection via associative exchange, exchange reaction three keys developing high‐performance HBV We found that 20k‐40‐60 exhibited ultrahigh energy‐dissipation performance over broad frequency temperature range, attributed synergistic effect crosslinks. This unique design concept will provide general approach advanced

Язык: Английский

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