A “Flexible” Solvent Molecule Enabling High‐Performance Lithium Metal Batteries

Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

Electrolyte chemistries are crucial for achieving high cycling performance and energy density in lithium metal batteries. The localized high-concentration electrolytes (LHCEs) exhibit good However, understanding how the intermolecular interactions between solvents diluents electrolyte regulate solvation structure interfacial layer remains limited. Here, we reported a new LHCE which strong hydrogen bonding alters conformation polarity of "flexible" solvent molecules, thereby effectively regulating Li+ ion promoting formation robust electrode interfaces. endpoint H chain O-CH-CH3 2,5-dimethyltetrahydrofuran (2,5-THF) F benzotrifluoride (BTF) diluent can form bonds, expand maximum bond angle 2,5-THF molecule from 119° to 123°. expanded increases steric hindrance decreases its polarity. This leads an increase anion content within structure, turn enhances both anode sulfurized polyacrylonitrile (SPAN) cathode. As result, shows Coulombic efficiency (CE) as 99.4 %. assembled Li||SPAN battery based on our developed exhibits impressive stability with average CE 99.8 % over 700 cycles. Moreover, pouch cell be stably cycled 301.4 Wh kg-1. molecular-level correlation molecular structures provides insights into design advanced LHCEs high-performance

Язык: Английский

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A review of functional group selection and design strategies for gel polymer electrolytes for metal batteries

Materials Science and Engineering R Reports, Год журнала: 2025, Номер 164, С. 100973 - 100973

Опубликована: Март 9, 2025

Язык: Английский

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Solvent‐Free Dry‐Process Enabling High‐Areal Loading Selenium‐Doped SPAN Cathodes Toward Practical Lithium–Sulfur Batteries

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 7, 2025

Abstract In this study, a selenium‐doped sulfurized polyacrylonitrile (Se‐SPAN) cathode fabricated by dry process with multi‐walled carbon nanotubes (MWCNT) and polytetrafluoroethylene (PTFE) binder is proposed to address issues in currently developed dry‐processed cathodes. The Se‐SPAN (D/Se‐SPAN) characterized dense, robust, uniform structure that successfully resists the internal stress evolution caused significant volume variations of under high‐loading conditions. Understanding these architectural advantages D/Se‐SPAN, unrivaled potential D/Se‐SPAN compared traditional slurry‐processed cathodes (S/Se‐SPAN) established through series in‐depth electrochemical‐mechanical investigations. As result, recorded ≈31.8 mAh cm −2 reversible areal capacities ultra‐high‐loading conditions (64.2 mg ) exhibited remarkable cycle stability. Based on vital design guidelines are provided for developing S‐based crucial realizing cost‐effective eco‐friendly battery production.

Язык: Английский

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Confined Tandem Catalytic Quasi-Solid Sulfur Reversible Conversion for All-Solid-State Na-S Batteries

Energy & Environmental Science, Год журнала: 2024, Номер 17(14), С. 5273 - 5282

Опубликована: Янв. 1, 2024

The designed york–shell structured MnHCF/PPy@MnO 2 coaxial nanotubes cooperatively catalyze the conversion of interchannel encapsulated active species within confined environment, regulating reversible quasi-solid sulfur conversion.

Язык: Английский

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Leveraging polymer architecture design with acylamino functionalization for electrolytes to enable highly durable lithium metal batteries

Energy & Environmental Science, Год журнала: 2024, Номер 17(18), С. 6739 - 6754

Опубликована: Янв. 1, 2024

A novel polymer architecture design for GPEs is proposed via in situ copolymerization of VC and a new acylamino-crosslinker. This enables accelerated Li + transport dual-reinforced stable interfaces, contributing to long-lifespan LMBs.

Язык: Английский

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A “Flexible” Solvent Molecule Enabling High‐Performance Lithium Metal Batteries

Angewandte Chemie, Год журнала: 2025, Номер unknown

Опубликована: Янв. 31, 2025

Abstract Electrolyte chemistries are crucial for achieving high cycling performance and energy density in lithium metal batteries. The localized high‐concentration electrolytes (LHCEs) exhibit good However, understanding how the intermolecular interactions between solvents diluents electrolyte regulate solvation structure interfacial layer remains limited. Here, we reported a new LHCE which strong hydrogen bonding alters conformation polarity of “flexible” solvent molecules, thereby effectively regulating Li + ion promoting formation robust electrode interfaces. endpoint H chain O‐CH‐CH 3 2,5‐dimethyltetrahydrofuran (2,5‐THF) F benzotrifluoride (BTF) diluent can form bonds, expand maximum bond angle 2,5‐THF molecule from 119° to 123°. expanded increases steric hindrance decreases its polarity. This leads an increase anion content within structure, turn enhances both anode sulfurized polyacrylonitrile (SPAN) cathode. As result, shows Coulombic efficiency (CE) as 99.4 %. assembled Li||SPAN battery based on our developed exhibits impressive stability with average CE 99.8 % over 700 cycles. Moreover, pouch cell be stably cycled 301.4 Wh kg −1 . molecular‐level correlation molecular structures provides insights into design advanced LHCEs high‐performance

Язык: Английский

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A Skin‐Mimicked Polymer Gel Electrolyte for Stabilizing Lithium Metal Batteries

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 19, 2025

Abstract The electrolytes for advanced lithium‐metal batteries need to simultaneously achieve high‐performances in ion‐conductivity, lithium‐ion transference number, elasticity and mechanical strength, safety etc. Gel polymer (GPEs) are promising, however, conventional GPEs find it challenging all these performances, mainly due a poor control of the liquid plasticizer inside. Here, inspired by animal skins that can perfectly overcome trade‐off between mechanics complex biofunctions via water‐encapsulation inside cellular network, is attempted design fabricate type skin‐inspired nonflammable elastic GPE (SINE‐GPE) address this challenge. To do that, an anti‐solvent induced self‐assembly (ASISA) strategy proposed porous vesicular membrane based on triblock thermoplastic polyurethane (i.e., SINE‐skeleton). Then, electrolyte encapsuled SINE‐skeleton prepare SINE‐GPE. resultant SINE‐GPE achieves not only high gel‐strength 2.0 ± 0.1 MPa, recoverable strain 90% ionic conductivity 1.2 × 10 −3 S cm −1 at RT, but also selective transport (t Li+ = 0.82). Consequently, effectively stabilize anode with smooth solid‐electrolyte‐interphase, which explained self‐massaging mechanism during lithium stripping deposition.

Язык: Английский

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Regulating Interfacial Wettability for Fast Mass Transfer in Rechargeable Metal-Based Batteries

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Фев. 26, 2025

The interfacial wettability between electrodes and electrolytes could ensure sufficient physical contact fast mass transfer at the gas-solid-liquid, solid-liquid, solid-solid interfaces, which improve reaction kinetics cycle stability of rechargeable metal-based batteries (RMBs). Herein, engineering multiphase interfaces is summarized from electrolyte electrode aspects to promote interface rate durability RMBs, illustrates revolution that taking place in this field thus provides inspiration for future developments RMBs. Specifically, review presents principle macro- microscale summarizes emerging applications concerning effect on Moreover, deep insight into development provided outlook. Therefore, not only insights but also offers strategic guidance modification optimization toward stable electrode-electrolyte

Язык: Английский

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Lightweight Materials for High Energy Density Lithium–Sulfur Batteries

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 28, 2025

Abstract At present, electronic devices such as electric vehicles and mobile phones have increasing requirements for battery energy density. Lithium–sulfur batteries (LSBs) a high theoretical density are considered potential choice realizing the next generation of (2600 W h kg −1 ) batteries. However, actual LSBs is much lower than due to poor conductivity sulfur, serious LiPSs shuttle, low sulfur utilization, so on. Many lightweight materials characterized by surface area designability. The reasonable design modify can reduce proportion inactive substances optimizing electrochemical performance, which crucial improving LSBs. few reviews discuss effect on from perspective whole system. Herein, application in six aspects: liquid electrolyte, solid cathode, anode, separator, current collector discussed. significance use further improvement summarized prospected.

Язык: Английский

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Melamine foam-derived N-doped carbon framework and graphene-supported sulfurized polyacrylonitrile for high performance lithium‑sulfur battery cathode

Journal of Energy Storage, Год журнала: 2025, Номер 118, С. 116330 - 116330

Опубликована: Март 22, 2025

Язык: Английский

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