Photoexcitation‐Enhanced High‐Ionic Conductivity in Polymer Electrolytes for Flexible, All‐Solid‐State Lithium‐Metal Batteries Operating at Room Temperature

Angewandte Chemie, Год журнала: 2024, Номер unknown

Опубликована: Окт. 29, 2024

Abstract Designing solid polymer electrolytes (SPEs) with high ionic conductivity for room‐temperature operation is essential advancing flexible all‐solid‐state energy storage devices. Innovative strategies are urgently required to develop SPEs that safe, stable, and high‐performing. In this work, we introduce photoexcitation‐modulated heterojunctions as catalytically active fillers within SPEs, guided by photocatalytic design principles, meanwhile employ natural bacterial cellulose improve the compatibility poly(ethylene oxide), coordination environment of lithium salts, optimize both ion transport mechanical properties. situ photothermal experiments theoretical calculations reveal strong photogenerated electric field produced trace oxide) under photoexcitation significantly enhances salt dissociation, increasing concentration mobile Li + . This results in a substantial increase conductivity, reaching 0.135 mS cm −1 at 25 °C, transference number 0.46. The lithium‐metal pouch cells exhibit an impressive discharge capacity 178.8 mAh g even after repeated bending folding, demonstrate exceptional long‐term cycling stability, retaining 86.7 % their initial 250 cycles 1 C (25 °C). research offers novel approach developing high‐performance batteries.

Язык: Английский

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Enhancing Quasi-Solid-State Lithium-Metal Battery Performance: Multi-Interlayer, Melt-Infused Lithium and Lithiophilic Coating Strategies for Interfacial Stability in Li||VS₂-DSGNS-LATP|PEO–PVDF||NMC622-Al₂O₃ Systems

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер unknown

Опубликована: Дек. 26, 2024

The development of quasi-solid-state lithium metal batteries (QSSLMBs) is hindered by inadequate interfacial contact, poor wettability between electrodes and electrolytes, significant volume changes during long-term cycling, leading to safety risks cataclysmic failures. Here, we report an innovative approach enhance properties through the in situ construction QSSLMBs. A multilayer design integrates a microwave-synthesized Li1.3Al0.3Ti1.7(PO4)3 (LATP) ceramic electrolyte, which surface-coated with lithiophilic conductive ink comprising VS2 disulfonated functionalized graphene nanosheets (VS2-DSGNS) using low-cost nail-polish binder. Subsequently, few drops LiPF6 EC/DMC liquid electrolyte (LE) are impregnated into uncoated side LATP surface. pellet LATP-VS2-DSGNS surface was allowed be contact molten Li held until flowed completely via "melt-infusion strategy" as anode side. Additionally, heterogeneous polymer matrix consisting poly(ethylene oxide) (PEO) poly(vinylidene difluoride) (PVDF) interlayer fabricated solution casting technique for improving LE cathode, overall charge transfer kinetics. assembled symmetric cells, Li||LATP-VS2-DSGNS||Li Li||PEO–PVDF/LE-LATP||Li, demonstrate high lithium-ion conductivities 3.69 × 10–4 1.02 10–3 S cm–1, respectively, impressive numbers 0.84 0.93 at 25 °C. Both cells exhibit highly reversible stripping/plating cycling process over 600 h, minimal voltage polarization 10 31.6 mV, across broad redox window (−1 6 V), effectively inhibiting dendrite formation. Furthermore, combination surface-modified Al2O3 dry-coated, high-nickel NMC622 cathode PEO–PVDF|LATP-VS2-DSGNS||Molten-Li architecture CR2032 coin-type full-cell delivers galvanostatic discharge capacity 130.6 mAh g–1 1C rate after 200 cycles, achieving 84.3% retention, thereby demonstrating substantial reduction resistance enhanced stable battery performance

Язык: Английский

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Highly Reversible Zn Metal Anode Enabled by Interfacial Water Pocket

Energy & Fuels, Год журнала: 2024, Номер 38(17), С. 17038 - 17044

Опубликована: Авг. 21, 2024

The zinc metallic anode encounters significant challenges stemming from vigorous and prolonged water-induced side reactions along with uncontrolled dendritic Zn growth, resulting in a notable decrease the Coulombic efficiency (CE) longevity of aqueous batteries (AZBs). To mitigate negative impacts water's reactivity, robust aluminum-centered metal–organic framework (MOF) is utilized. This MOF features water pocket embedded within its subnano channels, serving to safeguard anode. narrow channels captures molecules originating solvated Zn2+, facilitating gradual desolvation, thus eliminating corrosion reactions. Essentially, modified act as ion rectifiers, aiding swift even Zn2+ transfer, thereby averting dendrite creation on metal. Consequently, shielded metal exhibits unparalleled cycling stability, surpassing 2000 cycles, an exceptionally high average CE 99.47%. Moreover, MOF@Zn|KVOH (KV12O30-y·nH2O) cell demonstrates consistent performance, achieving 6000 cycles at 5 A g–1. groundbreaking approach for enhancing reversibility anodes could drive practical adoption AZBs.

Язык: Английский

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Synergistic effect of the PMIA nanofiber membrane with a dual-oriented network structure and Li_0.5Bi_0.5TiO₃ nanofibers for high-performance lithium metal batteries

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(39), С. 26513 - 26527

Опубликована: Янв. 1, 2024

Solid-state lithium metal batteries are favored for their superior energy density and safety compared to liquid batteries.

Язык: Английский

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Progress and perspectives on the development of inorganic nanofibres/nanowires for functional electrolytes of solid-state lithium metal batteries

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

The review provides detailed mechanism analysis and design strategies of ion transport, high-valtage stability anode protection inorganic nanofibers/nanowires for electrolytes, which will be widely used in solid-state lithium metal batteries.

Язык: Английский

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