Pristine MOF Materials for Separator Application in Lithium–Sulfur Battery

Advanced Science, Год журнала: 2024, Номер 11(31)

Опубликована: Июнь 18, 2024

Abstract Lithium–sulfur (Li–S) batteries have attracted significant attention in the realm of electronic energy storage and conversion owing to their remarkable theoretical density cost‐effectiveness. However, Li–S continue face challenges, primarily severe polysulfides shuttle effect sluggish sulfur redox kinetics, which are inherent obstacles practical application. Metal‐organic frameworks (MOFs), known for porous structure, high adsorption capacity, structural flexibility, easy synthesis, emerged as ideal materials separator modification. Efficient interception/conversion ability rapid lithium‐ion conduction enabled by MOFs modified layers demonstrated batteries. In this perspective, objective is present an overview recent advancements utilizing pristine MOF modification separators The mechanisms behind enhanced electrochemical performance resulting from each design strategy explained. viewpoints crucial challenges requiring resolution also concluded Moreover, some promising concepts based on proposed enhance investigate adsorption/conversion mechanisms. These efforts expected contribute future advancement advanced

Язык: Английский

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Regulating the P-band center of SnS2-SnO2 heterostructure to boost the redox kinetics for high-performance lithium-sulfur battery

Chemical Engineering Journal, Год журнала: 2024, Номер 490, С. 151526 - 151526

Опубликована: Апрель 22, 2024

Язык: Английский

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Crystal engineering strategies for advanced electrocatalysts in lithium-sulfur batteries

Materials Today, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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Optimizing Electron Modulation Induced by the Interfacial Coupling in Cu₃P‐Cu₂O Heterostructures to Enhance Polysulfide Conversion

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 11, 2025

Abstract Electrocatalysts can inhibit the shuttling of lithium polysulfides (LiPSs) in Li–S batteries by enabling catalytic conversion LiPSs. In this research, heterogeneous Cu 3 P‐Cu 2 O nanoparticles anchored on porous carbon network (Cu O/PC) are investigated to stimulate reaction kinetics LiPSs conversion. At heterojunction interface, high electron density measured functional theory energizes transfer, anchoring The strong interfacial coupling effect generated heterostructure endows active sites with promoted adsorption capability. improved sulfur reduction and Li S activation suppress shuttling. Remarkably, cells equipped O/PC@S cathode marked capacity 1254.3 mAh g −1 at 0.2C ultrahigh cycling stability (0.021% decay rate per cycle after 1200 cycles 4C). Considering practical applications, cathode‐based pouch cell exhibited an initial specific 1069.5 a energy 378.8 Wh kg . This work established pathway for regulating through copper‐based catalysts, exhorting design highly efficient catalysts batteries.

Язык: Английский

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MOF‐Derived MoC/WC Heterostructure as Bidirectional Catalyst for Lithium Polysulfide Enables High‐Performance Lithium‐Sulfur Batteries

Small, Год журнала: 2024, Номер unknown

Опубликована: Дек. 4, 2024

Abstract Since lithium‐sulfur (Li‐S) batteries have high energy density and environmental friendliness, they garnered a lot of attention as new type storage technology. However, the shuttle effect lithium polysulfides (LiPSs) low utilization sulfur (S) in Li‐S reduce cycle stability efficiency limit their practical application. Therefore, it is urgent to achieve simultaneous immobilization conversion LiPSs utilizing catalysts. Herein, metal–organic framework (MOF)‐derived MoC/WC@NC heterojunction synthesized bidirectional catalyst for high‐performance batteries. Experimental theoretical calculations indicate that expected improve catalytic activity reduction oxidation reactions LiPSs, thereby accelerating kinetics In conclusion, with incorporation novel between cathodes separators batteries, assembled demonstrate excellent rate performance, an initial discharge capacity 1752.1 mAh g −1 at 0.1 C, discharge‐specific 783.2 even 2 C. More significantly, coulombic stayed above 99% 589.1 after 1000 cycles 1 C decay only 0.062% each cycle.

Язык: Английский

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Direct Observation of Hybridization Between Co 3d and S 2p Electronic Orbits: Moderating Sulfur Covalency to Pre‐Activate Sulfur‐Redox in Lithium–Sulfur Batteries

Advanced Science, Год журнала: 2024, Номер unknown

Опубликована: Дек. 27, 2024

Abstract Lithium–sulfur batteries (LSBs) offer high energy density and environmental benefits hampered by the shuttle effect related to sluggish redox reactions of long‐chain lithium polysulfides (LiPSs). However, fashion modification d ‐band center in separators is still ineffective, wherein mechanism understanding always relies on theoretical calculations. This study visibly probed evolution Co 3 during charge discharge using advanced inverse photoemission spectroscopy/ultraviolet spectroscopy (IPES/UPS), which offers reliable evidence are consistent well with This, coupled situ Raman X‐ray diffraction (XRD) electrochemical data, co‐evidences a novel pre‐activating S LSBs: LiPSs desert/insert C‐N matrixes within series Co@NCNT‐based separators. The insight pre‐activation discovered that downshifts hybridized 2 p orbitals LiPSs, giving rise more pronounced covalency thus accelerating conversion S₈. Benefiting from these advantages, optimized LSB possesses minimal decay rate 0.0058% after 200 cycles at 10 C. provides new insights into mechanisms supports conventional models center's impact performance.

Язык: Английский

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Engineering Bi/V/Mo‐Based Multicomponent Heterostructure Electrocatalyst Toward Robust Lithium–Sulfur Batteries and Mechanistic Insights into the Self‐Reconstruction

Small, Год журнала: 2025, Номер unknown

Опубликована: Март 13, 2025

Abstract The sluggish reaction kinetics and formidable shuttle effect of soluble lithium polysulfides (LiPSs) are thorny problems for the future industrialization lithium–sulfur (Li–S) batteries. Therefore, exploring efficient electrocatalysts to capture LiPSs accelerate their conversion is highly desirable yet tremendously challenging. Herein, a high‐efficiency Bi/Bi 2 O 3 /VMoN@rGO electrocatalyst with multifunctional active sites multilevel heterointerfaces elaborately designed Li–S Noteworthy, can greatly modulate electron distribution, facilitate charge transfer, optimize chemical absorption, enhance intrinsic activity, while rGO contributes high electrical conductivity, sufficient sites, robust structural stability. Thanks synergy different components, batteries employing functional separators exhibit impressive electrochemical performance sulfur utilization even under loading. More importantly, it discovered that Bi experience an phase evolution generate S amorphous crystalline phases, thereby bringing in unexpected enhancement. Furthermore, experimental results theoretical calculations authenticate reduced Li decomposition energy barrier achieved after situ reconstruction. This work not only provides new mechanistic insights into developing but also sheds light on regulating catalytic activity via self‐reconstruction.

Язык: Английский

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Accelerating the Catalytic Conversion of Polysulfides in Lithium–Sulfur Batteries from Both the Cathode and the Separator Perspectives

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер 17(18), С. 26580 - 26593

Опубликована: Апрель 28, 2025

Lithium-sulfur (Li-S) batteries have a high theoretical energy density and are regarded to be an ideal choice for the next generation of electrochemical storage systems. However, their practical application is hindered by several bottlenecks, including insulating nature sulfur its discharge products (Li2S2/Li2S), shuttling behavior intermediate polysulfides, slow redox reactions. Herein, we propose highly efficient bimetallic selenide electrocatalyst featuring hollow porous core-shell spherical structure, which serves as both cathode host modified separator coated on commercially available polypropylene address above issues. The enhances conductivity, unique structure provides rapid ion transport channels, along with ample spatial confinement lithium polysulfides. Additionally, abundant reactive sites selenides exhibit intrinsic electrocatalytic activity, accelerating polysulfide conversion improving kinetics. Density functional theory calculations indicate that interact more strongly polysulfides present lower reaction barriers compared those sulfide counterparts. Consequently, these materials demonstrate superior rate performance cycling stability in Li-S batteries, achieving impressive lifespan 1400 cycles minimal decay 0.030% per cycle at 1.0 C. This work insights into enhancing transition metal compounds batteries.

Язык: Английский

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A Cobalt Sulfide-Based Amorphous/Crystalline Heterostructure with Enhanced Interface Charge Polarization for Efficient Hydrogenation of N-Heteroarenes

ACS Sustainable Chemistry & Engineering, Год журнала: 2025, Номер unknown

Опубликована: Май 22, 2025

Язык: Английский

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Design of Wide‐Temperature Lithium‐Sulfur Batteries

Batteries & Supercaps, Год журнала: 2024, Номер 7(5)

Опубликована: Фев. 29, 2024

Abstract In electrochemical energy storage (EES), lithium‐sulfur (Li−S) batteries have recently gained recognition for their exceptional theoretical specific capacity, making them stand out among a wide range of cutting‐edge technologies. While Li−S demonstrate long cycle life under regular conditions, expanding application scenarios is crucial future development. Specifically, ensuring stable battery operation in extreme temperature environments, such as below 0 °C and above 60 °C, becomes paramount. Thus, this review aims to summarize the recent progress ranges analyse processability critical materials within these at temperatures. Ultimately, presents insights potential prospects systems operating range, contributing advancing devices capable functioning across various

Язык: Английский

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