Development of Synergistically Efficient Ni–Co Pair Catalytic Sites for Enhanced Polysulfide Conversion in Lithium–Sulfur Batteries

Advanced Functional Materials, Год журнала: 2024, Номер 34(37)

Опубликована: Март 29, 2024

Abstract The performance of Lithium–sulfur (Li–S) batteries is constrained by the migration lithium polysulfide (LiPS), slow conversion LiPS, and significant reaction barrier encountered during precipitation/dissolution Li 2 S throughout discharge/charge cycle. In this contribution, study presents Ni–Co dual‐atom catalytic sites on hollow nitrogen‐doped carbon (NiCoNC). Theoretical calculations experimental data reveal that catalysts (DACs) accelerate kinetic LiPSs facilitate formation/decomposition discharging charging, which minimizes LiPS migration. Consequently, utilization S/NiCoNC cathodes manifests a substantial initial capacity 1348.5 mAh g −1 at 0.1 C, exceptional cycling stability with an average degradation rate 0.028% per cycle over 900 cycles 0.5 noteworthy capability 626 C. Electrodes higher sulfur loading 4.5 mg cm −2 low electrolyte/sulfur ratio 8 µL exhibit specific capacities up to 1236 as well retention 494.2 after 200 0.2 This effectively showcases potential DACs for cathodes, thereby enhancing overall Li–S batteries.

Язык: Английский

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Recent advances in battery characterization using in situ XAFS, SAXS, XRD, and their combining techniques: From single scale to multiscale structure detection

Exploration, Год журнала: 2023, Номер 4(1)

Опубликована: Ноя. 20, 2023

Abstract Revealing and clarifying the chemical reaction processes mechanisms inside batteries will bring a great help to controllable preparation performance modulation of batteries. Advanced characterization techniques based on synchrotron radiation (SR) have accelerated development various over past decade. In situ SR been widely used in study electrochemical reactions due their excellent characteristics. Herein, three most wide important battery research were systematically reviewed, namely X‐ray absorption fine structure (XAFS) spectroscopy, small‐angle scattering (SAXS), diffraction (XRD). Special attention is paid how these are understand mechanism improve practical characteristics Moreover, combining advance acquisition single scale information simultaneous multiscale structures, which new perspective Finally, challenges future opportunities for featured current development.

Язык: Английский

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Revealing the role of crystal structure to catalysis: Inverse spinel phase Co-Mn-based catalyst for Li-S batteries

Chemical Engineering Journal, Год журнала: 2024, Номер 487, С. 150490 - 150490

Опубликована: Март 16, 2024

Язык: Английский

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Separator Modified by Carbon-Encapsulated CoFe Alloy Nanoparticles Supported on Carbon Nanotubes for Advanced Lithium–Sulfur Batteries

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(2), С. 1786 - 1796

Опубликована: Янв. 5, 2024

The commercialization of lithium–sulfur (Li–S) batteries still confronts great challenges due to the sluggish redox kinetics sulfur and shuttle effect lithium polysulfides. Designing a highly active electrocatalyst is an effective strategy address problems caused by complex multistep reactions. Herein, hybrid composite composed nitrogen-doped carbon-wrapped bimetallic cobalt–iron alloy nanoparticles (NC@CoFe) derived from Prussian blue analogue multiwalled carbon nanotubes (CNTs), which used as functional coating on separator for Li–S batteries. cross-linked CNTs provide robust conductive network quick charge transfer sufficient active-site exposure, NC@CoFe demonstrate strong ability anchoring catalytic conversion specific discharge capacity cell with NC@CoFe/CNT-modified can reach 865.4 mA h/g at 3.18 mA/cm2 (0.5 C) 576.3 after 300 cycles Coulombic efficiency approximately 98.2%. cells 7.4 mg/cm2 loading display remarkable retention 77.8% 100 cycles. functionalized carbonaceous adsorption nanoparticle catalysis holds substantial promise advancing durable

Язык: Английский

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Advanced Polymers in Cathodes and Electrolytes for Lithium–Sulfur Batteries: Progress and Prospects

Small, Год журнала: 2024, Номер 20(19)

Опубликована: Янв. 28, 2024

Abstract Lithium–sulfur (Li–S) batteries, which store energy through reversible redox reactions with multiple electron transfers, are seen as one of the promising storage systems future due to their outstanding advantages. However, shuttle effect, volume expansion, low conductivity sulfur cathodes, and uncontrollable dendrite phenomenon lithium anodes have hindered further application Li–S batteries. In order solve problems clarify electrochemical reaction mechanism, various types materials, such metal compounds carbon used in Polymers, a class inexpensive, lightweight, electrochemically stable enable construction low‐cost, high‐specific capacity Moreover, polymers can be multifunctionalized by obtaining rich structures molecular design, allowing them applied not only but also binders solid‐state electrolytes optimize performance from perspectives. The most widely areas related polymer applications including cathodes electrolytes, selected for comprehensive overview, relevant mechanisms action different components discussed. Finally, prospects practical batteries presented terms advanced characterization mechanistic analysis.

Язык: Английский

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Physical Field Effects to Suppress Polysulfide Shuttling in Lithium–Sulfur Battery

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 14, 2024

Lithium-sulfur batteries (LSB) with high theoretical energy density are plagued by the infamous shuttle effect of lithium polysulfide (LPS) and sluggish sulfur reduction/evolution reaction. Extensive research is conducted on how to suppress effects, including physical structure confinement engineering, chemical adsorption strategy, design redox catalysts. Recently, rational mitigate effects enhance reaction kinetics based field has been widely studied, providing a more fundamental understanding interactions species. Herein, focused their methods mechanisms interaction summarized systematically LPS. Overall, working principle LSB system, origin effect, kinetic trouble in briefly described. Then, mechanism application materials concepts external field-assisted elaborated, electrostatic force, built-in electric field, spin state regulation, strain magnetic photoassisted other strategies pivotally elaborated discussed. Finally, potential directions enhancing performance weakening high-energy anticipated.

Язык: Английский

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Design of high-performance transition metal sulfide electrode materials and its application in supercapacitors

Journal of Power Sources, Год журнала: 2024, Номер 606, С. 234560 - 234560

Опубликована: Апрель 21, 2024

Язык: Английский

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Developing High‐Performance Anode‐Free Lithium Batteries: Challenges, Strategies, and Opportunities

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 21, 2025

Abstract Anode‐free lithium batteries have attracted a lot of attention due to several appealing attributes such as high energy density, low cost, and enhanced safety. However, these tend relatively short cycle life rapid capacity decay because the loss active from continuous side reactions. In this review, comprehensive summary anode‐free developed in both liquid solid‐state electrolyte systems, technical challenges that plague their practical applications, well corresponding optimization strategies are provided. Special is paid mechanistic understanding deposition, stripping, corrosion, dissolution behaviors. addition, advanced characterization tools highlighted better understand failure mechanisms batteries. Lastly, opportunities current battery design concluded multiple possibilities available for high‐performance future

Язык: Английский

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Sustainable Carbon‐Based Catalyst Materials Derived From Lignocellulosic Biomass for Energy Storage and Conversion: Atomic Modulation and Properties Improvement

Carbon Energy, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

ABSTRACT Carbon electrocatalyst materials based on lignocellulosic biomass with multi‐components, various dimensions, high carbon content, and hierarchical morphology structures have gained great popularity in electrocatalytic applications recently. Due to the catalytic deficiency of neutral atoms, usage single lignocellulosic‐based electrocatalysis involving energy storage conversion presents unsatisfactory applicability. However, atomic‐level modulation lignocellulose‐based can optimize electronic structures, charge separation, transfer processes, so forth, which results substantially enhanced performance carbon‐based catalysts. This paper reviews recent advances rational design as electrocatalysts from an perspective, such self/external heteroatom doping metal modification. Then, through systematic discussion principles reaction mechanisms catalysts, prepared catalysts rechargeable batteries are reviewed. Finally, challenges improving prospects diverse review contributes synthesis strategy via modulation, turn promotes lignocellulose valorization for conversion.

Язык: Английский

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N/P Codoped Carbon Nanofibers Coupled with Chrysanthemum-Like Cobalt Phosphide Hybrid for Stable Lithium–Sulfur Batteries

ACS Applied Nano Materials, Год журнала: 2023, Номер 6(23), С. 22344 - 22354

Опубликована: Ноя. 15, 2023

Lithium–sulfur batteries demonstrate enormous energy density and are promising forms of storage. Unfortunately, the slow redox kinetics polysulfide shuttle effect some factors that prevent its development. To address these issues, combination nitrogen/phosphorus codoped carbon nanofiber membrane with chrysanthemum-like cobalt phosphide hybrid (CoP@NP-CF) utilized Li2S6 catholyte for lithium–sulfur battery. The conductive NP-CF facilitates fast electronic/ionic transport chemisorption lithium polysulfides, while CoP has a strong affinity effectively anchoring them, facilitating conversion species, diminishing reaction barriers. cell CoP@NP-CF delivers first discharge capacity 1211.8 mAh g–1 maintains 928.5 after 300 cycles (0.2C) at sulfur loading 5.2 mg. In addition, initial can remain 8.6 even 10.5 mg duration 100 cycles. This research indicates potential application materials in (Li–S) batteries.

Язык: Английский

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