Crystalline-amorphous heterostructure on the phosphatized P-CoS2/CNT for augmenting the catalytic conversion kinetics of Li-S batteries

Chemical Engineering Journal, Год журнала: 2024, Номер 488, С. 150696 - 150696

Опубликована: Март 25, 2024

Язык: Английский

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Cathode Electrolyte Interphase Engineering for Prussian Blue Analogues in Lithium-Ion Batteries

Nano Letters, Год журнала: 2024, Номер 24(25), С. 7783 - 7791

Опубликована: Июнь 13, 2024

The increasing use of low-cost lithium iron phosphate cathodes in low-end electric vehicles has sparked interest Prussian blue analogues (PBAs) for lithium-ion batteries. A major challenge with hexacyanoferrate (FeHCFe), particularly systems, is its slow kinetics organic electrolytes and valence state inactivation aqueous ones. We have addressed these issues by developing a polymeric cathode electrolyte interphase (CEI) layer through ring-opening reaction ethylene carbonate triggered OH– radicals from structural water. This facile approach considerably mitigates the sluggish electrochemical typically observed electrolytes. As result, FeHCFe achieved specific capacity 125 mAh g–1 stable lifetime over 500 cycles, thanks to effective activation Fe low-spin states integrity CEI layers. These advancements shed light on potential PBAs be viable, durable, efficient materials commercial use.

Язык: Английский

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Covalent organic frameworks-based functional separators for rechargeable batteries: Design, mechanism, and applications

Energy storage materials, Год журнала: 2024, Номер 66, С. 103232 - 103232

Опубликована: Янв. 28, 2024

Язык: Английский

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A Multifunctional Secondary Based on Heterogeneous Co‐MnO@NC for Depth‐Induced Deposition and Conversion of Polysulfides in Li─S Batteries

Small, Год журнала: 2024, Номер 20(44)

Опубликована: Июль 6, 2024

The conductive carbon-based interlayer, as the secondary current collector in self-dissolving battery system, can effectively capture escaping cathode active materials, inducing deep release of remaining capacity. In multi-step reactions Li─S batteries, environmental tolerance interlayer to polysulfides determines inhibition shuttle effects. Here, a modified metal-organic framework (Mn-ZIF67) is utilized obtain nitrogen-doped carbon-coated heterogeneous Co-MnO (Co-MnO@NC) with dual catalytic center for functional materials. synergistic coupling mechanism NC and achieves rapid deposition conversion free polysulfide fragmented sulfur on collector, reducing capacity loss cathode. Co-MnO@NC/PP separator maintains an initial 1050 mAh g

Язык: Английский

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3D Printing of Tungstate Anion Modulated 1T‐MoS₂ Composite Cathodes for High‐Performance Lithium–Sulfur Batteries

Advanced Energy Materials, Год журнала: 2024, Номер 14(39)

Опубликована: Июль 10, 2024

Abstract Lithium–sulfur (Li–S) batteries can offer high capacity and energy‐density, but face challenges like low conductivity, lithium polysulfides (LiPSs) shuttling, limited reaction kinetics. In this study, the electronic configuration of Mo 4d orbital in MoS 2 is modulated through a one‐step method involving tungstate anion (WO 4 2− ) modulation to form stable 1T‐MoS /carbon composite (1T‐W‐MoS /C). When WO introduced, it causes transfer electrons 2H‐MoS , resulting generation 1T phase. composite, nanosheets exhibit remarkable hydrophilicity, catalytic activity, facilitating LiPSs adsorption Li + transport. Meanwhile, create abundant adsorption/catalytic sites with defects on basal surface edges efficient catalysis conversion. Furthermore, 3D‐printed electrodes without utilization binders current collectors ensure mass loading promote ion diffusion electrolyte penetration. Theoretical experimental results confirm that 1T‐W‐MoS /C catalyze conversion, suppress enhance sulfur Therefore, /C/S cathode exhibits initial excellent rate capability, achieving an areal 7.37 mAh cm −2 8.89 mg .

Язык: Английский

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A review of the use of metal oxide/carbon composite materials to inhibit the shuttle effect in lithium-sulfur batteries

New Carbon Materials, Год журнала: 2024, Номер 39(2), С. 201 - 220

Опубликована: Апрель 1, 2024

Язык: Английский

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Mott Schottky heterojunction Co/CoSe2 electrocatalyst: Achieved rapid conversion of polysulfides and Li2S deposition dissolution via built-in electric field interface effect

Chemical Engineering Journal, Год журнала: 2023, Номер 475, С. 146126 - 146126

Опубликована: Сен. 21, 2023

Язык: Английский

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High-Entropy Oxide Nanofibers as Catalytic Host Promising High Volumetric Capacity of Sulfur-Based Composites for Lithium–Sulfur Batteries

ACS Applied Energy Materials, Год журнала: 2023, Номер 6(16), С. 8377 - 8387

Опубликована: Авг. 9, 2023

The exploration of the appropriate sulfur host with favorable catalytic activity and high density is important to enhance volumetric energy lithium–sulfur (Li–S) batteries. In this work, high-entropy oxide (HEO) (Ni0.2Co0.2Mn0.2Cu0.2Zn0.2)WO4 (HE-CWO) nanofibers fabricated as for first time. multiple metal cations in single-phase structure HE-CWO enable strong chemical interaction soluble lithium polysulfides fast conversion kinetics from final discharge product Li2S2/Li2S. Therefore, S/HE-CWO composite exhibits a good rate capacity 656.3 mA h g–1 at 5C desirable cycling stability slow fading 0.080% per cycle 500 cycles 1C rate. Moreover, tap reaches 1.98 g cm–3, nearly twice that S/CNT (0.96 cm–3), leading 1795.3 cm–3–composite. This work affords promising strategy improving electrochemical performance Li–S batteries..

Язык: Английский

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Field‐assisted electrocatalysts spark sulfur redox kinetics: From fundamentals to applications

Interdisciplinary materials, Год журнала: 2023, Номер 2(3), С. 390 - 415

Опубликована: Май 1, 2023

Abstract The chief culprit impeding the commercialization of lithium–sulfur (Li–S) batteries is parasitic shuttle effect and restricted redox kinetics lithium polysulfides (LiPSs). To circumvent these key stumbling blocks, incorporating electrocatalysts with rational electronic structure modulation into sulfur cathode plays a decisive role in vitalizing higher electrocatalytic activity to promote utilization efficiency. Breaking stereotype contemporary electrocatalyst design kept on pretreatment, field‐assisted offer strategic advantages dynamically controllable electrochemical reactions that might be thorny regulate conventional processes. However, highly interdisciplinary electrochemistry puzzles researchers for fundamental understanding ambiguous correlations among structure, surface adsorption properties, catalytic performance. In this review, mechanisms, functionality explorations, including electric, magnetic, light, thermal, strain fields Li–S have been summarized. By demonstrating pioneering work customized geometric configuration, energy band engineering, optimal microenvironment arrangement response decreased activation enriched reactant concentration accelerated kinetics, cutting‐edge insights holistic periscope charge‐spin‐orbital‐lattice interplay between LiPSs are scrutinized, which aspires advance comprehensive complex batteries. Finally, future perspectives provided inspire innovations capable defeating existing restrictions.

Язык: Английский

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Selective Reduction of Multivariate Metal–Organic Frameworks for Advanced Electrocatalytic Cathodes in High Areal Capacity and Long-Life Lithium–Sulfur Batteries

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(2), С. 2283 - 2295

Опубликована: Янв. 2, 2024

Lithium–sulfur batteries hold great promise as next-generation high-energy-density batteries. However, their performance has been limited by the low cycling stability and sulfur utilization. Herein, we demonstrate that a selective reduction of multivariate metal–organic framework, MTV-MOF-74 (Co, Ni, Fe), transforms framework into porous carbon decorated with bimetallic CoNi alloy Fe3O4 nanoparticles capable entrapping soluble lithium polysulfides while synergistically facilitating rapid conversion Li2S. Electrochemical studies on coin cells containing 89 wt % loading revealed reversible capacity 1439.8 mA h g–1 at 0.05 C prolonged for 1000 cycles 1 C/1060.2 decay rate 0.018% per cycle. At high areal 6.9 mg cm–2 lean electrolyte/sulfur ratio (4.5 μL:1.0 mg), battery based 89S@CoNiFe3O4/PC cathode provides 6.7 cm–2. The exhibits an outstanding power density 849 W kg–1 5 delivers specific energy 216 2 C, corresponding to 433 kg–1. Density functional theory shows observed results are due strong interaction between Fe3O4, facilitated charge transfer substrate.

Язык: Английский

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