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

Small, Journal Year: 2024, Volume and Issue: 20(44)

Published: July 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

Language: Английский

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Unlocking Performance: The Transformative Influence of Single Atom Catalysts on Advanced Lithium‐Sulfur Battery Design

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(38)

Published: July 18, 2024

Abstract Theoretically, lithium–sulfur (Li‐S) batteries are highly promising candidates for renewable energy applications, given their scalable density and low cost. However, current practical performance is limited below theoretical expectations, despite attempts to accommodate volumetric expansion improve electrical conductivity with porous S‐anchoring supports. Battery primarily rate‐limited by the sluggish redox conversion reaction kinetics of lithium polysulfides (LiPS), which respectively transform into sulfide (Li 2 S) elemental S through charging discharging galvanostatic cycles. Given strong electrocatalytic other pertinent benefits, recent research highlights single‐atom catalysts (SACs) as enhancing Li‐S batteries. Thus, this review summarizes contemporary advancements regarding SAC implementation in batteries, emphasizing catalyst morphology, battery performance, mechanistic elucidation. More specifically, separators cathodes can be engineered via SACs better anchor LiPS reductive kinetics, thereby inhibiting “shuttle effect” known impact In addition, modulated functional groups synergistically enabling higher loadings redistributing transferred charge. Overall, conspicuously boost justifying further toward

Language: Английский

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Functional Separators for Modulating Li‐Ion Flux Toward Uniform Li Deposition: A Review

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(38)

Published: July 27, 2024

Abstract Homogeneous Li‐ion flux is a significant precondition of uniform deposition in Li metal batteries (LMBs). Numerous methodologies have been presented for homogenizing before based on the features deposition. Separators that provide transfer channels and are directly exposed to anodes attracted rising attention their role guiding regular distribution. More novel functional separators proposed aiming achieve dendrite‐free Herein, factors strategies regulate distribution through toward LMBs concentrated on. The current mechanisms regulation by first highlighted, including physical properties, interactions with electrolyte, modification solid‐state electrolyte interphase. According these mechanisms, separator regulating divided into three methodologies, typical examples introduced. Finally, limitations suggestions future studies presented, inspire engaged researchers newcomers trigger more exciting works this area.

Language: Английский

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Rational Design of Janus Metal Atomic‐Site Catalysts for Efficient Polysulfide Conversion and Alkali Metal Deposition: Advances and Prospects

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(25)

Published: Feb. 1, 2024

Abstract Although metal–sulfur batteries (M–S batteries, M = Li, Na, K) are promising next‐generation energy‐storage devices because of ultrahigh theoretical energy density, low cost, and environmentally friendliness, their practical applications significantly hindered by the shuttle effect polysulfides growth alkali metal dendrites. These issues can be mitigated using Janus atomic‐site catalysts, which possess maximum atom utilization efficiency (≈100%), adjustable electronic structures, tailorable catalytic sites, thereby effectively improving electrochemical performance M–S batteries. In this review, recent progress development atomic‐sites on properties, synthesis, characterizations reviewed. Then, advances in catalysts intended for accelerating polysulfide conversion regulating deposition, briefly introducing working principles systematically summarized. Furthermore, a high emphasis is placed effective regulation strategies rational design Finally, current challenges future research directions also presented to develop high‐efficiency high‐energy

Language: Английский

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New flexible separators for modification of high-performance lithium–sulfur batteries

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1005, P. 176146 - 176146

Published: Aug. 24, 2024

Language: Английский

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