In Situ Reconstruction of Electrocatalysts for Lithium–Sulfur Batteries: Progress and Prospects

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(33)

Published: May 1, 2023

Abstract The current research of Li–S batteries primarily focuses on increasing the catalytic activity electrocatalysts to inhibit polysulfide shuttling and enhance redox kinetics. However, stability is largely neglected, given premise that they are stable over extended cycles. Notably, reconstruction during electrochemical reaction process has recently been proposed. Such in situ inevitably leads varied electrocatalytic behaviors, such as sites, selectivity, activity, amounts sites. Therefore, a crucial prerequisite for design highly effective an in‐depth understanding variation active sites influence factors which not achieved fundamental summary. This review comprehensively summarizes recent advances behaviors different process, mainly including metal nitrides, oxides, selenides, fluorides, metals/alloys, sulfides. Moreover, unexplored issues major challenges chemistry summarized prospected. Based this review, new perspectives offered into true batteries.

Language: Английский

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Li–S Chemistry of Manganese Phosphides Nanoparticles With Optimized Phase

Advanced Science, Journal Year: 2023, Volume and Issue: 10(9)

Published: Feb. 3, 2023

The targeted synthesis of manganese phosphides with target phase remains a huge challenge because their various stoichiometries and phase-dependent physicochemical properties. In this study, phosphorus-rich MnP, manganese-rich Mn2 P, heterostructure MnP-Mn2 P nanoparticles evenly dispersed on porous carbon are accurately synthesized by convenient one-pot heat treatment phosphate resin combined Mn2+ . Moreover, electrochemical properties systematically investigated as sulfur hosts in lithium-sulfur batteries. Density functional theory calculations demonstrate the superior adsorption, catalysis capabilities, electrical conductivity P/C, compared MnP/C P/C. P/C@S exhibits an excellent capacity 763.3 mAh g-1 at 5 C decay rate only 0.013% after 2000 cycles. A evolution product (MnS) is detected during P/C polysulfides redox through situ X-ray diffraction Raman spectroscopy. At loading up to 8 mg cm-2 , achieves area 6.4 0.2 C. pouch cell cathode initial energy density 360 Wh kg-1

Language: Английский

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Composition-optimized manganese phosphide nanoparticles anchored on porous carbon network for efficiently electrocatalytic hydrogen evolution

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 469, P. 143879 - 143879

Published: June 2, 2023

Language: Английский

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Hollow Ti3C2T MXene@CoSe2/N-doped carbon heterostructured composites for multiphase electrocatalysis process in lithium-sulfur batteries

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 474, P. 145970 - 145970

Published: Sept. 9, 2023

Language: Английский

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Vanadium-based compounds and heterostructures as functional sulfur catalysts for lithium-sulfur battery cathodes

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 86, P. 118 - 134

Published: July 16, 2023

Language: Английский

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Regulating the interfacial electric field of NbP–NbC heterostructures to efficiently inhibit polysulfide shuttling in Li–S batteries

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(9), P. 5307 - 5318

Published: Jan. 1, 2024

A novel NbP–NbC heterostructure with interfacial electric field provides moderate polysulfide absorbability and further enhances the intrinsic catalytic activity for Li–S batteries.

Language: Английский

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Multi-heterostructured MXene/NiS₂/Co₃S₄ with S-Vacancies to Promote Polysulfide Conversion in Lithium–Sulfur Batteries

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(19), P. 24502 - 24513

Published: May 6, 2024

The severe shuttle effect of polysulfides (LiPSs) and the slow liquid–solid phase conversion are main obstacles hindering practical application lithium–sulfur (Li–S) batteries. Separator modification with a high-activity catalyst can boost LiPSs suppress their effect. In this work, multi-heterostructured MXene/NiS2/Co3S4 rich S-vacancies was constructed facilely hydrothermal high-temperature annealing strategy for separator modification. MXene sheet not only provides physical barrier but also ensures high conductivity adsorption capacity catalyst; dual active centers NiS2 Co3S4 catalyze conversion. addition, vacancies heterostructures modulate electronic structure catalyst, improve its intrinsic activity, reduce reaction barrier, thus facilitating ion/electron transport inhibiting Benefiting from these advantages, Li–S battery modified exhibits exciting discharge capacities (1495.4 mAh g–1 at 0.1C 549.0 6C) an excellent ultra-long cycle life (average decay rate 0.026% 2000 cycles 2C); sulfur loading 10.0 mg cm–2, operates nearly 80 0.2C, giving retention 75.76%. This work

Language: Английский

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Mastering Surface Sulfidation of MnP‐MnO₂ Heterostructure to Facilitate Efficient Polysulfide Conversion in Li─S Batteries

Advanced Science, Journal Year: 2024, Volume and Issue: 11(32)

Published: June 24, 2024

Abstract The development of lithium–sulfur (Li─S) batteries has been hampered by the shuttling effect lithium polysulfides (LiPSs). An effective method to address this issue is use an electrocatalyst accelerate catalytic conversion LiPSs. In study, heterogeneous MnP‐MnO 2 nanoparticles are uniformly synthesized and embedded in porous carbon (MnP‐MnO /C) as core catalysts improve reaction kinetics situ characterization density functional theory (DFT) calculations confirm that heterostructure undergo surface sulfidation during charge/discharge process, forming MnS phase. Surface catalyst significantly accelerated SRR Li S activation, effectively inhibiting LiPSs effect. Consequently, /C@S cathode achieves outstanding rate performance (10 C, 500 mAh g −1 ) ultrahigh cycling stability (0.017% decay per cycle for 2000 cycles at 5 C). A pouch cell with delivers a high energy 429 Wh kg . This study may provide new approach investigating electrocatalysts, which valuable advancing high‐energy‐density Li−S batteries.

Language: 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, Journal Year: 2024, Volume and Issue: 490, P. 151526 - 151526

Published: April 22, 2024

Language: Английский

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Oxygen-incorporated crystalline/amorphous heterophase cobalt vanadium selenide nanoplates with dense interfacial sites for robust lithium–sulfur batteries

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(6), P. 3711 - 3721

Published: Jan. 1, 2024

Oxygen-incorporated heterophase cobalt vanadium selenide nanoplates with dense crystalline/amorphous interfacial sites (DC/A O-CoVSe NPs) are developed as high-efficiency sulfur electrocatalysts for lithium–sulfur batteries.

Language: Английский

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