Electronic structure regulation in the design of low-cost efficient electrocatalysts: From theory to applications

Nano Energy, Год журнала: 2023, Номер 115, С. 108718 - 108718

Опубликована: Июль 17, 2023

Electrocatalysts play a pivotal role in reducing the reaction barriers for key reactions such as oxygen reduction (ORR), evolution (OER), and hydrogen (HER), which are essential development of environment-friendly energy conversion devices including metal air batteries (MABs), proton exchange membrane fuel cells (PEMFCs), oxyhydrogen (OFC), water electrolyzers (WE). Despite acknowledged effectiveness noble metals (Pt, Ir, Ru-based) electrocatalysts, their high cost scarcity greatly limit large-scale application. Thus, there is an urgent need to design low precious loading/noble metal-free electrocatalysts. The electronic structure plays crucial determining efficiency electron transfer during electrochemical reactions. Modifying can facilitate charge processes or create efficient active sites with barriers, both beneficial designing electrocatalysts catalytic activity. In this article, we review strategies modifying materials without introducing other phases (known self-modification) multi-phase modification). Specifically, self-modification heteroatom doping, edge/vacancy engineering, functional group introducing, tuning exposed crystal planes, modification regarding heterostructure creation analyzed detail. These useful that reinforce process Additionally, two approaches accelerating on electrode bind-free/integrated constructing assembly, have also been discussed pushing forward practical At last, provide comprehensive summary future perspectives self-modification/multi-phase application these low-cost article.

Язык: Английский

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A Review on Engineering Design for Enhancing Interfacial Contact in Solid-State Lithium–Sulfur Batteries

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Янв. 4, 2024

Abstract The utilization of solid-state electrolytes (SSEs) presents a promising solution to the issues safety concern and shuttle effect in Li–S batteries, which has garnered significant interest recently. However, high interfacial impedances existing between SSEs electrodes (both lithium anodes sulfur cathodes) hinder charge transfer intensify uneven deposition lithium, ultimately result insufficient capacity poor cycling stability. Hence, reduction resistance is paramount importance pursuit efficacious batteries. In this review, we focus on experimental strategies employed enhance contact electrodes, summarize recent progresses their applications Moreover, challenges perspectives rational design practical batteries are outlined as well. We expect that review will provide new insights into further technique development

Язык: Английский

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Relay-Type Catalysis by a Dual-Metal Single-Atom System in a Waste Biomass Derivative Host for High-Rate and Durable Li–S Batteries

ACS Nano, Год журнала: 2024, Номер 18(21), С. 13468 - 13483

Опубликована: Май 13, 2024

An environmental-friendly and sustainable carbon-based host is one of the most competitive strategies for achieving high loading practicality Li–S batteries. However, polysulfide conversion reaction kinetics still limited by nonuniform or monofunctional catalyst configuration in carbon host. In this work, we propose a catalysis mode based on "relay-type" co-operation adjacent dual-metal single atoms high-rate durable A discarded sericin fabric-derived porous N-doped with stacked schistose structure prepared as high-loading sulfur (84 wt %) facile ionothermal method, which further enables uniform anchoring Fe/Co atoms. This multifunctional superior lithiophilic–sulfiphilic electrocatalytic capabilities contributed single-atom modulation effects different stages liquid polysulfides solid Li2S2/Li2S, leading to suppression "shuttle effect", alleviation nucleation decomposition barriers Li2Sx, acceleration kinetics. The corresponding batteries exhibit specific capacity 1399.0 mA h g–1, performance up 10 C, excellent cycling stability over 1000 cycles. They can also endure 8.5 mg cm–2 lean electrolyte condition yield an areal 8.6 cm–2. work evidentially demonstrates potential waste biomass reutilization coupled design system practical energy density.

Язык: Английский

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Three Birds with One Stone: Multifunctional TiN‐MXene‐Co@CNTs Network as Sulfur/Lithium Host for High‐Areal‐Capacity Lithium‐Sulfur Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(35)

Опубликована: Июнь 13, 2024

Abstract The inevitable shuttling and slow redox kinetics of lithium polysulfides (LiPSs) as well the uncontrolled growth Li dendrites have strongly limited practical applications lithium‐sulfur batteries (LSBs). To address these issues, we innovatively constructed carbon nanotubes (CNTs) encapsulated Co nanoparticles in situ grown on TiN‐MXene nanosheets, denoted TiN‐MXene‐Co@CNTs, which could serve simultaneously both sulfur/Li host to kill “three birds with one stone” (1) efficiently capture soluble LiPSs expedite their conversion, (2) accelerate nucleation/decomposition solid 2 S, (3) induce homogeneous deposition. Benefiting from synergistic effects, TiN‐MXene‐Co@CNTs/S cathode a sulfur loading 2.5 mg cm −2 show high reversible specific capacity 1129.1 mAh g −1 after 100 cycles at 0.1 C, ultralong cycle life over 1000 1.0 C. More importantly, it even achieves areal 6.3 50 under 8.9 low E/S ratio 5.0 μL . Besides, TiN‐MXene‐Co@CNTs deliver stable plating/striping behavior h.

Язык: Английский

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Exploring advances in sulfur composite cathodes for lithium-sulfur batteries: A comprehensive review

Journal of Energy Storage, Год журнала: 2024, Номер 94, С. 112347 - 112347

Опубликована: Июнь 13, 2024

Язык: Английский

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Seeding Co Atoms on Size Effect‐Enabled V₂C MXene for Kinetically Boosted Lithium–Sulfur Batteries

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 9, 2024

Abstract Lithium‐sulfur (Li–S) batteries are facing a multitude of challenges, mainly pertaining to the sluggish sulfur redox kinetics and rampant lithium dendrite growth on cathode anode side, respectively. In this sense, MXene has shown conspicuous advantages in serving as dual‐functional promotor for Li–S throughout morphologic engineering, but still suffers from poor electrocatalytic activity insufficient lithophilic sites. Herein, atomically dispersed Co sites seeded onto size effect‐enabled V 2 C spheres (Co‐VC), leading generation unique coordination configurations rich active Electrochemical tests combined with synchrotron radiation X‐ray 3D nano‐computed tomography theoretical calculations unravel that Co‐VC optimal environments simultaneously boost reaction nucleation. As consequence, modified separator can sustain stable operation over 700 cycles negligible capacity decay at 1.0 C, delivers an areal 9.0 mAh cm −2 desired cyclic performance high loading 7.6 mg lean electrolyte dosage 4.0 µL S −1 0.1 C. The work opens new avenue boosting atomic‐scale site design aid 2D substrates toward pragmatic batteries.

Язык: Английский

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Cyclodextrin Metal–Organic Framework Functionalized Carbon Materials with Optimized Interface Electronics and Selective Supramolecular Channels for High‐Performance Lithium–Sulfur Batteries

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 6, 2024

During the reaction process in lithium-sulfur batteries, Lewis acidic lithium polysulfides (LiPSs) affect ion distribution and overall electrolyte stability, degrading battery performance product (e.g., Li

Язык: Английский

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Propelling polysulfides conversion in lithium-sulfur batteries via separator modification with nitrogen-doped porous carbon nanosheets decorated by iron carbide nanoparticles

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160588 - 160588

Опубликована: Фев. 1, 2025

Язык: Английский

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In situ self-assembled CoS-Co9S8-NC homologous heterostructure on 3D interconnected carbon networks as a multifunctional separator for the high-rate and long-life Li-S batteries

Chemical Engineering Journal, Год журнала: 2024, Номер 498, С. 155541 - 155541

Опубликована: Сен. 6, 2024

Язык: Английский

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Embedding covalent sulfur composite inside mesoporous carbon doped with Ni-N sites for high-performance lithium-sulfur batteries

Journal of Energy Storage, Год журнала: 2024, Номер 91, С. 112027 - 112027

Опубликована: Май 18, 2024

Язык: Английский

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