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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Advanced Cathodes for Practical Lithium–Sulfur Batteries

Accounts of Materials Research, Год журнала: 2025, Номер unknown

Опубликована: Янв. 7, 2025

ConspectusSulfur, being lightweight, cost-effective, and offering a remarkably high lithium-ion storage capacity, has positioned lithium–sulfur (Li–S) batteries as promising candidates for applications that demand energy density. These range from electric vehicles (EVs) to urban air mobility (UAM) systems. Despite this potential, Li–S still face significant performance challenges, limiting their practical application. Chief among these challenges are the limited lifespan low charge–discharge efficiency, predominantly caused by dissolution of lithium polysulfide intermediate products formed during battery cycling in ether-based electrolytes. Moreover, sulfur sulfide, which constitute active material cathode, intrinsically insulating, complicating efforts increase content cathode fabricate thick cathodes with conductivity. issues have long stood way achieving commercial viability. Overcoming obstacles requires multifaceted approach focuses on modifications at level materials such material, conductive agents, binders, additives. This Account delves into key presents comprehensive overview research strategies aimed enhancing particular focus cathode. First, addresses batteries, complex composition utilization suboptimal electrolyte-to-sulfur ratios, nonuniform conversion reactions. Strategies overcome barriers include design advanced architectures promote an improved Modifications components adjoining materials, incorporation additives, help mitigate insulating nature sulfur.Additionally, places emphasis innovative use pelletizing techniques fabrication, demonstrated notable improvements performance. One Account's highlights is discussion low-temperature operation critical area real-world application, especially aerospace cold-environment operations. There differences when transitioning lab-scale coin cells larger pouch cells, underscoring importance considering cell geometries impact scalability Finally, explores development all-solid-state could fundamentally address issue eliminating liquid electrolytes altogether. The inherent drawbacks loading, can be strategically addressed pave commercialization. In doing so, offer clear pathway beyond limitations conventional making them highly attractive option requiring gravimetric volumetric densities.

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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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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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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Cubic iron fluoride anchored on Ti3C2Tx MXene as superior anode for high-performance lithium-ion batteries

Journal of Power Sources, Год журнала: 2024, Номер 613, С. 234850 - 234850

Опубликована: Июнь 7, 2024

Язык: Английский

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