Recent Progress for Concurrent Realization of Shuttle‐Inhibition and Dendrite‐Free Lithium–Sulfur Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(32)

Published: March 24, 2023

Lithium-sulfur (Li-S) batteries have become one of the most promising new-generation energy storage systems owing to their ultrahigh density (2600 Wh kg-1 ), cost-effectiveness, and environmental friendliness. Nevertheless, practical applications are seriously impeded by shuttle effect soluble lithium polysulfides (LiPSs), uncontrolled dendrite growth metallic Li, which result in rapid capacity fading battery safety problems. A systematic comprehensive review cooperative combination tackling fundamental problems terms cathode anode synchronously is still lacking. Herein, for first time, strategies inhibiting behavior dendrite-free Li-S simultaneously summarized classified into three parts, including "two-in-one" S-cathode Li-anode host materials toward full cell, "two birds with stone" modified functional separators, tailoring electrolyte stabilizing sulfur electrodes. This also emphasizes chemistry mechanism catalyst principles improving electrochemical performance; advanced characterization technologies monitor real-time LiPS evolution discussed detail. The problems, perspectives, challenges respect issues as well application proposed.

Language: Английский

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Synergistic Effect of Bimetallic MOF Modified Separator for Long Cycle Life Lithium‐Sulfur Batteries

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(3)

Published: Nov. 21, 2023

Abstract Severe polysulfide dissolution and shuttling are the main challenges that plague long cycle life capacity retention of lithium‐sulfur (Li‐S) batteries. To address these challenges, efficient separators designed modified with a dual functional bimetallic metal‐organic framework (MOF). Flower‐shaped MOFs (i.e., Fe‐ZIF‐8) nanostructured pores synthesized at 35 °C in water by introducing dopant metal sites (Fe), which then coated on polypropylene (PP) separator to provide selective channels, thereby effectively inhibiting migration lithium polysulfides while allowing homogeneous transport Li‐ions. The active Fe‐ZIF‐8 enable electrocatalytic conversion, facilitating conversion polysulfides. Moreover, developed can prevent dendrite formation due uniform pore size hence even Li‐ion deposition. A coin cell using Fe‐ZIF‐8/PP S‐loaded carbon cathode displayed high 1000 cycles initial discharge 863 mAh g −1 0.5 C 746 rate 3 C. Promising specific has been documented under sulfur loading 5.0 mg cm −2 electrolyte ratio (E/S) 5 µL .

Language: Английский

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Dual‐Functional V₂C MXene Assembly in Facilitating Sulfur Evolution Kinetics and Li‐Ion Sieving toward Practical Lithium–Sulfur Batteries

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(26)

Published: March 19, 2023

Abstract Lithium–sulfur (Li–S) batteries are considered as one of the most promising candidates to achieve an energy density 500 Wh kg⁻ 1 . However, challenges shuttle effect, sluggish sulfur conversion kinetics, and lithium‐dendrite growth severely obstruct their practical implementation. Herein, multiscale V 2 C MXene (VC) with a spherical confinement structure is designed high‐efficiency bifunctional promotor for evolution lithium species in Li–S batteries. Combining synchrotron X‐ray 3D nano‐computed tomography (X‐ray nano‐CT), small‐angle neutron scattering (SANS), first‐principle calculations, it revealed that activity VC can be maximized by tuning scale, as‐attained functions conducted follows: (i) acts efficient polysulfide (LiPS) scavenger due large number active sites; (ii) exhibits significantly improved electrocatalytic function Li S nucleation decomposition reaction kinetics owing scale effect; (iii) regulate dynamic behavior Li‐ions thus stabilize plating/stripping effectively on account unique ion‐sieving effect.

Language: Английский

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High-Entropy MXene as Bifunctional Mediator toward Advanced Li–S Full Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(3), P. 2395 - 2408

Published: Jan. 9, 2024

The development of high-energy-density Li–S batteries (LSBs) is still hindered by the disturbing polysulfide shuttle effect. Herein, with clever combination between "high entropy" and MXene, an HE-MXene doped graphene composite containing multiple element quasi-atoms as bifunctional mediator for separator modification (HE-MXene/G@PP) in LSBs proposed. HE-MXene/G@PP offers high electrical conductivity fast lithium (LiPS) redox conversion kinetics, abundant metal active sites efficient chemisorption LiPSs, strong lipophilic characteristics uniform Li+ deposition on surface. As demonstrated DFT theoretical calculations, situ Raman, DRT results successively, efficiently captures LiPSs through synergistic modulation cocktail effect accelerates reaction, lattice distortion effectively induces homogeneous dendritic-free lithium. Therefore, this work achieves excellent long-term cycling performance a decay rate 0.026%/0.031% per cycle after 1200 cycles at 1 C/2 C. Li||Li symmetric cell maintains stable overpotential 6000 h under 40 mA cm–2/40 mAh cm–2. Furthermore, it delivers favorable stability 7.8 mg cm–2 low E/S ratio 5.6 μL mg–1. This strategy provides rational approach to resolve sulfur cathode anode problems simultaneously.

Language: Английский

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A Functional Janus Ag Nanowires/Bacterial Cellulose Separator for High‐Performance Dendrite‐Free Zinc Anode Under Harsh Conditions

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(47)

Published: Sept. 20, 2023

Aqueous zinc-ion batteries (AZIBs) offer promising prospects for large-scale energy storage due to their inherent abundance and safety features. However, the growth of zinc dendrites remains a primary obstacle practical industrialization AZIBs, especially under harsh conditions high current densities elevated temperatures. To address this issue, Janus separator with an exceptionally ultrathin thickness 29 µm is developed. This features bacterial cellulose (BC) layer on one side Ag nanowires/bacterial (AgNWs/BC) other side. High zincophilic property excellent electric/thermal conductivity AgNWs make them ideal serving as ion pump accelerate Zn2+ transport in electrolyte, resulting greatly improved conductivity, deposition homogeneous Zn nuclei, dendrite-free Zn. Consequently, Zn||Zn symmetrical cells exhibit stable cycle life over 1000 h 80 mA cm-2 are sustained 600 at 10 50 °C. Further, enables cycling stability aqueous capacitors (AZICs), scaled-up flexible soft-packaged batteries. study demonstrates potential functional separators promoting application batteries, particularly conditions.

Language: Английский

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Accelerated Li⁺ Desolvation for Diffusion Booster Enabling Low‐Temperature Sulfur Redox Kinetics via Electrocatalytic Carbon‐Grazfted‐CoP Porous Nanosheets

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(36)

Published: May 19, 2023

Abstract Lithium–sulfur (Li–S) batteries are famous for their high energy density and low cost, but prevented by sluggish redox kinetics of sulfur species due to depressive Li ion diffusion kinetics, especially under low‐temperature environment. Herein, a combined strategy electrocatalysis pore sieving effect is put forward dissociate the + solvation structure stimulate free diffusion, further improving reaction kinetics. As protocol, an electrocatalytic porous diffusion‐boosted nitrogen‐doped carbon‐grafted‐CoP nanosheet designed via forming NCoP active release more react with species, as fully investigated electrochemical tests, theoretical simulations in situ/ex situ characterizations. result, cells booster achieve desirable lifespan 800 cycles at 2 C excellent rate capability (775 mAh g −1 3 C). Impressively, condition mass loading or environment, cell 5.7 mg cm −2 stabilizes areal capacity 3.2 charming 647 obtained 0 °C after 80 cycles, demonstrating promising route providing ions toward practical high‐energy Li–S batteries.

Language: Английский

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Toward Low‐Temperature Zinc‐Ion Batteries: Strategy, Progress, and Prospect in Vanadium‐Based Cathodes

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 14(8)

Published: Dec. 28, 2023

Abstract Low‐temperature vanadium‐based zinc ion batteries (LT‐VZIBs) have attracted much attention in recent years due to their excellent theoretical specific capacities, low cost, and electrochemical structural stability. However, working temperature surrounding often results retarded transport not only the frozen aqueous electrolyte, but also at/across cathode/electrolyte interface inside cathode interior, significantly limiting performance of LT‐VZIBs for practical applications. In this review, a variety strategies solve these issues, mainly including interface/bulk structure engineering electrolyte optimizations, are categorially discussed systematically summarized from design principles in‐depth characterizations mechanisms. end, several issues about future research directions advancements characterization tools prospected, aiming facilitate scientific commercial development LT‐VZIBs.

Language: Английский

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Enabling fast diffusion/conversion kinetics by thiourea-induced wrinkled N, S co-doped functional MXene for lithium-sulfur battery

Energy storage materials, Journal Year: 2024, Volume and Issue: 67, P. 103328 - 103328

Published: March 1, 2024

Language: Английский

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Controllable Sulfurization of MXenes to In‐Plane Multi‐Heterostructures for Efficient Sulfur Redox Kinetics

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(9)

Published: Jan. 2, 2024

Abstract Although in‐plane heterostructure with high ion transport pathway and unique interfacial atomic structure offers endless possibilities in the catalysis field, it is still challenging to directly synthesize MXene‐based due differences crystal structures growth conditions. Here, Mo 2 C–MoS multi‐heterostructures are synthesized by topological conversion of sandwich‐like mesoporous C–SiO layers sulfur vapor subsequent removal SiO . During process, exposed C will efficiently converted 2H phase MoS , meanwhile, covered remained stable, affording metallic MXene semiconducting compatible one layer. The resultant layer has multiple heterointerfaces, build‐in electric fields as well abundant defects. Such structural features enable improve electrochemical active surface area (16.4 mF cm −2 ), which not only facilitates bidirectional electrochemistry between solid Li S soluble lithium polysulfides, but also enhances transfer kinetics electrons ions, giving rise a high‐rate performance (642 mAh g −1 at 5 C) long‐term cycle life (1000 cycles lithium–sulfur batteries.

Language: Английский

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Delocalized Isoelectronic Heterostructured FeCoO_xS_y Catalysts with Tunable Electron Density for Accelerated Sulfur Redox Kinetics in Li‐S batteries

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(47)

Published: Sept. 6, 2023

High interconversion energy barriers, depressive reaction kinetics of sulfur species, and sluggish Li+ transport inhibit the wide development high-energy-density lithium (Li-S) batteries. Herein, differing from random mixture selected catalysts, composite catalyst with outer delocalized isoelectronic heterostructure (DIHC) is proposed optimized, enhancing catalytic efficiency for decreasing related barriers. As a proof-of-content, FeCoOx Sy composites different degrees sulfurization are fabricated by regulating atoms ratio between O S. The relationship principal mechanism in DIHCs deeply understood electrochemical experiments to situ/operando spectral spectroscopies i.e., Raman, XRD UV/Vis. Consequently, polysulfide conversion Li2 S precipitation/dissolution strongly demonstrate volcano-like various DIHCs. Furthermore, -decorated cell delivers high performance (1413 mAh g-1 at 0.1 A ). Under low electrolyte/sulfur ratio, loading stabilizes areal capacity 6.67 cm-2 0.2 . Impressively, even resting about 17 days possible shuttling, high-mass-loading same capacity, showing practical application improving reaching performance.

Language: Английский

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