Recent Advances and Strategies toward Polysulfides Shuttle Inhibition for High‐Performance Li–S Batteries

Advanced Science, Journal Year: 2022, Volume and Issue: 9(12)

Published: March 1, 2022

Lithium-sulfur (Li-S) batteries are regarded as the most promising next-generation energy storage systems due to their high density and cost-effectiveness. However, practical applications seriously hindered by several inevitable drawbacks, especially shuttle effects of soluble lithium polysulfides (LiPSs) which lead rapid capacity decay short cycling lifespan. This review specifically concentrates on path LiPSs interaction with corresponding cell components along moving way, systematically retrospect recent advances strategies toward diffusion suppression. Overall, for effect inhibition can be classified into four parts, including capturing in sulfur cathode, reducing dissolution electrolytes, blocking channels functional separators, preventing chemical reaction between Li metal anode. Herein, fundamental aspect Li-S is introduced first give an in-deep understanding generation LiPSs. Then, discussed step step. Finally, general conclusions perspectives future research issues application proposed.

Language: Английский

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P‐Doped NiTe₂ with Te‐Vacancies in Lithium–Sulfur Batteries Prevents Shuttling and Promotes Polysulfide Conversion

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(11)

Published: Jan. 12, 2022

Lithium-sulfur (Li-S) batteries have been hindered by the shuttle effect and sluggish polysulfide conversion kinetics. Here, a P-doped nickel tellurium electrocatalyst with Te-vacancies (P⊂NiTe2-x ) anchored on maize-straw carbon (MSC) nanosheets, served as functional layer (MSC/P⊂NiTe2-x separator of high-performance Li-S batteries. The P⊂NiTe2-x enhanced intrinsic conductivity, strengthened chemical affinity for polysulfides, accelerated sulfur redox conversion. MSC nanosheets enabled NiTe2 nanoparticle dispersion Li+ diffusion. In situ Raman ex X-ray absorption spectra confirmed that MSC/P⊂NiTe2-x restrained -based cell has cyclability 637 mAh g-1 at 4 C over 1800 cycles degradation rate 0.0139% per cycle, high performance 726 6 C, areal capacity 8.47 cm-2 under configuration 10.2 mg , low electrolyte/sulfur usage ratio 3.9. This work demonstrates vacancy-induced doping heterogeneous atoms enables durable electrochemistry can impact future electrocatalytic designs related to various energy-storage applications.

Language: Английский

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Sulfur Reduction Reaction in Lithium–Sulfur Batteries: Mechanisms, Catalysts, and Characterization

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(44)

Published: Sept. 18, 2022

Abstract Lithium–sulfur batteries are one of the most promising alternatives for advanced battery systems due to merits extraordinary theoretical specific energy density, abundant resources, environmental friendliness, and high safety. However, sluggish sulfur reduction reaction (SRR) kinetics results in poor utilization, which seriously hampers electrochemical performance Li–S batteries. It is critical reveal underlying mechanisms accelerate SRR kinetics. Herein, issues reviewed. The conversion pathways initially introduced give an overview SRR. Subsequently, recent advances catalyst materials that can summarized detail, including carbon, metal compounds, metals, single atoms. Besides, various characterization approaches discussed, be divided into three categories: measurements, spectroscopic techniques, calculations. Finally, conclusion outlook part gives a summary proposes several key points future investigations on activities. This review provide cutting‐edge insights

Language: Английский

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Manipulating Electrocatalytic Li₂S Redox via Selective Dual‐Defect Engineering for Li–S Batteries

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(43)

Published: Aug. 31, 2021

Lithium-sulfur (Li-S) batteries are promising candidates for next-generation energy storage, yet they plagued by the notorious polysulfide shuttle effect and sluggish redox kinetics. While rationally designed mediators can facilitate conversion, favorable bidirectional sulfur electrocatalysis remains a formidable challenge. Herein, selective dual-defect engineering (i.e., introducing both N-doping Se-vacancies) of common MoSe2 electrocatalyst is used to manipulate Li2 S redox. Systematic theoretical prediction detailed electrokinetic analysis reveal electrocatalytic two types defects, thereby achieving deeper mechanistic understanding electrochemistry. The Li-S battery using this exhibits excellent cyclability, with low capacity decay rate 0.04% per cycle over 1000 cycles at 2.0 C. More impressively, potential practical applications highlighted high areal (7.3 mAh cm-2 ) construction flexible pouch cell. Such created an appealing approach toward working systems.

Language: Английский

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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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Phosphorus Vacancies as Effective Polysulfide Promoter for High‐Energy‐Density Lithium–Sulfur Batteries

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(12)

Published: Feb. 10, 2022

Abstract Lithium–sulfur batteries have aroused great interest in the context of rechargeable batteries, while shuttle effect and sluggish conversion kinetics severely handicap their development. Defect engineering, which can adjust electronic structures electrocatalyst, thus affect surface adsorption catalytic process, has been recognized as a good strategy to solve above problems. However, research on phosphorus vacancies rarely reported, how battery performance remains unclear. Herein, CoP with (CoP‐Vp) is fabricated study enhancement mechanism Li–S chemistry. The derived CoP‐Vp features low Co‐P coordination number introduced mainly exist form clusters. obtained reinforce affinity lithium polysulfides (LiPSs) be restrained. In addition, reduced reaction energy barriers promoted diffusion Li + accelerate redox kinetics. Electrochemical tests situ Raman results confirm advantages vacancies. S/CNT‐CoP‐Vp electrode presents outstanding cycling achieves high capacity 8.03 mAh cm −2 under lean electrolyte condition ( E /S = 5 μL mg −1 S ). This work provides new insight into improving through defect engineering.

Language: Английский

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S-doped carbon materials: Synthesis, properties and applications

Carbon, Journal Year: 2022, Volume and Issue: 195, P. 328 - 340

Published: March 18, 2022

Language: Английский

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Designing principles of advanced sulfur cathodes toward practical lithium‐sulfur batteries

SusMat, Journal Year: 2022, Volume and Issue: 2(1), P. 34 - 64

Published: Jan. 24, 2022

Abstract As one of the most promising candidates for next‐generation energy storage systems, lithium‐sulfur (Li‐S) batteries have gained wide attention owing to their ultrahigh theoretical density and low cost. Nevertheless, road commercial application is still full thorns due inherent sluggish redox kinetics severe polysulfides shuttle. Incorporating sulfur cathodes with adsorbents/catalysts has been proposed be an effective strategy address foregoing challenges, whereas complexity resulting from intricate design parameters greatly influences corresponding density, which frequently ignored. In this review, recent progress in strategies advanced summarized significance compatible regulation among active materials, tailored hosts, elaborate cathode configuration clarified, aiming bridge gap between fundamental research practical Li‐S batteries. The representative classified by encapsulation, host architecture, are first highlighted illustrate synergetic contribution electrochemical performance improvement. Feasible integration principles also guide cathodes. Finally, prospects future directions provided realize high long‐life

Language: Английский

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An encapsulating lithium-polysulfide electrolyte for practical lithium–sulfur batteries

Chem, Journal Year: 2022, Volume and Issue: 8(4), P. 1083 - 1098

Published: Jan. 21, 2022

Language: Английский

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Catalytic effect in Li-S batteries: From band theory to practical application

Materials Today, Journal Year: 2022, Volume and Issue: 57, P. 84 - 120

Published: June 9, 2022

Language: Английский

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