Oxygen defect of metal oxides plays a dominant role in the immobilization of sulfur for Li-S batteries [41, 42]. However, based on rich defect engineering research results, new defect generation strategies are rarely reported.
Request PDF | Proton‐Induced Defect‐Rich Vanadium Oxides as Reversible Polysulfide Conversion Sites for High‐Performance Lithium Sulfur Batteries | Lithium‐sulfur (Li‐S) battery has ...
Among the various secondary batteries, potassium-ion batteries (PIBs) have attracted widespread attention from the scientific community due to their unique advantages [3]. The abundance of potassium resources in the earth''s crust far exceeds that of lithium, giving PIBs a significant edge in terms of cost and resource sustainability [4].
The high-energy-density and low-cost features endow lithium-sulfur batteries with broad application prospects. However, many drawbacks, especially the detrimental shuttle effect, have hindered the further development of LSBs. In response, a lot of new structures have been applied to suppress the shuttle effect and promote the development of LSBs. Recently, …
To clarify the effect of defects configuration on the performance of lithium-sulfur batteries with Li 2 S@graphene cathode, we first constructed the graphene models with structural defects and carbon atom vacancy defects. Graphene is known to have different defect types, including stone wales defect (SW), vacancy defects, adatoms defects, and ...
The defect engineering together with separator modification strategies enable efficient and durable Li-S batteries. Graphical abstract. Download: Download high-res image ... Lithium-sulfur batteries (LSBs) are considered as one of the most promising next-generation energy storage systems. To mitigate the shuttle effect of lithium polysulfides ...
Although some experiments have shown that point defects in a cathode host material may enhance its performance for lithium-sulfur battery (LSB), the enhancement mechanism needs to be well investigated for the design of desired sulfur host. Herein, the first principle density functional theory (DFT) is adopted to investigate a high-performance sulfur …
Although lithium-sulfur (Li-S) batteries have a high theoretical energy density, their practical applications are limited by rapid capacity fading and poor cycling stability due to the dissolution of high-order polysulfides in electrolytes and the sluggish kinetics of the solid-state Li2S2/Li2S redox reaction. Herein, a polysulfide sorbent and redox reaction catalytic promoter, …
To clarify the effect of defects configuration on the performance of lithium-sulfur batteries with Li 2 S@graphene cathode, we first constructed the graphene models with …
The fundamental kinetics of the electrocatalytic sulfur reduction reaction (SRR), a complex 16-electron conversion process in lithium–sulfur batteries, is so far insufficiently explored. Here ...
Defects are generally considered to be effective and flexible in the catalytic reactions of lithium–sulfur batteries. However, the influence of the defect concentration on catalysis remains ambiguous. In this work, …
High-energy–density lithium-sulfur batteries have been rated as a promising, yet challenging, next-generation battery technology. Typically, the serious shuttle of polysulfide …
Although lithium-sulfur batteries (LSBs) exhibit high theoretical energy density, their practical application is hindered by poor conductivity of the sulfur cathode, the shuttle effect, and the irreversible deposition of Li 2 S. To address these issues, a novel composite, using electrospinning technology, consisting of Fe 3 Se 4 and porous nitrogen-doped carbon …
Defective two-dimensional transition metal dichalcogenides can be effective electrocatalysts for Li–S batteries, but the relationship between defect types and battery performance is unclear. In this work, we designed S vacancy-type SV-VS2 and V self-intercalated-type VI-VS2 and measured their catalytic activities in Li–S batteries. Compared …
The slow redox kinetics of lithium-sulfur batteries severely limit their application, and sulfur utilization can be effectively enhanced by designing different cathode sulfur host materials. ... Hollow Defect-Rich Nanofibers as Sulfur Hosts for Lithium-Sulfur Batteries ACS Appl Mater Interfaces. 2024 Jun 26. doi: 10.1021/acsami.4c05675. Online ...
Lithium–sulfur (Li//S) batteries constitute promising high energy storage devices but suffer from serious Li polysulfide (LiPS) shuttle effect and sluggish redox conversion. Herein, we report that these challenges can be tackled successfully by introducing oxygen defects in W18O49via Cu doping. The oxygen de
1. Introduction. Lithium-sulfur battery (LSB) has been considered as a candidate for next-generation rechargeable battery beyond Li-ion batteries due to the high theoretical energy density of 2600 Wh kg −1, low cost, environmental benignity and natural abundance of sulfur [1].However, the realization of LSB with the practical energy density of …
This paper systematically reviews the action mechanism of defect engineering in the electrocatalytic process and the latest progress in energy storage developments. The …
The sluggish sulfur redox kinetics and shuttle effect of lithium polysulfides (LiPSs) are recognized as the main obstacles to the practical applications of the lithium-sulfur (Li-S) batteries. Accelerated conversion by catalysis can mitigate these issues, leading to enhanced Li-S performance. Howeve …
Due to the adsorption-catalysis synergistic effect between MXene and Au QDs, an initial discharge capacity of 1,500 mA h g-1 is obtained, corresponding to a sulfur utilization …
The sluggish sulfur redox kinetics and shuttle effect of lithium polysulfides (LiPSs) are recognized as the main obstacles to the practical applications of the lithium-sulfur (Li-S) batteries. Accelerated conversion by catalysis can mitigate these issues, leading to enhanced Li-S performance. However, a catalyst with single active site cannot simultaneously accelerate …
The decay of lithium–sulfur (Li–S) batteries is mainly due to the shuttle effect caused by intermediate polysulfides (LiPSs). Herein, a multiple confined cathode architecture is prepared by filling graphitized Pinus sylvestris …
The high theoretical discharge capacity (1675 mA h g –1) and exceptional gravimetric energy density (2600 Wh kg –1) have positioned lithium‒sulfur (Li–S) batteries as a promising alternative to commercially available lithium-ion batteries [1,2,3,4,5].However, the complex solid–liquid–solid phase separations involving sulfur (S), intermediate lithium …
3 · Sodium–sulfur (Na–S) batteries are considered as a promising successor to the next-generation of high-capacity, low-cost and environmentally friendly sulfur-based battery systems. However, Na–S batteries still suffer …
The two-dimensional structure exposes the sulfur defects on the catalyst surface well. ... lithium-sulfur batteries face a decline in the mass transfer capacity of the electrolyte, increasing the difficulty of ion solvation and dissociation from solvation, making the catalyst unable to capture lithium ions at low temperatures, and thus losing ...
Lithium–sulfur (Li–S) batteries have long been expected to be a promising high-energy-density secondary battery system since their first prototype in the 1960s. During the past decade, great progress has been achieved in promoting the performances of Li–S batteries by addressing the challenges at the laboratory-level model systems. With growing attention …
Room-temperature sodium-sulfur batteries are promising grid-scale energy storage systems owing to their high energy density and low cost. However, their application is limited by the dissolution of long-chain sodium polysulfides and slow redox kinetics. To address these issues, a cobalt single-atom catalyst with N/O dual coordination was derived from a …
Request PDF | Defects on Li2S@Graphene Cathode Improves the Performance of Lithium-Sulfur Battery, A Theoretical Study | Lithium-sulfur (Li−S) batteries are promising next generation large-scale ...
Lithium–sulfur batteries are one of the most promising alternatives for advanced battery systems due to the merits of extraordinary theoretical specific energy density, abundant resources, environmental friendliness, and high safety. ... excessive defects led to the decreased catalytic activities because of the transformation of defect site ...
INTRODUCTION. Metal-sulfur batteries with high energy densities have received much attention in recent years. The lithium-sulfur (Li-S) battery is a typical example featuring a high capacity caused by the conversion between sulfur and lithium sulfide (Li 2 S) in the cathode [].However, this conversion also results in rapid sulfur loss and poor cycling …
Reduced Graphitic Carbon Nitride as the Sulfur Host for LithiumMaterial -Sulfur Batteries," In Proceedings of the Ground Vehicle Systems Engineering and Technology Symposium (GVSETS), NDIA, Novi, MI, Aug. 13-15 ... and reaction kinetics in Li-S batteries. The incorporation of defects in graphitic carbon nitride (g-C 3 N 4) has been ...
There is an increasing demand for high-energy batteries beyond lithium-ion batteries (LIBs) towards applications such as electric vehicles and drones 1,2,3 lfur has been considered as one of the ...
Introducing defects into two-dimensional materials can increase the ligand-unsaturated sites, thereby enhancing the redox catalysis of polysulphides this study, the selenium defects in the two-dimensional material VSe 2 can effectively improve the electrochemical performance of lithium-sulfur batteries. Compared with VSe 2, VSe 2−x could …
a) Charge/discharge evolution of a sulfur cathode with the corresponding conversion energy barriers; b) Schematic illustration of a Li–S battery with the nanocatalysts in cathodic and anodic side with modulating functions; c) Summary of the electrochemical kinetic modulators in Li–S batteries with advanced characterizations: from defect ...
Request PDF | On May 13, 2022, Yangchen Gao and others published Advanced Separator Enabled by Sulfur Defect Engineering for High-Performance Lithium–Sulfur Batteries | Find, read and cite all ...
The defect-rich catalysts developed for catalyzing and promoting the cycling and rate performance of Li–S batteries are mainly concentrated on the anionic vacancies. Currently, the hydrogen reduction …
In summary, the VSe 2−x /CNTs composite with selenium defects is prepared as an effective sulfur body for lithium-sulfur battery cathodes. Selenium vacancies are introduced on the surface and edges of the two-dimensional material to increase the catalytically active sites for polysulfide conversion reactions and improve the electrochemical ...
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