However, the shuttle effect of polysulfide results in severe issues, including the decrease of battery capacity and Coulombic efficiency. Furthermore, the degradation of cycle stability due to the poisoning of the lithium metal negative electrode hampers the practical application of Li S batteries.
The liquid electrolyte in a lithium–sulfur battery is important for the dissolution–deposition reaction through the solubility of polysulfides. To get insight into the sulfur chemistry, fundamental understanding of the dissolved polysulfides should be explored.
Lithium polysulfides (LiPSs) serve as vital intermediates in working Li–S batteries. However, the existing form of the LiPSs in electrolyte has not yet been clearly elucidated. Currently, LiPSs are mostly assumed to be fully disassociated, and polysulfide anions are typically regarded as the dominant species.
At present, most three-electrode batteries in lithium-sulfur system use lithium metal as the reference electrode, which is unfavorable for the accurate measurement of potential, because lithium metal has poor stability in LiPSs, and it is not an unpolarized electrode.
Lithium polysulfides (LiPSs) serve as vital intermediates that participate in every working electrochemical process of lithium–sulfur (Li–S) batteries. Revealing the existing form of LiPSs in electrolyte is essential for understanding the reaction mechanism and rationally designing high-performance Li–S batteries.
On one hand, high-order polysulfides diffuse across the membrane and subsequently react with the lithium metal negative electrode to produce low-order polysulfides. This phenomenon results in a side reaction cycle known as the “shuttle effect,” which reduces the coulombic efficiency of Li S batteries.
Polysulfide‐Shuttle Control in Lithium‐Sulfur Batteries with a ...
Figure 3f shows another Li-S battery configuration adopting a hybrid electrolyte system, including a sodium (Na) super ionic conductor (NaSICON)type solid electrolyte …
Targeted Electrocatalysis for High‐Performance Lithium–Sulfur …
This study explores platinum nanocatalysts to enhance lithium–sulfur batteries. Computational and experimental analyses show the catalyst improves polysulfide conversion, …
In-situ TEM observation of fast and stable reaction of lithium ...
DOI: 10.1016/J.JPOWSOUR.2021.230175 Corpus ID: 237656332; In-situ TEM observation of fast and stable reaction of lithium polysulfide infiltrated carbon composite and its …
Investigation of polypyrrole based composite material for lithium ...
Herein, polypyrrole based sulfur composite was prepared by simple method in hydrothermal teflon lined autoclave for Li-S battery. The S/SP/ppy/PVDF electrode exhibited …
Work principle and polysulfide shuttle in Li-S batteries
Work principle of Li-S battery. The problem is that reduction of sulfur proceeds via complicated multi-step mechanism and a variety of intermediate polysulfides of the general formula Li 2 S n …
Synergistic realization of fast polysulfide redox kinetics and stable ...
In order to meet the challenge of the increasingly severe energy crisis, the development and utilization of renewable energy such as secondary batteries have been …
Reduction mechanism of sulfur in lithium-sulfur battery: From elemental ...
These two reactions have been predicted to be strongly exothermic and exergonic in polar environments of either e = 8 or 78 (assuming free electrons delivered by the carbon …
Model Simulation of Lithium-Sulfur Battery Based on ...
The electrochemical reaction process of a lithium-sulfur battery is simplified as the following processes: the diffusion and precipitation-dissolution of lithium ions and …
Nucleophilic substitution between polysulfides and binders …
The nucleophilic substitution reaction of polysulfide on the binders is ... The 0.1 g polymer is soaked in the 1-mL 3-mmol/L long-chain lithium polysulfide (average formula Li 2 S …
Lithium-Sulfur Batteries
The Li–S battery is considered as a good candidate for the next generation of lithium batteries in view of its theoretical capacity of 1675 mAh g −1, which corresponds to …
The synergetic effect of lithium polysulfide and lithium nitrate to ...
Lithium dendrite growth is a serious hazard in battery operations. Here, the authors show that when using lithium polysulfide and lithium nitrate as additives in ether-based …
New lithium-sulfur battery design boosts lifespan and flexibility
54 · Despite the promise of this new battery technology, researchers have long faced a major hurdle in its commercialization — the charge and discharge process generates …
Modeling of the temporal evolution of polysulfide chains within the ...
The lithium-sulfur (Li-S) battery has been gaining more attention in research and industry in the last decade, as this technology is considered to be the next generation of …
Catalytic Conversion of Polysulfides in Li–S Batteries
Lee et al. designed MoS 2−x /reduced graphene oxide (MoS 2−x /rGO) to catalyze the polysulfide reactions and accelerate the conversion of LiPSs. The deficiencies in MoS 2 edge sites have …
In-situ TEM observation of fast and stable reaction of lithium ...
Lithium sulfur batteries (LSB) are attracting attention as a next generation energy storage device because of their high energy density, low cost, and environmental friendliness surpassing that …
Visualized redox reaction guides polysulfide synthesis with ...
The visualized redox reaction of a Li-S cell (Fig. 1 a) was designed to observe the electrochemical generation of liquid polysulfides directly during the discharging process.The …
Mitigating polysulfide crossover in lithium–sulfur batteries with ...
Introduction Lithium–sulfur (Li–S) batteries are emerging as a promising energy-storage alternative to conventional lithium-ion batteries (LIBs) by offering the …
Molecular modeling of electrolyte and polysulfide ions …
Lithium-sulfur (Li-S) batteries offer the promise of high theoretical capacity, 1670 mAh g −1 of sulfur, but need to overcome various problems such as the "shuttling" of polysulfides and cathode degradation due …
Effective Suppression of the Polysulfide Shuttle Effect in Lithium ...
In contrast, in the cell with the coated separator, the surface of lithium metal was found to be smoother (Figure Figure4 4 e), which is a clear indication of the protected …
Theoretical investigation on lithium polysulfide adsorption and ...
1. Introduction Lithium–sulfur (Li–S) batteries are considered as one of the most promising next-generation alternative batteries due to their high theoretical capacity of 1675 …
In-situ TEM observation of fast and stable reaction of lithium ...
Request PDF | In-situ TEM observation of fast and stable reaction of lithium polysulfide infiltrated carbon composite and its application as a lithium sulfur battery electrode …
Polysulfide driven degradation in lithium–sulfur batteries during ...
Since lithium-ion batteries (LIB) may be close to reaching their best possible performance regarding practical energy density, research in new battery materials is in high demand. 1 …
Thermodynamic aspect of sulfur, polysulfide anion and lithium ...
Thermodynamic aspect of sulfur, polysulfide anion and lithium polysulfide: Plausible reaction path during discharge of lithium-sulfur battery Journal: Physical Chemistry Chemical Physics …
Toward a Synergistic Optimization of Porous Electrode …
Request PDF | Toward a Synergistic Optimization of Porous Electrode Formulation and Polysulfide Regulation in Lithium–Sulfur Batteries | The use of functional …
Highly Reversible Lithium/Dissolved Polysulfide Batteries with …
The polysulfides characterized by the formula Li 2 S x with x = 4-8 are active liquid-state materials with strong chemical reaction activity and high solubility in the ether …
A saccharide-based binder for efficient polysulfide ...
Yuan, Z. et al. Powering lithium–sulfur battery performance by propelling polysulfide redox at sulfiphilic hosts. Nano Lett. 16, 519–527 (2016). Article ADS CAS PubMed …
Transport Properties of Polysulfide Species in Lithium–Sulfur Battery ...
Our findings allow for re-evaluation of the reactions regarding lithium polysulfide, lithium nitrate and lithium metal, and provide insights into solving the problems assocd. with …
Keeping Tabs on Polysulfides in Batteries
During battery operation, polysulfide ions are formed at the sulfur electrode, but they can dissolve into the electrolyte and eventually limit the battery performance. Calculations show extensive …
Pathways in Lithium-Sulfur Batteries Enhanced Polysulfide …
cells, the cathode was paired with Li foil (thickness: -75 μm; China Energy Lithium Co., Ltd) by a battery lamination technology. The electrolyte was 1 M LiTFSI in DOL DME (1:1 v/v) with 5 wt% …
A High‐Performance Polysulfide‐Trapping Lithium Sulfur Battery …
6 · Recently, transition metal oxides (TMOs) have been combined with carbon to form composites that trap and stabilize sulfur species during cycling and catalyze cathode reactions …