Efficient polysulfide shuttle mitigation by graphene-lithium cobalt vanadate hybrid for advanced lithium-sulfur batteries

Kannan, Sreekala Kunhi; Hareendrakrishnakumar, Haritha; Joseph, Mary Gladis

doi:10.1016/j.jelechem.2021.115665

Cited by 17 publications

(23 citation statements)

References 53 publications

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“…Additionally, the cyclic voltammogram of the cell with the CMS separator reveals a consistency in the position and intensity of peaks in the initial three cycles as shown in Figure b. These results further suggest the excellent reversibility and cyclability of the cell. , …”

Section: Resultsmentioning

confidence: 52%

“…The high-frequency intercept corresponds to the solution resistance that arises from the cell components and ionic motion in the electrolyte . In the case of the CG cell, a single semicircle corresponding to charge transfer resistance and an inclined line corresponding to Warburg impedance is present both before and after cycling . On contrary, the CMS cell consists of two semicircles, one in the high-frequency region and the other in the medium frequency region after cycling, corresponding to the charge transfer resistance and interfacial resistance of the coating along with Warburg impedance .…”

Section: Resultsmentioning

confidence: 99%

“…With the steady depletion of fossil fuels and the emergence of major environmental issues, next-generation rechargeable secondary batteries with higher energy density and lower costs have become an extremely viable and promising option . Lithium–sulfur (Li–S) batteries yield a theoretical capacity of 1675 mAh g –1 through the electrochemical reaction between lithium and sulfur, which has piqued researchers’ interest. − Additionally, the fascinating virtues of sulfur including its natural abundance, cost-effectiveness, and non-toxic nature, make it an appealing cathode material. − However, a number of non-negligible constraints impede the widespread usage of lithium–sulfur batteries, which primarily include the (i) insulation property of sulfur, − (ii) volume expansion of sulfur upon continuous charge–discharge, , (iii) polysulfide shuttle effect wherein the intermediate reaction products dissolve in the organic electrolyte and shuttle between the anode and cathode, giving rise to a low Coulombic efficiency and high self-discharge, − and finally, (iv) lithium dendritic growth …”

Section: Introductionmentioning

confidence: 99%

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Synergistic Restriction to Polysulfides by a Carbon Nanotube/Manganese Sulfide-Decorated Separator for Advanced Lithium–Sulfur Batteries

Kannan

Hareendrakrishnakumar

Joseph

et al. 2022

Energy Fuels

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Polysulfide dissolution and shuttling limit the capacity output and cycle life of lithium−sulfur batteries to a great extent. Separator modification using polar materials exploiting the ability to entrap polysulfides has been demonstrated as an effective approach to deal with the conundrum of polysulfide shuttling. Herein, a carbon nanotube/manganese sulfide nanocomposite is designed as a separator modifier in lithium−sulfur batteries for the first time. Furthermore, the carbon nanotube network provides a continuous network for rapid electronic conduction, imparts structural stability, and acts as a secondary barrier for polysulfides. Consequently, the cell displays an initial discharge capacity of 876 mAh g −1 at 0.5 C and sustains excellent stability with a retained capacity of 76% after 500 cycles. The self-discharge of the cell is also conspicuously reduced, maintaining a constant voltage for 100 h under open-circuit conditions. The electrochemical results represent an effective strategy to realize better performing Li−S batteries.

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Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synergistic Restriction to Polysulfides by a Carbon Nanotube/Manganese Sulfide-Decorated Separator for Advanced Lithium–Sulfur Batteries

Kannan

Hareendrakrishnakumar

Joseph

et al. 2022

Energy Fuels

Self Cite

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“…It enhances the reflection loss, conduction loss, and polarization loss which may contribute to the attenuation of EM waves, making it a fascinating filler for enhancing EMI shielding properties. The electrical conductivity of GN decreases with an increase in the number of GN layers, which in turn leads to excellent thermal conductivity. ,, It can be easily homogeneously dispersed with PAN in dimethylformamide (DMF) for electrospinning.…”

Section: Electrospun Polymer Composite Fibers With Different Types Of...mentioning

confidence: 99%

“…The electrical conductivity of GN decreases with an increase in the number of GN layers, which in turn leads to excellent thermal conductivity. 48,93,94 It can be easily homogeneously dispersed with PAN in dimethylformamide (DMF) for electrospinning.…”

Section: Graphene (Gn)mentioning

confidence: 99%

Progress in Electrospun Polymer Composite Fibers for Microwave Absorption and Electromagnetic Interference Shielding

Sharma

James

2021

ACS Appl. Electron. Mater.

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Advancements in technology and widespread usage of electronic equipment have led to a vast hike in electromagnetic pollution such as electromagnetic interference (EMI). This has resulted in major concerns regarding human health and improper functioning of electronic devices. Therefore, high-performance EMI shielding materials are necessary to ensure human well-being and protect systems in domestic, civil, or military applications. Earlier, metals and alloys of metals served as EMI shielding materials. But due to their heavy weight, low corrosion resistance, and advancements in miniaturization of electronic devices, currently, metals have only restricted applications in EMI shielding. Thus, flexible, lightweight, and high-performance EMI shielding materials assume great significance. Polymer composites have emerged as a better alternative to EMI shielding materials because of their light weight, corrosion resistance, and ease of fabrication. This article reviews the important literature on electrospun polymer composite fibers for EMI shielding applications. Fabrication methods and different types of fillers and their influence on EMI shielding properties are discussed in detail. The article tries to highlight the huge potential of the electrospinning technique toward the development of specialty materials for EMI shielding.

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Enhanced Physico‐Chemical Polysulfide Curtailment Using Carbon Nanotube‐Binary Metal Sulfide Nanocomposite for High‐Performance Lithium‐Sulfur Batteries

Kannan,

Joseph,

Joseph

2024

Energy Tech

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The electrochemical output of lithium‐sulfur batteries is highly restricted by the dissolution and shuttling of polysulfide intermediates, which leads to the polysulfide shuttle effect. The binary metal sulfides offer a greater number of active sites and better polysulfide interaction compared to the unitary metal sulfides. Herein, a nickel cobalt sulfide‐carbon nanotube nanocomposite is devised as a highly efficient separator coater for high‐energy Li‐S batteries. The nanocomposite is featured with superior polysulfide confinement ability due to its dual metal sites and improved ionic and electronic conductivity. The material also possesses enhanced electrolyte wettability, better interfacial properties, and frequent electrolyte uptake. By virtue of the above‐mentioned superiorities, the cell reveals an initial discharge capacity of 1152 mAh g−1 at 0.5 C rate and maintains a retained capacity of 82% after 500 cycles. The cell also shows significant electrochemical results with a magnificent rate delivery of 714 mAh g−1 at 2 C rate and maintains a constant open‐circuit potential for 100 h.

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Efficient polysulfide shuttle mitigation by graphene-lithium cobalt vanadate hybrid for advanced lithium-sulfur batteries

Cited by 17 publications

References 53 publications

Synergistic Restriction to Polysulfides by a Carbon Nanotube/Manganese Sulfide-Decorated Separator for Advanced Lithium–Sulfur Batteries

Synergistic Restriction to Polysulfides by a Carbon Nanotube/Manganese Sulfide-Decorated Separator for Advanced Lithium–Sulfur Batteries

Progress in Electrospun Polymer Composite Fibers for Microwave Absorption and Electromagnetic Interference Shielding

Enhanced Physico‐Chemical Polysulfide Curtailment Using Carbon Nanotube‐Binary Metal Sulfide Nanocomposite for High‐Performance Lithium‐Sulfur Batteries

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