Sulfonic groups stemmed ionic shield for polysulfides towards high performance Li–S batteries

Hareendrakrishnakumar, Haritha; Chulliyote, Reshma; Joseph, Mary Gladis; Suriyakumar, Shruti; Stephan, A. Manuel

doi:10.1016/j.electacta.2019.134697

Cited by 23 publications

(38 citation statements)

References 61 publications

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“…This result demonstrates that the PP separator is oxidized and oxygen-containing chemical groups are formed on its surface, which is favorable of assembling FeOOH particles. Besides, it is reported that the oxygen-containing groups are able to provide electrostatic repulsive force to interact with polysulfide and have an effect on hindering the shuttle effect. − Therefore, the excellent stability of the FeOOH layer primarily is due to the chemical self-assembly.…”

Section: Resultsmentioning

confidence: 99%

Novel Bifunctional Separator with a Self-Assembled FeOOH/Coated g-C₃N₄/KB Bilayer in Lithium–Sulfur Batteries

Wang

Yang

Chen

et al. 2020

ACS Appl. Mater. Interfaces

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Separator modification with metal oxide and carbon composite recently has become a potential and competitive way to confine polysulfide diffusion and mitigate the shuttling effect. However, other modification methods also have an impact on the stability of the modified layer and the enhancement of electrochemical performance. Herein, we first design a novel bifunctional separator combined with one self-assembled FeOOH layer via a chemical way and one conductive g-C 3 N 4 /KB layer by physical coating. Different from directly coating the metal oxide and carbon composite on the separator, the self-assembled FeOOH layer is firmly formed on the PP separator, which enables the chemical capture of the soluble polysulfide and prohibit the shuttling effect. Then, the coated g-C 3 N 4 /KB layer is further introduced to greatly enhance the transportation of lithium ions and physically confine the migration of intermediates. As a result, the battery with this bifunctional separator (G-SFO) achieves outstanding rate capacities (1000, 901, and 802 mA h/g at 0.5, 1, and 2 C). After 900 cycles at 1 C, it also shows excellent long cycle performance, with relatively low fading (0.055%). This original fabrication will present a new and feasible strategy for fabricating a bifunctional separator with metal oxide and carbon material.

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Section: Resultsmentioning

confidence: 99%

Novel Bifunctional Separator with a Self-Assembled FeOOH/Coated g-C₃N₄/KB Bilayer in Lithium–Sulfur Batteries

Wang

Yang

Chen

et al. 2020

ACS Appl. Mater. Interfaces

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“…The self-discharge trend of the cells was analyzed by measuring the open-circuit voltage (OCV) for a particular period of time …”

Section: Methodsmentioning

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%

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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“…The sulfur composite was prepared as reported elsewhere. 36 The obtained highly viscous slurry was then coated on aluminium foil and the foil was dried in an air oven at 70 1C. The electrode was then dried in a vacuum glass oven at 110 1C for 6 hours prior to cell assembly.…”

Section: Modification Of the Separatormentioning

confidence: 99%

A porous organic polymer-coated permselective separator mitigating self-discharge of lithium–sulfur batteries

et al. 2020

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Sulfonic groups stemmed ionic shield for polysulfides towards high performance Li–S batteries

Cited by 23 publications

References 61 publications

Novel Bifunctional Separator with a Self-Assembled FeOOH/Coated g-C₃N₄/KB Bilayer in Lithium–Sulfur Batteries

Novel Bifunctional Separator with a Self-Assembled FeOOH/Coated g-C₃N₄/KB Bilayer in Lithium–Sulfur Batteries

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

A porous organic polymer-coated permselective separator mitigating self-discharge of lithium–sulfur batteries

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Sulfonic groups stemmed ionic shield for polysulfides towards high performance Li–S batteries

Cited by 23 publications

References 61 publications

Novel Bifunctional Separator with a Self-Assembled FeOOH/Coated g-C3N4/KB Bilayer in Lithium–Sulfur Batteries

Novel Bifunctional Separator with a Self-Assembled FeOOH/Coated g-C3N4/KB Bilayer in Lithium–Sulfur Batteries

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

A porous organic polymer-coated permselective separator mitigating self-discharge of lithium–sulfur batteries

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Product

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Novel Bifunctional Separator with a Self-Assembled FeOOH/Coated g-C₃N₄/KB Bilayer in Lithium–Sulfur Batteries

Novel Bifunctional Separator with a Self-Assembled FeOOH/Coated g-C₃N₄/KB Bilayer in Lithium–Sulfur Batteries