The Significance of Elemental Sulfur Dissolution in Liquid Electrolyte Lithium Sulfur Batteries

Harks, Peter Paul R. M. L.; Robledo, Carla; Verhallen, Tomas W.; Notten, Peter H. L.; Mulder, Fokko M.

doi:10.1002/aenm.201601635

Cited by 103 publications

(73 citation statements)

References 32 publications

(18 reference statements)

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“…Figure c quantitatively shows the origin of capacity fading during the cycling. As converting sulfur to LiPSs is a kinetically favorable process owing to the slight dissolution of sulfur, the mild discharge rate (0.1 C) ensures sufficient time to reduce sulfur to LiPSs of various chain lengths, in response to excellent retention of Q H . However, once the poorly conductive and insoluble Li 2 S 2 /Li 2 S precipitates covered the limited conductive surface, the reduction of soluble LiPSs to solid Li 2 S 2 /Li 2 S would experience a very high charge‐transfer barrier that may be terminated by the cutoff voltage.…”

Section: Resultsmentioning

confidence: 99%

Nonuniform Redistribution of Sulfur and Lithium upon Cycling: Probing the Origin of Capacity Fading in Lithium–Sulfur Pouch Cells

et al. 2019

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Lithium–sulfur (Li–S) batteries have emerged as a promising candidate for the next‐generation high‐energy‐density system for energy‐demanding applications. Despite innovations in concepts and materials that significantly improve the electrochemical performance of coin cells, Li–S pouch cells have the disadvantages of short cycle life and inferior rate capability in comparison with coin cells. Bridging the fundamentals of Li–S chemistry to the hindrance on its practical application is of great importance for the development of Li–S batteries. Herein, the nonuniformity of the distribution of sulfur and lithium upon cycling is probed as one of the origins for the rapid capacity fading in a Li–S pouch cell. In particular, the nonuniform evolution of sulfur/lithium distribution impairs the discharge capacity of a low‐voltage plateau. Lithium polysulfide intermediates produced on discharge tend to diffuse toward the bottom of a pouch cell, leading to agglomeration of sulfur and thus passivating the cathode. The migration of polysulfides also etches lithium away from the central region of the anode and induces nonuniform anode pulverization. Herein, the importance of a rational design of a pouch cell to mitigate the nonuniform redistribution of the active material toward stable Li–S pouch cells is highlighted.

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Section: Resultsmentioning

confidence: 99%

Nonuniform Redistribution of Sulfur and Lithium upon Cycling: Probing the Origin of Capacity Fading in Lithium–Sulfur Pouch Cells

et al. 2019

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“…Besides, sulfur is insulating for both lithium ions and electrons, leading to sluggish redox reaction kinetics and limited active material utilization [12]. These intrinsic issues during sulfur conversion reaction result in an undesirable battery performance, including low capacity, low coulombic efficiency and short cycle life.…”

Section: Introductionmentioning

confidence: 99%

Binary graphene-based cathode structure for high-performance lithium-sulfur batteries

et al. 2020

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Lithium-sulfur (Li-S) batteries are highly appealing for the next-generation of energy storage because of their high energy density and low-cost features. However, the practical implementation of Li-S batteries has been hindered by fast performance degradation of the sulfur cathode, especially at a high cathode loading. Here, we propose a strategic design of binary graphene foam (BGF) as the cathode scaffold, with the incorporation of nitrogen-doped graphene and highly porous graphene. The nitrogen-doped graphene provides chemical adsorption sites for migrating polysulfides, and the highly porous graphene could increase the cathode conductivity and accelerate lithium ion transport. The freestanding foam-like cathode structure further offers a robust, interconnected, conductive framework to promote the redox reaction even at a high cathode loading. Therefore, the Li-S battery with the S/BGF electrode exhibits a high specific areal capacity over 10 mAh cm -2 and good cycling stability over 300 cycles. This approach offers insights into multifunctional electrode structure design, with targeted functions for high-performance Li-S batteries.

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“…[1À 3] An increase in the energy density of LIBs can be achieved by developing high-capacity negative and positive electrode materials. In terms of the positive electrode, new, environmentally friendly and abundant materials such as sulfur [4][5][6][7][8][9][10] and oxygen [11][12][13][14][15] hold great promise for realizing next generation lithium-ion batteries with high energy densities. On the other hand, the ideal negative electrode candidate would be, without a doubt, metallic lithium.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Energy Storage of Fe₃O₄ Nanoparticles Embedded in N‐Doped Graphene

et al. 2020

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We report the synthesis and application of a material composed of Fe3O4 nanoparticles embedded in N‐doped graphene sheets (Fe3O4@N‐doped graphene) as a negative electrode for Li batteries. We study the influence of N‐doped graphene on the storage capacity of Fe3O4 using different electrochemical techniques. The as‐prepared Fe3O4 materials presented high‐quality crystalline nanostructures. The N‐doped graphene sheets improve the conductivity between the Fe3O4 nanoparticles, allowing a faster charge transfer process than that for pure magnetite, as well as the presence of porous particles in the hybrid composite. The Fe3O4@N‐doped graphene material show the best Li storage capacity maintaining specific capacity values of 910 mA h g−1 during 150 cycles performed at 0.05 A g−1 and 850 mA h g−1 at 0.1 A g−1 during the following 50 cycles. The N‐doped graphene sheets resist the volume changes that occur during cycling processes in rate capability experiments. We provide a simple and novel method to obtain a material with a higher superficial area and conductivity between particles, allowing great performance as a negative electrode for Li batteries application.

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The Significance of Elemental Sulfur Dissolution in Liquid Electrolyte Lithium Sulfur Batteries

Cited by 103 publications

References 32 publications

Nonuniform Redistribution of Sulfur and Lithium upon Cycling: Probing the Origin of Capacity Fading in Lithium–Sulfur Pouch Cells

Nonuniform Redistribution of Sulfur and Lithium upon Cycling: Probing the Origin of Capacity Fading in Lithium–Sulfur Pouch Cells

Binary graphene-based cathode structure for high-performance lithium-sulfur batteries

Enhanced Energy Storage of Fe₃O₄ Nanoparticles Embedded in N‐Doped Graphene

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The Significance of Elemental Sulfur Dissolution in Liquid Electrolyte Lithium Sulfur Batteries

Cited by 103 publications

References 32 publications

Nonuniform Redistribution of Sulfur and Lithium upon Cycling: Probing the Origin of Capacity Fading in Lithium–Sulfur Pouch Cells

Nonuniform Redistribution of Sulfur and Lithium upon Cycling: Probing the Origin of Capacity Fading in Lithium–Sulfur Pouch Cells

Binary graphene-based cathode structure for high-performance lithium-sulfur batteries

Enhanced Energy Storage of Fe3O4 Nanoparticles Embedded in N‐Doped Graphene

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Product

Resources

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Enhanced Energy Storage of Fe₃O₄ Nanoparticles Embedded in N‐Doped Graphene