Wrinkled sulfur@graphene microspheres with high sulfur loading as superior-capacity cathode for Li S batteries

He, Jian; Zhou, Keren; Chen, Yuanfu; Xu, Chen; Lin, Jie; Zhang, Wanli

doi:10.1016/j.mtener.2016.10.001

Cited by 38 publications

(16 citation statements)

References 42 publications

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“…As shown in Figure 3b, after loading sulfur into ReS 2 @CNT matrix, new peaks appear in the range of 100–550 cm −1 , corresponding to the characteristic Raman peaks of sulfur. [ 26 ] The peaks of ReS 2 are overlapped by the peaks of sulfur, which suggests a high content of sulfur in ReS 2 @CNT/S. The XRD pattern of ReS 2 @CNT is shown in Figure 3c.…”

Section: Figurementioning

confidence: 99%

1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

Bhargav

Asl

et al. 2020

Advanced Energy Materials

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The practical viability of Li–S cells depends on achieving high electrochemical utilization of sulfur under realistic conditions, such as high sulfur loading and low electrolyte/sulfur (E/S) ratio. Here, metallic 2D 1T′‐ReS2 nanosheets in situ grown on 1D carbon nanotubes (ReS2@CNT) via a facile hydrothermal reaction are presented to efficiently suppress the “polysulfide shuttle” and promote lithium polysulfide (LiPS) redox reactions. The designed ReS2@CNT nanoarchitecture with high conductivity and rich nanoporosity not only facilitates electron transfer and ion diffusion, but also possesses abundant active sites providing high catalytic activity for efficient LiPS conversion. Li–S cells fabricated with ReS2@CNT exhibit high capacity with superior long‐term cyclability with a capacity retention of 71.7% over 1000 cycles even at a high current density of 1C (1675 mA g−1). Also, pouch cells fabricated with the ReS2@CNT/S cathode maintain a low capacity fade rate of 0.22% per cycle. Furthermore, the electrocatalysis mechanism is revealed based on electrochemical studies, theoretical calculations, and in situ Raman spectroscopy.

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Section: Figurementioning

confidence: 99%

1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

Bhargav

Asl

et al. 2020

Advanced Energy Materials

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165

103

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“…Strenuous efforts have been made to enhance the electrochemical performance of Li–S batteries, such as incorporating sulfur into conductive hosts, coating separators with interlayers, applying functional binders, and developing new electrolytes/additives . Among those strategies, using the carbonaceous materials as sulfur hosts is considered to be one of the most effective ways to improve the electrical conductivity of the electrode and immobilize the intermediate lithium polysulfides . However, as the nonpolar carbon only offers weak physical entrapment to the polar polysulfides, the carbon–sulfur composites still suffer from severe decay over long‐term cycling …”

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confidence: 99%

Yolk–Shelled C@Fe₃O₄ Nanoboxes as Efficient Sulfur Hosts for High‐Performance Lithium–Sulfur Batteries

et al. 2017

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Owing to the high theoretical specific capacity (1675 mA h g ) and low cost, lithium-sulfur (Li-S) batteries offer advantages for next-generation energy storage. However, the polysulfide dissolution and low electronic conductivity of sulfur cathodes limit the practical application of Li-S batteries. To address such issues, well-designed yolk-shelled carbon@Fe O (YSC@Fe O ) nanoboxes as highly efficient sulfur hosts for Li-S batteries are reported here. With both physical entrapment by carbon shells and strong chemical interaction with Fe O cores, this unique architecture immobilizes the active material and inhibits diffusion of the polysulfide intermediates. Moreover, due to their high conductivity, the carbon shells and the polar Fe O cores facilitate fast electron/ion transport and promote continuous reactivation of the active material during the charge/discharge process, resulting in improved electrochemical utilization and reversibility. With these merits, the S/YSC@Fe O cathodes support high sulfur content (80 wt%) and loading (5.5 mg cm ) and deliver high specific capacity, excellent rate capacity, and long cycling stability. This work provides a new perspective to design a carbon/metal-oxide-based yolk-shelled framework as a high sulfur-loading host for advanced Li-S batteries with superior electrochemical properties.

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“…Also, they can be selected amongst the relatively well-known references commonly used for electrode formulation. Since pristine graphene does not disperse in water-based solution/suspensions, graphene oxide (GO) nanosheets suspensions (about which even less is usually known than in the case of CNT) are used and reduction to graphene (reduced graphene oxide—RGO) is achieved by heat treatment or, much less often, by chemical reduction with hydrazine vapor [37,60,83]. …”

Section: Formulation Of Solutions/suspensions: Organic/carbon Compmentioning

confidence: 99%

“…Regarding emerging technologies, spray-drying is receiving interest as a tool to prepare porous carbon hosts for sulfur/selenium in Li-sulfur [23,24,34,37,38,39,116,120,128,377,385] or Li-selenium [83,378] batteries. Similarly, reduced graphene oxide microspheres with high surface area were tested in Li-air batteries [32].…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Spray-Drying of Electrode Materials for Lithium- and Sodium-Ion Batteries

et al. 2018

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The performance of electrode materials in lithium-ion (Li-ion), sodium-ion (Na-ion) and related batteries depends not only on their chemical composition but also on their microstructure. The choice of a synthesis method is therefore of paramount importance. Amongst the wide variety of synthesis or shaping routes reported for an ever-increasing panel of compositions, spray-drying stands out as a versatile tool offering demonstrated potential for up-scaling to industrial quantities. In this review, we provide an overview of the rapidly increasing literature including both spray-drying of solutions and spray-drying of suspensions. We focus, in particular, on the chemical aspects of the formulation of the solution/suspension to be spray-dried. We also consider the post-processing of the spray-dried precursors and the resulting morphologies of granules. The review references more than 300 publications in tables where entries are listed based on final compound composition, starting materials, sources of carbon etc.

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Wrinkled sulfur@graphene microspheres with high sulfur loading as superior-capacity cathode for Li S batteries

Cited by 38 publications

References 42 publications

1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

Yolk–Shelled C@Fe₃O₄ Nanoboxes as Efficient Sulfur Hosts for High‐Performance Lithium–Sulfur Batteries

Spray-Drying of Electrode Materials for Lithium- and Sodium-Ion Batteries

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Wrinkled sulfur@graphene microspheres with high sulfur loading as superior-capacity cathode for Li S batteries

Cited by 38 publications

References 42 publications

1T′‐ReS2 Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

1T′‐ReS2 Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

Yolk–Shelled C@Fe3O4 Nanoboxes as Efficient Sulfur Hosts for High‐Performance Lithium–Sulfur Batteries

Spray-Drying of Electrode Materials for Lithium- and Sodium-Ion Batteries

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1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

Yolk–Shelled C@Fe₃O₄ Nanoboxes as Efficient Sulfur Hosts for High‐Performance Lithium–Sulfur Batteries