Multifunctional MoSe2@rGO coating on the cathode versus the separator as an efficient polysulfide barrier for high-performance lithium-sulfur battery

You, Yu-Wei; Wei, M.; Yang, Likun; Wang, Jingwen; Zhang, Yongxing; Xu, Jun

doi:10.1016/j.apsusc.2020.146785

Cited by 50 publications

(15 citation statements)

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“…To overcome the above‐mentioned issues and improve the electrochemical performance of LSBs, many efforts have been devoted to developing advanced sulfur hosts and multifunctional separators. [ 17 , 18 , 19 , 20 , 21 , 22 , 23 ] The carbonaceous materials, such as mesoporous carbon (CMK‐3), [ 24 , 25 ] reduced graphene oxide, [ 26 , 27 ] carbon nanotubes, [ 28 , 29 ] multichannel fibers, [ 30 , 31 , 32 ] were adopted as advanced sulfur hosts to reduce the capacity fading. These carbon‐based host materials typically have essential characteristics of high electronic conductivity, large specific surface area, and porous structures, which can improve the conductivity, realize high sulfur loading and reduce the influence of volumetric expansion.…”

Section: Introductionmentioning

confidence: 99%

Sandwiched Cathodes Assembled from CoS₂‐Modified Carbon Clothes for High‐Performance Lithium‐Sulfur Batteries

Yang

Cao

et al. 2021

Advanced Science

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Structural design of advanced cathodes is a promising strategy to suppress the shuttle effect for lithium‐sulfur batteries (LSBs). In this work, the carbon cloth covered with CoS2 nanoparticles (CC‐CoS2) is prepared to function as both three‐dimensional (3D) current collector and physicochemical barrier to retard migration of soluble lithium polysulfides. On the one hand, the CC‐CoS2 film works as a robust 3D current collector and host with high conductivity, high sulfur loading, and high capability of capturing polysulfides. On the other hand, the 3D porous CC‐CoS2 film serves as a multifunctional interlayer that exhibits efficient physical blocking, strong chemisorption, and fast catalytic redox reaction kinetics toward soluble polysulfides. Consequently, the Al@S/AB@CC‐CoS2 cell with a sulfur loading of 1.2 mg cm−2 exhibits a high rate capability (≈823 mAh g−1 at 4 C) and delivers excellent capacity retention (a decay of ≈0.021% per cycle for 1000 cycles at 4 C). Moreover, the sandwiched cathode of CC‐CoS2@S/AB@CC‐CoS2 is designed for high sulfur loading LSBs. The CC‐CoS2@S/AB@CC‐CoS2 cells with sulfur loadings of 4.2 and 6.1 mg cm−2 deliver high reversible capacities of 1106 and 885 mAh g−1, respectively, after 100 cycles at 0.2 C. The outstanding electrochemical performance is attributed to the sandwiched structure with active catalytic component.

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Section: Introductionmentioning

confidence: 99%

Sandwiched Cathodes Assembled from CoS₂‐Modified Carbon Clothes for High‐Performance Lithium‐Sulfur Batteries

Yang

Cao

et al. 2021

Advanced Science

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“…3(b), for the pure S electrode, the voltage dropped to 2.1 V with the increase of rest time. However, for the CO‐NSs/S composite electrode, with the increase of the rest time, the voltage remained stable at 2.4 V. It is generally known that the capacity of lithium‐sulfur batteries is mainly attributed from the voltages 2.3 and 2.1 V 24 . As a result, the capacity of pure S electrode is smaller than that of the CO‐NSs/S electrode.…”

Section: Resultsmentioning

confidence: 91%

Novel ceric dioxide nanospheres as sulfur hosts for advanced electrochemical performance of lithium‐sulfur batteries

Zhou

2021

J of Chemical Tech & Biotech

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BACKGROUND Metal oxides are promising sulfur host materials because of their superior adsorption ability. Based on this theme, ceric dioxide (CeO2) nanospheres with mesoporous structure were synthesized and designed as host materials to form CeO2 nanospheres/sulfur (CO‐NSs/S) composites. RESULTS The as‐prepared CO‐NSs/S composites with sulfur content of 71% exhibited an initial high discharge capacity of 1396 mAh g−1 at the current density of 0.1 C. In addition, an excellent cycling stability with a reversible capacity of 678 mAh g−1 was obtained at 2 C after 500 discharge/charge cycles. CONCLUSION The advanced improvements of electrochemical performance are ascribed to the presence of metal oxide ceric dioxide nanospheres with mesoporous structure, which could not only inhibit the dissolution and migration of soluble polysulfide during the electrochemical cycles, but also improve the electronic conductivity of the element sulfur. © 2021 Society of Chemical Industry

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“…The initial discharge specific capacities of IL-CNCs cells with 0.1, 0.05, and 0.025 mg cm –2 coating are 1230, 1073, and 1071 mAh g –1 , respectively, which are all superior to the SP-coating (979 mAh g –1 at 0.1 mg cm –2 ) and no coating (872 mAh g –1 ) cells. After 100 cycles, the reversible capacity of IL-CNCs cells with 0.1 mg cm –2 coating can remain over 1000 mAh g –1 , which is better than many other carbon-coated separators. − Moreover, a reversible capacity of IL-CNCs coating with only 0.025 mg cm –2 can reach 747 mAh g –1 , which is equivalent to that of SP coating with 4 times mass coating. It can be seen that IL-CNCs exhibit great advantages in lowering the load of the coating separators.…”

Section: Resultsmentioning

confidence: 97%

Interlinked Carbon Nanocages-Coated Separator as an Efficient Trap for Soluble Polysulfides in a Lithium–Sulfur Battery

Yang

Zhang

et al. 2021

Energy Fuels

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The utilization of carbon-coating materials to inhibit the shuttle effect of the polysulfides is an important theme for lithium–sulfur (Li–S) batteries. However, the structure of carbon materials and the way that they are packed are important factors, because they determine the number and size of pores of future layers and, consequently, the permeability of ions. This work presents interlinked carbon nanocages (IL-CNCs) as the coating materials for the separators of Li–S batteries. The surface morphology, pore structure, and cyclic performances as well as the rate properties of the composite separators were fully analyzed. IL-CNCs coatings offer abundant surfaces and an interface to trap polysulfide as well as a long transmission distance to prevent polysulfide ions from penetrating the membrane. The IL-CNCs-coated separators exhibit excellent electrochemical properties in different rates, a long cycling time at 1 C, and a high cathode loading. Moreover, only 0.025 mg cm–2 of IL-CNCs coating can obtain a reversible capacity of 747 mAh g–1 after 100 cycles at 0.2 C.

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Multifunctional MoSe2@rGO coating on the cathode versus the separator as an efficient polysulfide barrier for high-performance lithium-sulfur battery

Cited by 50 publications

References 53 publications

Sandwiched Cathodes Assembled from CoS₂‐Modified Carbon Clothes for High‐Performance Lithium‐Sulfur Batteries

Sandwiched Cathodes Assembled from CoS₂‐Modified Carbon Clothes for High‐Performance Lithium‐Sulfur Batteries

Novel ceric dioxide nanospheres as sulfur hosts for advanced electrochemical performance of lithium‐sulfur batteries

Interlinked Carbon Nanocages-Coated Separator as an Efficient Trap for Soluble Polysulfides in a Lithium–Sulfur Battery

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Multifunctional MoSe2@rGO coating on the cathode versus the separator as an efficient polysulfide barrier for high-performance lithium-sulfur battery

Cited by 50 publications

References 53 publications

Sandwiched Cathodes Assembled from CoS2‐Modified Carbon Clothes for High‐Performance Lithium‐Sulfur Batteries

Sandwiched Cathodes Assembled from CoS2‐Modified Carbon Clothes for High‐Performance Lithium‐Sulfur Batteries

Novel ceric dioxide nanospheres as sulfur hosts for advanced electrochemical performance of lithium‐sulfur batteries

Interlinked Carbon Nanocages-Coated Separator as an Efficient Trap for Soluble Polysulfides in a Lithium–Sulfur Battery

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Sandwiched Cathodes Assembled from CoS₂‐Modified Carbon Clothes for High‐Performance Lithium‐Sulfur Batteries

Sandwiched Cathodes Assembled from CoS₂‐Modified Carbon Clothes for High‐Performance Lithium‐Sulfur Batteries