MoS2-decorated coaxial nanocable carbon aerogel composites as cathode materials for high performance lithium-sulfur batteries

Li, Xueliang; Zhao, Kun; Zhang, Luyao; Ding, Zhongqiang; Hu, Kuan

doi:10.1016/j.jallcom.2016.09.004

Cited by 59 publications

(23 citation statements)

References 39 publications

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“…This scheme suppresses the Li reactivity and gas generation during the charge/discharge . However, it only focuses on the anode side and cannot effectively prevent the capacity degradation . It is noted that various porous conductive matrices, for example, porous carbons, graphenes, carbon nanotubes, and and nanofibers were employed to infiltrate the molten sulfur.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalysis on Separator Modified by Molybdenum Trioxide Nanobelts for Lithium–Sulfur Batteries

Imtiaz

Zafar

Razaq

et al. 2018

Adv Materials Inter

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has substantially increased. [1] Accordingly, lithium-sulfur batteries (LSBs) have gained much attraction as future-generation rechargeable batteries due to the exceptional-specific energy density of 2600 Wh kg −1 and theoretical-specific capacity of 1675 mAh g −1 , which are significantly higher than those of the traditional lithium-ion batteries. [2] Regardless of the great potential, LSBs face some great challenges that hinder their commercialization. Some of the major challenges are the low active material utilization, which is a consequence of the insulating nature of orthorhombic sulfur and its discharged products, volume expansion during redox reactions, and shuttle effect that occurs due to dissolution of long-chain lithium polysulfides (Li 2 S x , 4 ≤ x ≤ 8) into the electrolyte, allowing the formation of insoluble, insulating Li 2 S 2 /Li 2 S precipitates on the surface of lithium anode and sulfur cathode. The dissolution of polysulfides not only retards the reaction kinetics of the electrodes, but also causes low Coulombic efficiency, rapid capacity fading, and poor cycle life of the LSBs. [3] Meanwhile, the lithium is highly reactive and the gas generation during cycling also results in speedy capacity degradation of LSBs. [4] Lithium-sulfur batteries (LSBs) have been regarded as the supreme feasible future generation energy storage system for high-energy applications due to the exceptional-specific energy density of 2600 Wh kg −1 and theoretical-specific capacity of 1675 mAh g −1 . Nevertheless, some key challenges which are linked with polysulfide shuttling and sluggish kinetics of polysulfide conversion are the main obstacles in the high electrochemical performance of LSBs. Here, a molybdenum trioxide (MoO 3 ) nanobelt catalytic layer is fabricated on the separator to solve these issues. The MoO 3 layer shows strong chemical interaction with polysulfides by successfully blocking the polysulfides on the separator from shuttling and significantly accelerates the redox reaction of polysulfide conversion. Furthermore, the randomly arranged layers of MoO 3 nanobelts possess enough porous networks that provide effective space for electrolyte infiltration and facile pathway for fast ion transportation. The resultant LSBs exhibit a very high initial capacity of 1377 mAh g −1 . After 200 cycles at 0.5 C, the capacity is 684.4 mAh g −1 with the fading rate of only 0.251% per cycle. Additionally, the MoO 3 modification provides good surface protection of lithium anode and depresses the lithium anode degradation. Battery Performance

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Section: Introductionmentioning

confidence: 99%

Electrocatalysis on Separator Modified by Molybdenum Trioxide Nanobelts for Lithium–Sulfur Batteries

Imtiaz

Zafar

Razaq

et al. 2018

Adv Materials Inter

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show abstract

“…In addition, other nanocarbon materials can be used to construct 3D structures with MoS 2 .L i et al reported the fabrication of au nique MoS 2 nanoparticle decorated CNCA containing multiwalled carbon nanotubes (MWCNTs)a nd carbon aerogel as host materials for sulfur (MoS 2 -S-G). [55] The fabricated sulfur cathodes deliver ad is-charge capacity of 1343 mA hg À1 at 0.2 C, with ac apacity retention of 81 %a fter 200 cycles. The good electrochemical performance could be ascribed to the designed superior nanostructures.…”

Section: Mos 2 /Carbon3ds Tructural Cathodesmentioning

confidence: 96%

“…Li et al. reported the fabrication of a unique MoS 2 nanoparticle decorated CNCA containing multiwalled carbon nanotubes (MWCNTs) and carbon aerogel as host materials for sulfur (MoS 2 ‐S‐G) . The fabricated sulfur cathodes deliver a discharge capacity of 1343 mA h g −1 at 0.2 C, with a capacity retention of 81 % after 200 cycles.…”

Section: Structural Designmentioning

confidence: 99%

Two‐Dimensional MoS₂ for Li−S Batteries: Structural Design and Electronic Modulation

Cao

Lin

et al. 2019

ChemSusChem

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Two‐dimensional molybdenum disulfide (MoS2) nanosheets attract great interest for applications in lithium–sulfur (Li−S) batteries, due to their unique physical and chemical properties, which originate from diverse chemical compositions and unique electronic structures. In recent years, many efforts have been devoted to employing MoS2 as a polysulfide immobilizer and catalyst, functional separator, and Li‐metal protection for Li−S batteries through structural design and electronic modulation. A fundamental understanding of the interplay between structural features, electronic properties, and advanced electrochemical performance is crucial for providing valuable insights for the development of Li−S batteries. In this regard, recent advances in Li−S batteries with 2D MoS2 materials are summarized from the perspective of structural design and electronic modulation. Finally, future prospects and remaining challenges of MoS2 for Li−S batteries are highlighted.

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“…137 It is a good candidate to encapsulate the sulfur. Furthermore, the MoS 2 showed strong interaction with polysulphides, [138][139][140][141] which makes it more attractive for use in Li-S batteries.…”

Section: Mosmentioning

confidence: 99%

Recent development of metal compound applications in lithium–sulphur batteries

Lai

2017

J. Mater. Res.

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Lithium-sulphur (Li-S) batteries are one of the most promising candidates for the next generation of energy storage systems to alleviate the energy crisis. However, Li-S batteries' commercialization faces the challenges of low active materials utilization, poor cycling life, and low energy density. Recently, tremendous progress has been achieved in improving the electrode performances and tap density by using the nanostructured metal compounds in Li-S batteries. In this review, we not only present the latest various nanostructured metal compounds applications in Li-S batteries, including metal oxides, metal sulphides, metal carbides, metal nitrides, and metal organic frameworks, but also we focus on the interaction mechanisms between these polar metal compounds with polysulphides. The issues and bottlenecks of these metal compounds are concluded and the corresponding available solutions to address these issues are proposed. This systematic discussion and proposed strategies can offer avenues to the practical application of Li-S batteries in the near future.

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MoS2-decorated coaxial nanocable carbon aerogel composites as cathode materials for high performance lithium-sulfur batteries

Cited by 59 publications

References 39 publications

Electrocatalysis on Separator Modified by Molybdenum Trioxide Nanobelts for Lithium–Sulfur Batteries

Electrocatalysis on Separator Modified by Molybdenum Trioxide Nanobelts for Lithium–Sulfur Batteries

Two‐Dimensional MoS₂ for Li−S Batteries: Structural Design and Electronic Modulation

Recent development of metal compound applications in lithium–sulphur batteries

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MoS2-decorated coaxial nanocable carbon aerogel composites as cathode materials for high performance lithium-sulfur batteries

Cited by 59 publications

References 39 publications

Electrocatalysis on Separator Modified by Molybdenum Trioxide Nanobelts for Lithium–Sulfur Batteries

Electrocatalysis on Separator Modified by Molybdenum Trioxide Nanobelts for Lithium–Sulfur Batteries

Two‐Dimensional MoS2 for Li−S Batteries: Structural Design and Electronic Modulation

Recent development of metal compound applications in lithium–sulphur batteries

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Two‐Dimensional MoS₂ for Li−S Batteries: Structural Design and Electronic Modulation