Sulfur–Carbon Composite Cathodes

Fang, Ruopian; Chen, Ke; Sun, Ze; Wang, Dawei; Li, Feng

doi:10.1007/978-3-030-90899-7_2

Cited by 3 publications

(2 citation statements)

References 194 publications

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“…Sulfur migration to the MWCNT layer during cycling is observed, emphasizing the importance of the overall robustness. Table S1 presents a comparison to the published LSB cathodes based on CNT. − Some works indicate better peak capacities and/or cycling stability, yet the preparation processes of the cathodes often make use of expensive materials and/or complex synthesis protocols involving the use of strong acids or bases, high temperatures, or other complex procedures, − which present challenges to scale-up and may involve safety concerns. Our cathode preparation is solution-based, expedient, and involves nontoxic and inexpensive materials.…”

Section: Cathode Postfunction Characterizationmentioning

confidence: 99%

Durable Lithium–Sulfur Batteries Based on a Composite Carbon Nanotube Cathode

Yahalom

Snarski

Maity

et al. 2023

ACS Appl. Energy Mater.

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Lithium–sulfur (Li–S) batteries (LSBs) have high energy densities and employ inexpensive materials. However, the poor sulfur conductivity and rapid capacity fading hamper their applications. We developed a free-standing composite cathode based on multi-walled carbon nanotubes (MWCNTs) and single-walled carbon nanotubes (SWCNTs), whose fabrication follows a solution-based, scalable method. The two CNT types create a synergic effect: SWCNTs result in high conductivity, high surface area, and mechanical strength/flexibility; MWCNTs’ larger pores ensure facile ionic diffusion and trapping of lithium polysulfides. The composite cathode exhibits a peak discharge capacity of 1221 mAh/g, maintaining 876 mAh/g after 100 cycles at a 0.1C rate.

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Section: Cathode Postfunction Characterizationmentioning

confidence: 99%

Durable Lithium–Sulfur Batteries Based on a Composite Carbon Nanotube Cathode

Yahalom

Snarski

Maity

et al. 2023

ACS Appl. Energy Mater.

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“…Carbon-sulfur composites can mitigate the issue of poor electrical conductivity of elemental sulfur by providing a conductive network of carbon, which can also act as a buffer to accommodate the volume changes during cycling. [19][20][21] Additionally, the use of carbon-sulfur composites can minimize the dissolution of polysulfide intermediates and improve the overall cycling stability and capacity retention of the battery, through several proposed mechnisms. 20,22,23 While these composites offer several advantages, other difficulties related to the stability of the carbon-sulfur interface have shown to be quite significant, and can lead to the detachment of sulfur particles and loss of active material during cycling.…”

Section: Introductionmentioning

confidence: 99%

Direct Laser-Printing of Molecularly-Dispersed Strongly-Anchored Sulfur-Graphene Layers as High-Performance Cathodes for Polysulfide Shuttle Effect-Inhibited Lithium-Sulfur Batteries

Kothuru,

Cohen,

Daffan

et al. 2024

Preprint

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Sulfur has recently emerged as a promising cathode material for lithium-ion batteries, offering high theoretical capacity and low cost. Its abundant availability and environmentally friendly nature make it an attractive alternative to conventional cathode materials. However, challenges such as sulfur's intrinsically low electrical conductivity and rapid degradation during cycling still need to be overcome for its widespread adoption in commercial batteries. This study presents an innovative, scalable and straightforward strategy to overcome these challenges of sulfur cathodes in lithium battery applications. Here, we present a novel method, using low-power laser irradiation to fabricate three-dimensional highly micro-porous molecularly dispersed and strongly anchored sulfur-graphene composite electrodes. By subjecting sulfur-embedded carbon precursors to laser irradiation, a well-structured graphene composite is formed, while molecularly-entrapping the sulfur moieties within its framework. This 3D porous architecture provides high surface area for improved electrolyte wetting, efficient ion transport, and effectively accommodates volume changes during cycling while strongly entrapping the active sulfur moieties and remarkably inhibiting the occurrence of the detrimental polysulfide shuttle effect. The resulting sulfur-graphene cathodes exhibit exceptional electrochemical properties. They demonstrate remarkable cyclic stability, sustaining over 1500 cycles with impressive capacity retention of >70% at fast cycling rates, and registering over 1000 mAh g-1 at lower rates with >70% retention over 400 cycles. Furthermore, high sulfur loading ratios, compatible to real world battery applications, are readily attainable. The simplicity and versatility of this laser-based writing single-step approach open various new avenues for the scalable and cost-effective production of high-performance lithium-ion batteries. This development brings us closer to realizing efficient energy storage solutions for various applications, from portable electronics to electric vehicles and grid storage systems.

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A comprehensive review of lithium extraction: From historical perspectives to emerging technologies, storage, and environmental considerations

Krishnan,

Gopan

2024

Cleaner Engineering and Technology

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Sulfur–Carbon Composite Cathodes

Cited by 3 publications

References 194 publications

Durable Lithium–Sulfur Batteries Based on a Composite Carbon Nanotube Cathode

Durable Lithium–Sulfur Batteries Based on a Composite Carbon Nanotube Cathode

Direct Laser-Printing of Molecularly-Dispersed Strongly-Anchored Sulfur-Graphene Layers as High-Performance Cathodes for Polysulfide Shuttle Effect-Inhibited Lithium-Sulfur Batteries

A comprehensive review of lithium extraction: From historical perspectives to emerging technologies, storage, and environmental considerations

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