Synergistic constraint and conversion of lithium polysulfide using a 3D hollow carbon interlayer in ultrahigh sulfur content Li-S batteries

Lei, Dongyuan; Li, Jinkui; Xiang, Mingwu; Zhao, Zongbin; Yang, Shixun; Hu, Zhe; Yuan, Mingwei; Guo, Junming; Yi, Xin; Bai, Wei

doi:10.1016/j.apsusc.2023.157080

Cited by 7 publications

(2 citation statements)

References 60 publications

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“…The first major cause of weightlessness is the evaporation of water molecules at around 50–100 °C. Between 150 and 350 °C, the weight of the composite decreases rapidly in the second phase due to the swift sublimation of sulfur . The sulfur content of ZnSe/CoSe 2 –CNT-S- x ( x = 1, 2, 3, 4, 5) composites was determined by TGA to be 69.95, 69.66, 69.32, 68.25, and 68.10 wt %, respectively.…”

Section: Resultsmentioning

confidence: 99%

Carbon Nanotube Modified Zn–Co Bimetallic Selenide Composites for Lithium–Sulfur Batteries

Cai,

Pan,

Zhang

et al. 2024

Energy Fuels

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The cathode material of the lithium−sulfur (Li−S) battery poses several challenges, including inadequate conductivity, the "shuttle effect", and volume expansion, all contributing to its reduced cycle lifespan. To address these issues, high-performance Li−S batteries can be manufactured by using transition metal selenide nanomaterials. These nanomaterials exhibit polarity, porosity, electrochemical catalytic activity, and high conductivity, making them well-suited hosts for sulfur cathodes. In this study, a metal−organic framework material was employed as a precursor to produce hollow dodecahedral transition metal selenides. This involved combining the precursor with selenium powder and subjecting it to high-temperature calcination. By leveraging bimetallic synergism and incorporating carbon nanotubes, the material's conductivity was improved, providing a conductive pathway for electron transport. The hollow ZnSe/CoSe 2 structure's surface is interconnected by carbon nanotubes, forming a conductive network. This arrangement facilitates efficient sulfur utilization and prevents structural collapse during battery cycling. Moreover, ZnSe/CoSe 2 enhances the chemical anchoring of polysulfide, promotes polysulfide transformation, and induces homogeneous nucleation of Li 2 S. Experimental results demonstrate excellent electrochemical performance when 50 mg of carbon nanotubes. At a rate of 0.05 C, the initial discharge specific capacity reaches 1225.75 mA h•g −1 , while at 1 C, it is 439.35 mA h•g −1 . After 200 cycles, the battery exhibits a capacity retention of 71.25% with a reversible capacity of 313.08 mA h•g −1 .

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Section: Resultsmentioning

confidence: 99%

Carbon Nanotube Modified Zn–Co Bimetallic Selenide Composites for Lithium–Sulfur Batteries

Cai,

Pan,

Zhang

et al. 2024

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…The modified LSBs (sulfur content of 95 wt%) offer the relatively high initial discharge capacity of 692 mA h g −1 , and a capacity retention of 96% is also achieved at 0.2C after 200 cycles. 300…”

Section: The Interfacial Issues and Corresponding Solutions In Practi...mentioning

confidence: 99%

Interface engineering toward stable lithium–sulfur batteries

Guo,

Niu,

Pei

et al. 2024

Energy Environ. Sci.

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MoP nanoparticles encapsulated in N-doped carbon nanotubes as sulfur host for advanced lithium-sulfur batteries

Wu,

Li,

Chen

et al. 2023

Nano Res.

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Synergistic constraint and conversion of lithium polysulfide using a 3D hollow carbon interlayer in ultrahigh sulfur content Li-S batteries

Cited by 7 publications

References 60 publications

Carbon Nanotube Modified Zn–Co Bimetallic Selenide Composites for Lithium–Sulfur Batteries

Carbon Nanotube Modified Zn–Co Bimetallic Selenide Composites for Lithium–Sulfur Batteries

Interface engineering toward stable lithium–sulfur batteries

MoP nanoparticles encapsulated in N-doped carbon nanotubes as sulfur host for advanced lithium-sulfur batteries

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