A Novel EDOT/F Co‐doped PMIA Nanofiber Membrane as Separator for High‐Performance Lithium‐Sulfur Battery

Xiang, Hengying; Liu, Xia; Deng, Nanping; Cheng, Bowen; Kang, Weimin

doi:10.1002/asia.202200669

Cited by 6 publications

(3 citation statements)

References 39 publications

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“…Researchers coated flame-retardant materials on separators to enhance the safety of the separator. 128 On one hand, these coatings can block heat from reaching the separator, preventing thermal shrinkage. 129 On the other hand, the flame-retardant groups in the coating can form a protective layer and dilute flammable gases, achieving synergistic flame retardancy in both the gas and condensed phases.…”

Section: Multifunctional Flame-retardant Separators and Interlayersmentioning

confidence: 99%

Advancements in flame-retardant strategies for lithium–sulfur batteries: from mechanisms to materials

Liu,

Yuan,

Chen

et al. 2024

J. Mater. Chem. A

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Section: Multifunctional Flame-retardant Separators and Interlayersmentioning

confidence: 99%

Advancements in flame-retardant strategies for lithium–sulfur batteries: from mechanisms to materials

Liu,

Yuan,

Chen

et al. 2024

J. Mater. Chem. A

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“…One method is to modify PMIA NFs with a fluorinated emulsion. Xiang et al [ 78 ] found that fluorination decreased the electrolyte contact angle from 66⁰ to 23⁰ and increased electrolyte uptake by 12%. The highly polar fluorine groups also reduced pore size by 18% but increased pore volume by 60%, resulting in improved LiPS rejection while maintaining high Li-ion diffusion.…”

Section: Novel Nanofiber Separatorsmentioning

confidence: 99%

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

2023

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Lithium-Sulfur batteries (LSBs) are one of the most promising next-generation batteries to replace Li-ion batteries that power everything from small portable devices to large electric vehicles. LSBs boast a nearly five times higher theoretical capacity than Li-ion batteries due to sulfur’s high theoretical capacity, and LSBs use abundant sulfur instead of rare metals as their cathodes. In order to make LSBs commercially viable, an LSB’s separator must permit fast Li-ion diffusion while suppressing the migration of soluble lithium polysulfides (LiPSs). Polyolefin separators (commonly used in Li-ion batteries) fail to block LiPSs, have low thermal stability, poor mechanical strength, and weak electrolyte affinity. Novel nanofiber (NF) separators address the aforementioned shortcomings of polyolefin separators with intrinsically superior properties. Moreover, NF separators can easily be produced in large volumes, fine-tuned via facile electrospinning techniques, and modified with various additives. This review discusses the design principles and performance of LSBs with exemplary NF separators. The benefits of using various polymers and the effects of different polymer modifications are analyzed. We also discuss the conversion of polymer NFs into carbon NFs (CNFs) and their effects on rate capability and thermal stability. Finally, common and promising modifiers for NF separators, including carbon, metal oxide, and metal-organic framework (MOF), are examined. We highlight the underlying properties of the composite NF separators that enhance the capacity, cyclability, and resilience of LSBs.

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“…Modification of the separator is a simple and effective method to inhibit the "shuttle effect". Therefore, more and more researchers have paid much more attention to modifying the separator in Li-S batteries to inhibit lithium polysulfide shuttling to the negative electrode [15] . HY Xiang et al prepared a nanofiber membrane 3, 4-ethylene dioxyethiophene/ F co-doped poly-m-phenyleneisophthalamide (EDOT-5/F-PMIA) by electrospinning technology [16] .…”

Section: Introductionmentioning

confidence: 99%

C60 and ZIF-67 synergistically modified gelatin-based nanofibrous separators for Li-S batteries

Liang¹,

Zhao²,

Wang³

et al. 2023

Energy Mater

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The lithium-sulfur (Li-S) battery has been attracting much more attention in recent years due to its high theoretical capacity and low cost, although various issues, such as the “shuttle effect” and the low use ratio of active materials, have been hindering the development and application of Li-S batteries. The separator is an important part of Li-S batteries, and its modification is a simple and effective strategy to improve the electrochemical performance of Li-S batteries. In this work, we explore separators with different functions on their two sides that have been produced by a step-by-step electrospinning method. The multifunctional separator on one side is pure gelatin, and the other side is zeolitic imidazolate framework-67 (ZIF-67)-C60-gelatin. The ZIF-67-C60-gelatin layer on the cathode side is of great importance. The chemisorption sites on it are provided by ZIF-67, and the transformation sites of lithium polysulfide are provided by C60. Gelatin, which is on the anode side, as an admirable separator material, makes the lithium flux uniform and thus prevents the generation of lithium dendrites. This type of multifunctional nanofiber separator based on double gelatin layers plays an important role in the adsorption and conversion of polysulfides, and it improves the overall performance of the Li-S battery. As a result, the Li-S batteries assembled with the prepared separator can still maintain the capacity of 888 mAh g-1 after 100 cycles at 0.2 C, and the capacity retention rate of the Li-S batteries is 72.9% after 400 cycles at 2 C. This simple preparation method and high-performance bilayer membrane structure provide a new route for commercial application.

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A Novel EDOT/F Co‐doped PMIA Nanofiber Membrane as Separator for High‐Performance Lithium‐Sulfur Battery

Cited by 6 publications

References 39 publications

Advancements in flame-retardant strategies for lithium–sulfur batteries: from mechanisms to materials

Advancements in flame-retardant strategies for lithium–sulfur batteries: from mechanisms to materials

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

C60 and ZIF-67 synergistically modified gelatin-based nanofibrous separators for Li-S batteries

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