Fabrication of electrospun bilayer separators for lithium-sulfur batteries: A surface and structure dual modification strategy

Xu, Ming; Zhang, Xiaoqing; Yuan, Wei; Huang, Haoliang; Wu, Yaopeng; Wan, Zhenping; Lu, Longsheng; Tang, Yong

doi:10.1007/s11431-022-2194-2

Cited by 1 publication

(2 citation statements)

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“…It is easy to take advantage of the electrospinning process by adding nanoparticles to the electrospinning solution to yield CNFs embedded with the nanoparticles. Xu et al [ 108 ] similarly carbonized PAN NFs to yield CNFs. An electrically insulating layer of PAN NFs was then directly electrospun onto the CNFs, to yield a bilayer.…”

Section: Novel Nanofiber Separatorsmentioning

confidence: 99%

“…The LSB with a BC/SiO 2 separator had better resistance against self-discharging and long-term capacity retention than with a BC separator. Xu et al [ 108 ] modified PAN NFs with SiO 2 nanoparticles via a one-step electrospinning process. The SiO 2 /PAN NF layer was placed facing the Li anode and was combined with a TiO 2 -modified CNF layer facing the cathode.…”

Section: Composite Nanofiber Separatorsmentioning

confidence: 99%

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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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Section: Novel Nanofiber Separatorsmentioning

confidence: 99%

Section: Composite Nanofiber Separatorsmentioning

confidence: 99%