Hierarchical multi-component nanofiber separators for lithium polysulfide capture in lithium–sulfur batteries: an experimental and molecular modeling study

Zhu, Jiadeng; Yıldırım, Erol; Aly, Karim; Shen, Jialong; Chen, Chen; Lü, Yao; Jiang, Mengjin; Kim, David; Tonelli, Alan E.; Pasquinelli, Melissa A.; Bradford, Philip D.; Zhang, Xiangwu

doi:10.1039/c6ta04577d

Cited by 76 publications

(25 citation statements)

References 43 publications

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“…As shown in some studies, the introduction of a functional layer between the cathode and anode increased the consumption of electrolyte by forming an solid‐electrolyte interface layer and/or wetting the additional surface of the functional layer, resulting in an increase in the electrolyte use. A recent study reported that the incorporation of functional layers of PAN and SiO 2 increased the uptake of the electrolyte to 330% . The specific electrolyte loadings in recent studies were 40, 50, 60, 80, and 100 µL mg −1 , respectively .…”

Section: Perspectives For Functional Interlayers/separators Of Li–s Bmentioning

confidence: 99%

“…The heteroatom and functional groups on carbon materials showed insufficient interactions with the polysulfide species below 2 eV . On the other hand, SiO 2 interacts with polysulfide species, ranging from above ≈2 eV to ≈3 eV . The interaction energies of MoS 2 with polysulfide species are ≈3–5 eV, making it a good candidate for a PS‐anchoring material .…”

Section: Ps‐functionsmentioning

confidence: 99%

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Rational Design of Nanostructured Functional Interlayer/Separator for Advanced Li–S Batteries

Jeong

Kim

Nam

et al. 2018

Adv Funct Materials

313

197

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The lithium-sulfur (Li-S) battery is considered as a promising future energy storage device owing to its high theoretical energy density, low cost of the raw active material (sulfur), and its environmental friendliness. On the other hand, there are still challenging issues for the practical applications of Li-S batteries, including low sulfur utilization, poor cyclability, and rate capability. Although considerable efforts are made to overcome the current obstacles in Li-S batteries, one is still far from meeting the requirements for the commercialization of Li-S batteries. This review outlines the recent progress in Li-S batteries based on novel configurations, such as incorporating functional interlayers/separators beyond the approach for preparing novel cathodes, and discusses the role of the configuration in Li-S batteries. The functions of the newly introduced functional interlayer/separator are highlighted to address the problems of Li-S batteries. From classification of the functions, the perspectives and outlook are presented to rationally design a novel functional interlayer/separator for high-performance Li-S batteries.

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Section: Perspectives For Functional Interlayers/separators Of Li–s Bmentioning

confidence: 99%

Section: Ps‐functionsmentioning

confidence: 99%

Rational Design of Nanostructured Functional Interlayer/Separator for Advanced Li–S Batteries

Jeong

Kim

Nam

et al. 2018

Adv Funct Materials

313

197

View full text Add to dashboard Cite

show abstract

“…The batteries incorporating this PEDOT/PPS modified separator exhibit a discharge capacity of 985 mAh g −1 with a capacity decay rate of 0.0364% per cycle during 1000 cycles at 0.25 C , superior to those with commercial separators (981 mAh g −1 , 0.0932%). Zhu et al prepared a polyacrylonitrile‐silica/MWCNT separator via electrospinning. In this separator, CN and SiO 2 trap the polysulfide through chemical interaction and MWCNT provides electrons for the polysulfide reduction reaction.…”

Section: Separators To Restrain Polysulfide Shuttle Effectmentioning

confidence: 99%

Mechanistic understanding of the role separators playing in advanced lithium‐sulfur batteries

Wei

Ren

Sokolowski

et al. 2020

InfoMat

255

147

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The lithium-sulfur battery is considered one of the most promising candidates for portable energy storage devices due to its low cost and high energy density.However, many critical issues, including polysulfide shuttling, self-discharge, lithium dendritic growth, and thermal hazards need to be addressed before the commercialization of lithium-sulfur batteries. To this end, tremendous efforts have been made to explore battery configurations and components, such as electrodes, electrolytes, and separators, among which the separator plays an especially critical role in addressing aforementioned issues. Thus, this review analyzes the mechanisms and interactions of these critical issues and summarizes both the function of separators and recent progress made towards remedying such issues. Additionally, promising directions for the development of separators in lithium-sulfur batteries are proposed. K E Y W O R D Slithium dendrite, lithium-sulfur batteries, self-discharge, separator, shuttle effect, thermal hazardsThe first two authors contributed equally to this work.

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“…The most commonly used inorganic nanoparticles are SiO 2 , TiO 2 , zinc oxide (ZnO), calcium carbonate (CaCO 3 ), etc. The Zhu's research team prepared a multifunctional PAN/SiO 2 nanofiber membrane with an integral ultralight and thin multiwalled CNT sheet, which was beneficial for the fleet diffusion of both Li‐ions and electrons and inhibition of the diffusion of polysulfides. A superior capacity retention of 741 mAh g −1 at 0.2 C after 100 cycles with excellent performance was obtained even with a large S content of 70 wt%.…”

Section: Separatormentioning

confidence: 99%

A Review: Electrospun Nanofiber Materials for Lithium‐Sulfur Batteries

Liu

Deng

et al. 2019

Adv Funct Materials

166

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Lithium-sulfur (Li-S) batteries are in the spotlight because their outstanding theoretical specific energy is much higher than those of the commercial lithium ion (Li-ion) batteries. Li-S batteries are tough competitors for futuredeveloping energy storage in the fields of portable electronics and electric vehicles. However, the severe "shuttle effect" of the polysulfides and the serious damage of lithium dendrites are main factors blocking commercial production of Li-S batteries. Owing to their superior nanostructure, electrospun nanofiber materials commonly show some unique characteristics that can simultaneously resolve these issues. So far, various novel cathodes, separators, and interlayers of electrospun nanofiber materials which are applied to resolve these challenges are researched. This review presents the fundamental research and technological development of multifarious electrospun nanofiber materials for Li-S cells, including their processing methods, structures, morphology engineering, and electrochemical performance. Not only does the review article contain a summary of electrospun nanofiber materials in Li-S batteries but also a proposal for designing electrospun nanofiber materials for Li-S cells. These systematic discussions and proposed directions can enlighten thoughts and offer ways in the reasonable design of electrospun nanofiber materials for excellent Li-S batteries in the near future.or conducting coagulation bath) is placed against the capillary. A thin polymer fiber membrane is deposited on the collector. The electrospun nanofibers have big potential for developing the outstanding energy storage systems due to their high surface area and excellent surface-to-volume ratio which can offer numerous active sites and controllable porous structure to buffer the huge volume changes during battery cycling and infiltrate the electrolyte. [18] Electrospun nanofiber membranes possess high porosity, large specific surface area, and controllable pore size, which will block "shuttle effect" of polysulfides and enhance the wettability for electrolytes. [19] Electrospinning technique and carbonization process are facile to manufacture freestanding nanofiber fabrics with controllable porous architecture and outstanding electrical conductivity. Electrospun porous nanofibers can come into a reservoir-like matrix for the reserve of active materials. First, the hierarchical pores in electrospun porous nanofibers can improve the reactive S reaction sites and block soluble polysulfides, thereby decreasing the "shuttling effect" of polysulfides during the electrochemical cycling. Second, electrospun porous fibers have excellent physical and mechanical properties, outstanding architecture, and superior electrical conductivity, which can enhance the transfer of Li-ions and electrons, endowing extraordinary electrochemical performance of the whole battery system. [20] Figure 2 shows phase and morphological evolutions of the electrospun nanofibers. By combining the electrospinning and other treatment (thermal, chem...

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Hierarchical multi-component nanofiber separators for lithium polysulfide capture in lithium–sulfur batteries: an experimental and molecular modeling study

Abstract: A multi-functional nanofiber membrane significantly improves the overall performance of Li–S batteries.

Cited by 76 publications

References 43 publications

Rational Design of Nanostructured Functional Interlayer/Separator for Advanced Li–S Batteries

Rational Design of Nanostructured Functional Interlayer/Separator for Advanced Li–S Batteries

Mechanistic understanding of the role separators playing in advanced lithium‐sulfur batteries

A Review: Electrospun Nanofiber Materials for Lithium‐Sulfur Batteries

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