Separator modified with N,S co-doped mesoporous carbon using egg shell as template for high performance lithium-sulfur batteries

Yuan, Xiqing; Wu, Longsheng; He, Xiulin; Zeinu, Kemal; Huang, Long; Zhu, Xiaolei; Hou, Huijie; Liu, Bingchuan; Hu, Jingping; Yang, Jiakuan

doi:10.1016/j.cej.2017.03.022

Cited by 112 publications

(40 citation statements)

References 59 publications

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“…S3a and S3b, respectively. The two cathodic peaks at 2.31 V and 2.08 V are respectively correspond to the conversion from S 8 to soluble long-chainpolysulfides (Li 2 S x , 4 ≤ x < 8) and further reduction to low order Li 2 S and Li 2 S 2 [9]. One anodic peak near 2.46 V which is associated with the oxidation from Li 2 S and Li 2 S 2 to Li 2 S 8 [7].…”

Section: Resultsmentioning

confidence: 98%

“…High conductivity, appropriate porosity and high mechanical strength are essential for nanostructured sulfur host materials [7]. Various carbon materials, for instance microporous carbon [8], mesoporous carbon [9], hierarchical porous materials [10], carbon nanotubes [11,12] and carbon fibers [13], have been used as host materials of sulfur in Li-S batteries. However, the weak interaction between polar lithium polysulfides and non-polar porous carbon materials could still results in severe shuttle effect, e.g., the irreversible loss of lithium polysulfides from electrodes and therefore significant decay of Li-S battery over long-term cycling [14].…”

Section: Introductionmentioning

confidence: 99%

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Supercritical CO2-assisted fabrication of CeO2 decorated porous carbon/sulfur composites for high-performance lithium sulfur batteries

Zhu

Zhao

2019

SN Appl. Sci.

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Alleviating shuttle effect is vital to improve the electrochemical performance of lithium-sulfur (Li-S) batteries. Herein a nanosheet-like porous carbon (NSPC) with unique hierarchically porous structure and excellent electrical conductivity was synthesized as a host material of cathode, and highly-dispersed, electrochemically active CeO 2 nanoparticles as well as sulfur was deposited onto NSPC subsequently through supercritical CO 2-assisted processing to fabrticate CeO 2 decorated porous carbon/sulfur (C/CeO 2 /S) composites. In testing Li-S batteries, the C/CeO 2 /S material shows an initial capacity of 1538 mAh g −1 at 0.1 C, higher than that of C/S (1194 mAh g −1). The material also exhibits excellent cycling stability (~ 729 mAh g −1 at 0.5 C after 300 cycles). The gas-like viscosity, diffusivity and surface tension of supercritical CO 2 , facilitate highly dispersed loading of CeO 2 and sulfur on porous carbon with less agglomeration and more intimate contact with carbon to achieve higher conductivity and utilization efficiency. Moreover the electrocatalytic material CeO 2 promotes and stabilizes the redox reaction of polysulfide species.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Supercritical CO2-assisted fabrication of CeO2 decorated porous carbon/sulfur composites for high-performance lithium sulfur batteries

Zhu

Zhao

2019

SN Appl. Sci.

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“…Doping heteroatoms into carbons can create a nonuniform electron distribution on the carbon surface, therefore generate chemical adsorption sites for polysulfides and enhance the carbon‐polysulfide interactions . For example, nitrogen doping can improve the trapping effect of carbon‐based materials: pyridinic‐N and pyrrolic‐N enhance the polysulfides adsorption capacity while graphitic‐N improves the electronic conductivity of the trapping layer .…”

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

242

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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“…Due to this heteroatom‐doped micro‐/mesoporous carbon framework, there was a substantial improvement in the electrochemical performance in terms of cycling stability (Table ), capacity retention, and rate capability. To achieve efficient and working Li‐S batteries, another nitrogen and sulfur co‐doped porous carbon material was obtained from eggshell as starting material by Yuan et al…”

Section: A Summary Of Recent Literature On Li‐s Battery Separators CLmentioning

confidence: 99%

Separator Membranes for Lithium–Sulfur Batteries: Design Principles, Structure, and Performance

Gupta

Sivaram

2019

Energy Tech

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Improvement in electrical energy storage systems is one of the most recent research topics of great academic and industrial interest. Lithium‐sulfur (Li‐S) battery systems offer a theoretical energy density an order of magnitude larger than the popular Li‐ion batteries. The principle of working, inherent challenges in utilizing this system for commercial applications, and the various approaches taken to address these challenges are herein discussed in detail. The polysulfide shuttle effect is a major concern that deteriorates electrochemical performance in this system. In the recent past, electrodes have been intricately engineered to tackle this problem. However, more recently, the focus has shifted to the critical role of the separator. Modifying conventional separators or fabricating novel structures to enhance the cell performance appears to be a more feasible option. Some design principles that are critical to the functioning of a separator in Li‐S batteries, namely physisorption, chemisorption, and electrostatic repulsion, are discussed. Many recent papers proposed novel cell configurations with specifically designed functional separators. These reports are classified according to three design principles, analyzed critically, and compared with a view to assess their relative merits and efficacy. Some thoughts on the future directions in the development of an efficient separator are described.

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Separator modified with N,S co-doped mesoporous carbon using egg shell as template for high performance lithium-sulfur batteries

Cited by 112 publications

References 59 publications

Supercritical CO2-assisted fabrication of CeO2 decorated porous carbon/sulfur composites for high-performance lithium sulfur batteries

Supercritical CO2-assisted fabrication of CeO2 decorated porous carbon/sulfur composites for high-performance lithium sulfur batteries

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

Separator Membranes for Lithium–Sulfur Batteries: Design Principles, Structure, and Performance

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