A lightweight nitrogen/oxygen dual-doping carbon nanofiber interlayer with meso-/micropores for high-performance lithium-sulfur batteries

Hu, Fangyuan; Hao, Peng; Zhang, Tianpeng; Shao, Wenlong; Liu, Siyang; Wang, Jinyan; Wang, Chenghao; Jian, Xigao

doi:10.1016/j.jechem.2020.09.032

Cited by 26 publications

(19 citation statements)

References 52 publications

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“…This structural feature may significantly improve the contact between the cathode and the electrolyte and boost ion and electron conductivity. 29,44 Further, the elemental distribution of the electrospun CS-CNF-2/S was studied with STEM analysis. Figure 1d−f shows the elemental mapping of carbon, sulfur, and oxygen elements.…”

Section: Resultsmentioning

confidence: 99%

“…Both carbon and sulfur are distributed homogeneously throughout the nanofiber, which ensures the proper sulfur infusion in the electrospun nanofiber and is beneficial for enhanced kinetics during the redox reaction of sulfur. 29,44 The CS particle distribution in the nanofibers can be observed from the TEM images and is shown in Figure S3a−d, which correspond to CS-CNF-0, CS-CNF-1, CS-CNF-2, and CS-CNF-4, respectively. From the TEM morphological studies, it was evident that CS was present on the surface of the nanofibers, and the CS particle density increased with its loading in the nanofibers.…”

Section: Resultsmentioning

confidence: 99%

“…Figure d–f shows the elemental mapping of carbon, sulfur, and oxygen elements. Both carbon and sulfur are distributed homogeneously throughout the nanofiber, which ensures the proper sulfur infusion in the electrospun nanofiber and is beneficial for enhanced kinetics during the redox reaction of sulfur. , …”

Section: Resultsmentioning

confidence: 99%

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Candle Soot-Embedded Electrospun Carbon Nanofibers as a Flexible and Free-Standing Sulfur Host for High-Performance Lithium–Sulfur Batteries

Cherian,

Kishore,

Reddy

et al. 2023

ACS Appl. Nano Mater.

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Lithium−sulfur batteries (LSBs) have gained considerable attention during the last few decades owing to their high energy density than conventional Li-ion batteries. Apart from the various technical challenges associated with LSBs, there is a need to eliminate the binder, additive, and current collectors used in conventional cell fabrication to enhance the energy density of LSBs. Therefore, this work reports a free-standing flexible cathode matrix synthesized by electrospun nanofiber using candle soot (CS)-incorporated polyacrylonitrile to boost the performance of LSBs. Sulfur is incorporated into a free-standing CS-carbon nanofiber (CS-CNF) mat by a melt diffusion approach. This flexible free-standing architecture provides good mechanical and electrical properties and also assists in suppressing the infamous shuttle effect of polysulfides. Further, its porous network helps to sustain the volume variation arising during electrochemical redox reactions. A detailed electrochemical study reveals that the interconnected nanofiber architecture helps in high sulfur loading and shows excellent rate performance and cyclability. The fabricated LSB with the CS (2 wt %)-CNF/S cathode delivers a high initial discharge capacity of 804 mAh g −1 at 0.5 A g −1 over 200 cycles of the charge−discharge cycle after the rate capability study. Further, the CS (2 wt %)-CNF/S cathode delivers a remarkable specific capacity of 1190 mAh g −1 at 0.1 A g −1 and 865 mAh g −1 after 400 cycles at a high current rate of 1 A g −1 . This study paves an innovative way to synthesize scalable and cost-effective procedures for developing an excellent carbon nanofiber-based free-standing flexible cathode matrix for high-performance LSBs with higher sulfur loading for commercial adoption.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Candle Soot-Embedded Electrospun Carbon Nanofibers as a Flexible and Free-Standing Sulfur Host for High-Performance Lithium–Sulfur Batteries

Cherian,

Kishore,

Reddy

et al. 2023

ACS Appl. Nano Mater.

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“…Moreover, we divided the dual‐doping into two parts ulteriorly. One is a system of two non‐metallic double‐doped atoms, such as N/O, [70,71] N/S, [72,73] and N/P [74] dual‐doped systems, where there is no bond between the two doped atoms. They take advantage of the synergistic effect between different atoms to further inhibit the shuttle effect and have a strong ability of polysulfide adsorption and catalytic conversion.…”

Section: Doping Strategiesmentioning

confidence: 99%

Review of Cathode in Advanced Li−S Batteries: The Effect of Doping Atoms at Micro Levels

et al. 2021

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In recent years, the atom‐doping strategy has attracted extensive attention in lithium‐sulfur batteries. The reasonable structure design and introduction of doping atoms into sulfur cathode materials not only improve the utilization rate of active materials but also catalyze the redox kinetics of polysulfides, which greatly improves the electrochemical performance of the lithium‐sulfur batteries. However, the understanding of the functional mechanism and conversion mechanism of the doping atoms at micro levels is still limited. Hence, it is very crucial to explore the influence of doping atoms on the electronic arrangement and electrochemical active sites. Herein, the development of atomic doping in lithium‐sulfur batteries is reviewed, and the structure‐activity relationship between doped atoms and the adsorption of lithium polysulfide is analyzed. Furthermore, the catalytic mechanisms of catalytic materials were unmasked from microscopic perspectives, namely ion transport, surface electronic structure, energy band structure and state density.

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“…[5][6][7][8] Among the aforementioned challenges, the mitigation of the polysulfide-shuttle has been a long-standing research theme due to its significance in improving the cycling stability of Li-S batteries. [9][10][11][12] To address this issue, developing advanced cathode materials and rational design of cell configuration are both highly desirable. One similar guiding principle has been adapted to different strategies: to retain lithium polysulfides at the cathodic side and to hinder their dissolution in the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Free-standing MoS_x-based dual functional polysulfide catalyzer and immobilizer for high performance Li–S batteries

Yao

Binchao

Wang

et al. 2023

Mater. Chem. Front.

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A lightweight nitrogen/oxygen dual-doping carbon nanofiber interlayer with meso-/micropores for high-performance lithium-sulfur batteries

Cited by 26 publications

References 52 publications

Candle Soot-Embedded Electrospun Carbon Nanofibers as a Flexible and Free-Standing Sulfur Host for High-Performance Lithium–Sulfur Batteries

Candle Soot-Embedded Electrospun Carbon Nanofibers as a Flexible and Free-Standing Sulfur Host for High-Performance Lithium–Sulfur Batteries

Review of Cathode in Advanced Li−S Batteries: The Effect of Doping Atoms at Micro Levels

Free-standing MoS_x-based dual functional polysulfide catalyzer and immobilizer for high performance Li–S batteries

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A lightweight nitrogen/oxygen dual-doping carbon nanofiber interlayer with meso-/micropores for high-performance lithium-sulfur batteries

Cited by 26 publications

References 52 publications

Candle Soot-Embedded Electrospun Carbon Nanofibers as a Flexible and Free-Standing Sulfur Host for High-Performance Lithium–Sulfur Batteries

Candle Soot-Embedded Electrospun Carbon Nanofibers as a Flexible and Free-Standing Sulfur Host for High-Performance Lithium–Sulfur Batteries

Review of Cathode in Advanced Li−S Batteries: The Effect of Doping Atoms at Micro Levels

Free-standing MoSx-based dual functional polysulfide catalyzer and immobilizer for high performance Li–S batteries

Contact Info

Product

Resources

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Free-standing MoS_x-based dual functional polysulfide catalyzer and immobilizer for high performance Li–S batteries