Nitrogen and oxygen dual-doped porous carbon derived from natural ficus microcarpas as host for high performance lithium-sulfur batteries

Feng, Huagui; Zhang, Miao; Kang, Jinwei; Su, Qingmei; Du, Gaohui; Xu, Bingshe

doi:10.1016/j.materresbull.2019.01.015

Cited by 28 publications

(8 citation statements)

References 40 publications

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“…This further demonstrates that the CAK is made of two elements of carbon and oxygen. In the high-resolution spectrum of C 1s, three peaks centered at 284.6, 285.5, and 287.5 eV are fitted to the experimental spectrum, vesting in C–C/CC, C–O, and CO bonds, respectively. , Figure f exhibits the deconvoluted O 1s peaks of the CAK at 532.4 and 533.3 eV. The one peak at 532.4 eV is assigned to the C–O bonds, the other peak at 533.3 eV is attributed to the CO bonds.…”

Section: Resultsmentioning

confidence: 96%

“…In addition, the distribution of C and S elements on the surface of the GPIL is the same, suggesting that there is elemental sulfur absorbed onto the surface of the GPIL. N and O elements derived from polypyrrole and the CAK material play an important role in the chemical adsorption of LiPSs. , Moreover, it is reported that not all of the Li 2 S 2 and Li 2 S is converted to sulfur . Accordingly, the material precipitating on the surface of a GPIL is translated into sulfur and LiPSs.…”

Section: Resultsmentioning

confidence: 99%

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Constructing a Multifunctional Globular Polypyrrole Slurry Cladding Carbon Aerogel/Sulfur Cathode for High-Performance Lithium–Sulfur Batteries

et al. 2020

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Lithium–sulfur (Li–S) batteries with their low cost, high energy density, and theoretical specific capacity have been deemed as one of the most promising candidates for the future energy storage market. However, the insulating sulfur and the shuttling effect concerning lithium polysulfides always persecute the sulfur cathode of Li–S batteries. Consequently, a globular polypyrrole (PPy) interlayer (GPIL) with multifunctional polysulfide-blocking ability wraps the carbon aerogel/sulfur cathode to restrain this shuttling effect. Ultimately, a high-performance Li–S battery is obtained through a polypyrrole coating design. The maximum discharge specific capacity of the sulfur cathode with a GPIL is 882 mAh g–1 at 1.4 mA cm–2 with the reversible specific capacity and an average Coulombic efficiency of ∼652.7 mAh g–1 and 98.1%, respectively, after 100 cycles, indicating an effective impediment of the shuttling effect. Moreover, the Li–S battery with a GPIL can still deliver 520 mAh g–1 with a capacity retention rate of >96% after 100 cycles at a high current density of 2.8 mA cm–2, significantly outstripping most of the interlayers recently reported. This work highlights the meaning of this multifunctional interlayer and also promotes the great application potential of carbon aerogel as the host of the sulfur cathode for Li–S batteries.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Constructing a Multifunctional Globular Polypyrrole Slurry Cladding Carbon Aerogel/Sulfur Cathode for High-Performance Lithium–Sulfur Batteries

et al. 2020

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“…Figure d–f show the HR-XPS spectra of O 1s with typical functional groups −CO, C–O–C, and −C–O at 531.6, 532.5, and 533.6 eV. , A part of the O-containing functional group is introduced along with the doping of N atoms such that the weak electrochemical attraction between sulfur and oxygen also stabilizes the active polysulfide lithium during charging and discharging . The specific values of O-dopant configurations are also shown in Table .…”

Section: Results and Discussionmentioning

confidence: 99%

A Nitrogen-Doped Carbon Matrix Aiming at Inhibiting Polysulfide Shuttling for Lithium–Sulfur Batteries

et al. 2020

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Lithium−sulfur (Li−S) batteries have been attracting great attention as promising rechargeable batteries because of their large specific capacity and high energy density. However, some technical problems still limit the commercialization value of Li− S batteries such as poor electrical conductivity, shuttle effects, and volume expansion. To overcome the aforementioned issues, Ndoped carbon composites were synthesized via a one-step hydrothermal method. To obtain different N-doping configurations, a carbon precursor was annealed at different heating rates, resulting in different N-containing properties. The cell with the most content of pyridinic-N delivered the highest initial discharge capacity of ∼1121 mAh g −1 , and the specific capacity still retained 605 mAh g −1 at 200 mA g −1 after 100 cycles. It was concluded that pyridinic-N has the most significant effect on immobilizing the soluble lithium polysulfides, which stabilized the cycle of Li−S batteries.

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“…This further proves that the S/PHCA@PPy composite is made of four elements of sulfur, carbon, nitrogen, and oxygen. In the high-resolution spectrum of C 1s, four peaks centered at 284.6, 285.7, 287.9, and 288.6 eV − are fitted the experimental spectrum, vesting in C−C/C−H/CC, C−N/−C−O, CO, and O−CO bonds, respectively. Figure b exhibits the deconvoluted O 1s peaks of the S/PHCA@PPy composite at 531.6 and 533.2 eV.…”

Section: Resultsmentioning

confidence: 99%

Porous Hollow Carbon Aerogel-Assembled Core@Polypyrrole Nanoparticle Shell as an Efficient Sulfur Host through a Tunable Molecular Self-Assembly Method for Rechargeable Lithium/Sulfur Batteries

Gao

Huang

Zhang

et al. 2020

ACS Sustainable Chem. Eng.

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Lithium−sulfur (Li−S) batteries are fascinating as next-generation high specific energy density storation devices. Herein, we report the fabrication of a three-dimensional porous hollow core@shell structure composed of a carbon aerogel assembled core etched via nano-CaCO 3 and a polypyrrole nanoparticle shell as a sulfur scaffold for Li−S batteries. The asprepared sulfur cathodes exhibit excellent reversible capacity (1031.9 mAh g −1 at 0.1 C), outstanding rate capability (566.5 and 477.2 mAh g −1 at 1 and 2 C, respectively), and superior cycling stability (74.2% capacity retention rate at 1 C). The improved electrochemical performance can be attributed to the extraordinary core−shell structure: the honeycomb-like carbon aerogel core provides fast transportation for the Li + /e − , and even sufficient free space for the volume expansion; the polypyrrole nanoparticle shell acts not only as a physical obstacle but also as a polar material to restrict the shuttling of polysulfides by chemical interaction. These inspiring results specify that such electrodes could empower high performance, fast charging, and flexible Li−S batteries through a tunable molecular self-assembly method to clad strong polar material on carbon materials.

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Nitrogen and oxygen dual-doped porous carbon derived from natural ficus microcarpas as host for high performance lithium-sulfur batteries

Cited by 28 publications

References 40 publications

Constructing a Multifunctional Globular Polypyrrole Slurry Cladding Carbon Aerogel/Sulfur Cathode for High-Performance Lithium–Sulfur Batteries

Constructing a Multifunctional Globular Polypyrrole Slurry Cladding Carbon Aerogel/Sulfur Cathode for High-Performance Lithium–Sulfur Batteries

A Nitrogen-Doped Carbon Matrix Aiming at Inhibiting Polysulfide Shuttling for Lithium–Sulfur Batteries

Porous Hollow Carbon Aerogel-Assembled Core@Polypyrrole Nanoparticle Shell as an Efficient Sulfur Host through a Tunable Molecular Self-Assembly Method for Rechargeable Lithium/Sulfur Batteries

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