Novel sponge-like N-doped graphene film as high-efficiency electrode for Li-ion battery

Liu, Shilin; Wei, Wei; Wang, Yueyan; Ren, Jing

doi:10.1016/j.apsusc.2019.04.209

Cited by 17 publications

(11 citation statements)

References 19 publications

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“…The high-resolution C 1s spectra of DSHCFs and SSHCFs showed four deconvoluted peaks, corresponding to the C−C (284.8 eV), C−N (285.6 eV), C−O (286.8 eV), and CO (288.8 eV) bonds (Figure S9). 35,36 In addition, the N 1s spectra of DSHCFs and SSHCFs (Figure 2e,f) were fitted into four subpeaks identified at 398.2, 399.8, 400.9, and 403.5 eV, corresponding to pyridinic N, pyrrolic N, graphitic N, and oxidic N. 32 Especially, the incorporation of N could not only facilitate the charge transfer but also lead to strong pseudocapacitive interactions between Li + and the Ncontaining functional groups, both of which are conducive to the improvement of Li + storage performance. 36−39 3.2.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Diffusion Kinetics of Li Ions in Double-Shell Hollow Carbon Fibers

Liu

Lei

Tong

et al. 2021

ACS Appl. Mater. Interfaces

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The rational design and preparation of hierarchical hollow structures have promising potential in electrochemical energy storage systems. In this paper, double-shell hollow carbon fibers (DSHCFs) with tunable thickness and shell spacing are prepared using hollow electrospun polystyrene fibers as the hard template and in situ coated polypyrrole as the carbon source. The as-prepared DSHCFs with an optimized structure exhibit a submicrometer shell spacing and a nanoscaled shell thickness, which guarantees sufficient contact area with the electrolyte and provides abundant electrochemical active sites for Li + storage. Owing to the unique structural advantages, a DSHCF-based anode shows favorable transport kinetics for both Li + ions and electrons during the lithiation/delithiation process, and a high reversible capacity of 348 mAh g −1 at 5.0 A g −1 is well maintained even after 500 cycles with no obvious capacity attenuation. Particular emphasis is given to kinetic Li + storage mechanisms in DSHCFs that are discussed in detail, providing a new avenue for developing high-performance carbon materials for the practical application of energy storage devices.

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Section: Resultsmentioning

confidence: 99%

Enhanced Diffusion Kinetics of Li Ions in Double-Shell Hollow Carbon Fibers

Liu

Lei

Tong

et al. 2021

ACS Appl. Mater. Interfaces

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“…The solution was stirred for another 1 h, and 0.05 g of polyvinyl pyrrolidone (PVP) was added. In the presence of PVP, the melamine and PVDF were better dispersed in the GO solution . After stirring for 0.5 h, the solution was suction-filtered to form a melamine–PVDF–GO film.…”

Section: Experiments Sectionmentioning

confidence: 99%

“…In the presence of PVP, the melamine and PVDF were better dispersed in the GO solution. 32 After stirring for 0.5 h, the solution was suction-filtered to form a melamine−PVDF−GO film. The films were pyrolyzed at 800°C for 2 h with a ramping rate of 5 °C min −1 under a nitrogen atmosphere to obtain a nitrogen−fluorine double-doped reduced GO film (Sample I).…”

Section: Experiments Sectionmentioning

confidence: 99%

Novel Sponge-like Structure of a High-Capacity Nitrogen–Fluorine Codoped Reduced Graphene (N, F-rGO) Film Electrode and Electrochemical Performance in Lithium-Ion Batteries

et al. 2020

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The nitrogen−fluorine-codoped reduced GO film (N, F-rGO film) is prepared by a simple one-step pyrolysis process. The as-prepared N, F-rGO film displays a loose porous structure between layers, and the N-and F-doping contents of the resulting N, F-rGO film were 4 and 1.3%, respectively. As a negative electrode for lithium-ion batteries (LIBs), the as-prepared N, F-rGO film exhibits high reversible capacity and good cycle stability. It delivers an initial discharge capacity of 2133 mA h g −1 and a high reversible specific discharge capacity of 878 mA h g −1 at the current density of 200 mA g −1 . Even at the current density of 2 A g −1 , the reversible specific capacity could be 344 mA h g −1 after 500 cycles. The N, F-double doping and the high-surface area mesoporous structure of rGO provide efficient ionic diffusion path, offering sufficient active sites for lithium-ion storage, resulting in excellent electrochemical performance.

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“…One of the most interesting and effective approaches is nitrogen incorporation. Nitrogen-doped carbons exhibit unique physicochemical and electrochemical properties [ 27 , 28 , 29 , 30 , 31 , 32 ] that are useful in a wide range of practical application [ 33 ]. In general, most carbon precursors have very low nitrogen content.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Carbon Aerogels Derived from Starch Biomass with Improved Electrochemical Properties for Li-Ion Batteries

Kubicka

Bakierska

Chudzik

et al. 2021

IJMS

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Among all advanced anode materials, graphite is regarded as leading and still-unrivaled. However, in the modern world, graphite-based anodes cannot fully satisfy the customers because of its insufficient value of specific capacity. Other limitations are being nonrenewable, restricted natural graphite resources, or harsh conditions required for artificial graphite production. All things considered, many efforts have been made in the investigation of novel carbonaceous materials with desired properties produced from natural, renewable resources via facile, low-cost, and environmentally friendly methods. In this work, we obtained N-doped, starch-based carbon aerogels using melamine and N2 pyrolysis as the source of nitrogen. The materials were characterized by X-ray powder diffraction, elemental analysis, X-ray photoelectron spectroscopy, galvanostatic charge–discharge tests, cyclic voltammetry, and electrochemical impedance spectroscopy. Depending on the doping method and the nitrogen amount, synthesized samples achieved different electrochemical behavior. N-doped, bioderived carbons exhibit far better electrochemical properties in comparison with pristine ones. Materials with the optimal amount of nitrogen (such as MCAGPS-N8.0%—carbon aerogel made from potato starch modified with melamine and CAGPS-N1.2%—carbon aerogel made from potato starch modified by N2 pyrolysis) are also competitive to graphite, especially for high-performance battery applications. N-doping can enhance the efficiency of Li-ion cells mostly by inducing more defects in the carbon matrix, improving the binding ability of Li+ and charge-transfer process.

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Novel sponge-like N-doped graphene film as high-efficiency electrode for Li-ion battery

Cited by 17 publications

References 19 publications

Enhanced Diffusion Kinetics of Li Ions in Double-Shell Hollow Carbon Fibers

Enhanced Diffusion Kinetics of Li Ions in Double-Shell Hollow Carbon Fibers

Novel Sponge-like Structure of a High-Capacity Nitrogen–Fluorine Codoped Reduced Graphene (N, F-rGO) Film Electrode and Electrochemical Performance in Lithium-Ion Batteries

Nitrogen-Doped Carbon Aerogels Derived from Starch Biomass with Improved Electrochemical Properties for Li-Ion Batteries

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