One-pot fabrication of nitrogen and sulfur dual-doped graphene/sulfur cathode via microwave assisted method for long cycle-life lithium-sulfur batteries

Chen, Dan; Yang, Rong; Chen, Liping; Zou, Yiming; Ren, Bing; Li, Lan; Li, Sichen; Yan, Yinglin; Xu, Yunhua

doi:10.1016/j.jallcom.2018.02.279

Cited by 25 publications

(12 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lithium–sulfur batteries(Li–S) have a great potential to become the next‐generation power source for electric vehicles, mobile phones, computers, and smart grid community systems, due to its high operating voltages, high power density (2600 mA h kg −1 ), low self‐discharge, and high energy capacity (1672 mA h g −1 ) . Nitrogen‐ and sulfur‐doped graphene could improve both electrical conductivity and the capture of soluble polysulfide . Moreover, the enhanced interface adsorption of the heteroatom (nitrogen and sulfur)‐doped porous carbon/graphene could suppress diffusion of polysulfide into the electrolyte and thus could shorten the transport pathway for both ions and electrons, which would benefit the battery life and charging time …”

Section: Resultsmentioning

confidence: 99%

Laser Direct Writing of Heteroatom (N and S)‐Doped Graphene from a Polybenzimidazole Ink Donor on Polyethylene Terephthalate Polymer and Glass Substrates

Huang

Zeng

Liu

et al. 2018

Small

View full text Add to dashboard Cite

In this paper, for the first time, a laser direct writing technique is reported to form S‐ and N‐doped graphene patterns on thin (0.3 mm thickness) polyethylene terephthalate (PET) and glass substrates from a specially formulated organic polybenzimidazole (PBI) ink, without thermally affecting the substrates and without the need for a metallic precursor. Unlike standard graphene ink printing, postcuring at high temperatures is not needed here, thus avoiding potential substrate distortion and damages. A UV laser beam of 355 nm wavelength is used to generate photochemical reactions to break the CS bond (2.8 eV) from dimethyl sulfoxide (DMSO, a component of the PBI ink) and the CN bond (3.14 eV) of PBI and form N‐ and S‐doped graphene on the substrates. The sheet resistance of the laser‐induced graphene is as low as 12 Ω sq−1 on PET, matching that of indium–tin oxide (ITO). The laser‐written doped graphene shows hydrophilic characteristics, unlike pristine graphene. The S‐ and N‐doped graphene allows the tailoring of bandgaps and thus controlling electrical and chemical properties. The optical transparency of the written graphene is below 10% which could be improved in the future. Potential applications include printing of flexible circuits and sensors, and smart wearables.

show abstract

Section: Resultsmentioning

confidence: 99%

Laser Direct Writing of Heteroatom (N and S)‐Doped Graphene from a Polybenzimidazole Ink Donor on Polyethylene Terephthalate Polymer and Glass Substrates

Huang

Zeng

Liu

et al. 2018

Small

View full text Add to dashboard Cite

show abstract

“…Among these materials, reduced graphene oxide (RGO) (which is a carbon material) has high surface area, excellent intrinsic conductivity, excellent mechanical flexibility, and chemical stability. Due to these excellent properties, RGO has been widely used to prepare S/RGO composites to mitigate the dissolution of intermediate polysulfides [ 16 , 17 ]. However, the physical interactions between nonpolar RGO and polar polysulfides are weak, and they cannot ensure the long-term confinement of polysulfides during the charging/discharging process, during which the polysulfides remain vulnerable to slow dissolution in electrolytes, thus triggering the “shuttle effect” and resulting in an unsatisfactory calendar life [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional S/CeO2/RGO Composites as Cathode Materials for Lithium–Sulfur Batteries

et al. 2018

View full text Add to dashboard Cite

In this paper, the synthesis of the three-dimensional (3D) composite of spherical reduced graphene oxide (RGO) with uniformly distributed CeO2 particles is reported. This synthesis is done via a facile and large-scalable spray-drying process, and the CeO2/RGO materials are hydrothermally compounded with sulfur. The morphology, composition, structure, and electrochemical properties of the 3D S/CeO2/RGO composite are studied using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), Raman spectra and X-ray photoelectron spectroscopy (XPS), etc. The electrochemical performance of the composites as electrodes for lithium–sulfur batteries is evaluated. The S/CeO2/RGO composites deliver a high initial capacity of 1054 mAh g−1, and retain a reversible capacity of 792 mAh g−1 after 200 cycles at 0.1 C. Profiting from the combined effect of CeO2 and RGO, the CeO2/RGO materials effectively inhibit the dissolution of polysulfides, and the coating of spherical RGO improves the structural stability as well as conductivity.

show abstract

“…The LiPSs generated during the charging/discharging process are inhibited by the active regions on the surface of the material. The sulfur atoms and polysulfides form new sulfate groups that can act as new polysulfides and provide additional capacity [ 60 , 61 , 71 , 85 ].…”

Section: Heteroatom Doped Graphenementioning

confidence: 99%

“…Based on the above chemical theoretical study of N/S co-doped graphene, researchers have co-doped N and S atoms into carbon-based materials such as graphene sponge, graphene nanosheets, and multilayer graphene [ 60 , 61 , 62 , 63 , 86 ]. The graphene sponge designed by Zhou has a 3D interconnected network structure with rich pores up to 2–8 μm in size [ 61 ].…”

Section: Heteroatom Doped Graphenementioning

confidence: 99%

Graphene-Based Nanomaterials as the Cathode for Lithium-Sulfur Batteries

2021

View full text Add to dashboard Cite

The global energy crisis and environmental problems are becoming increasingly serious. It is now urgent to vigorously develop an efficient energy storage system. Lithium-sulfur batteries (LSBs) are considered to be one of the most promising candidates for next-generation energy storage systems due to their high energy density. Sulfur is abundant on Earth, low-cost, and environmentally friendly, which is consistent with the characteristics of new clean energy. Although LSBs possess numerous advantages, they still suffer from numerous problems such as the dissolution and diffusion of sulfur intermediate products during the discharge process, the expansion of the electrode volume, and so on, which severely limit their further development. Graphene is a two-dimensional crystal material with a single atomic layer thickness and honeycomb bonding structure formed by sp2 hybridization of carbon atoms. Since its discovery in 2004, graphene has attracted worldwide attention due to its excellent physical and chemical properties. Herein, this review summarizes the latest developments in graphene frameworks, heteroatom-modified graphene, and graphene composite frameworks in sulfur cathodes. Moreover, the challenges and future development of graphene-based sulfur cathodes are also discussed.

show abstract

One-pot fabrication of nitrogen and sulfur dual-doped graphene/sulfur cathode via microwave assisted method for long cycle-life lithium-sulfur batteries

Cited by 25 publications

References 56 publications

Laser Direct Writing of Heteroatom (N and S)‐Doped Graphene from a Polybenzimidazole Ink Donor on Polyethylene Terephthalate Polymer and Glass Substrates

Laser Direct Writing of Heteroatom (N and S)‐Doped Graphene from a Polybenzimidazole Ink Donor on Polyethylene Terephthalate Polymer and Glass Substrates

Three-Dimensional S/CeO2/RGO Composites as Cathode Materials for Lithium–Sulfur Batteries

Graphene-Based Nanomaterials as the Cathode for Lithium-Sulfur Batteries

Contact Info

Product

Resources

About