Synthesis of graphitic carbon nitride at different thermal-pyrolysis temperature of urea and it application in lithium–sulfur batteries

Yao, Shanshan; Xue, Sikang; Peng, Sihuang; Jing, Maoxiang; Qian, Xinye; Shen, Xiangqian; Li, Tianbao; Wang, Yanhua

doi:10.1007/s10854-018-9906-2

Cited by 71 publications

(31 citation statements)

References 33 publications

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“…g‐C 3 N 4 nanosheets were synthesized according to our previous reported literatures with slight modification . Urea powder (10 g) was put into a crucible and then heated 550°C for 4 h. Finally, the crucible was cooled naturally to room temperature, and the sample was collected.…”

Section: Methodsmentioning

confidence: 99%

“…2.1 | Fabrication of g-C 3 N 4 /CNTs hybrid membrane and g-C 3 N 4 /CNTs/catholyte electrode g-C 3 N 4 nanosheets were synthesized according to our previous reported literatures with slight modification. 30 Urea powder (10 g) was put into a crucible and then heated 550 C for 4 h. Finally, the crucible was cooled naturally to room temperature, and the sample was collected. Chemical oxidation of commercial CNTs was carried out by using nitric acid.…”

Section: Methodsmentioning

confidence: 99%

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Freestanding graphitic carbon nitride‐based carbon nanotubes hybrid membrane as electrode for lithium/polysulfides batteries

Yao

Guo

et al. 2020

Int J Energy Res

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Summary Lithium sulfur batteries have drawled worldwide attention in recent years, which benefit of its high‐density energetic, low cost, and environmental benignity. Nevertheless, the shuttle effect of polysulfides and resulting self‐discharge lead to capacity fade loss and poor electrochemical performance. Herein, graphitic‐carbon nitride/carbon nanotubes (g‐C3N4/CNTs) hybrid membrane is fabricated by the flow‐direct vacuum filtration process. The as‐prepared 3‐D freestanding g‐C3N4/CNTs membrane employed as positive current collector containing Li2S6 catholyte solution for lithium/polysulfides batteries. The fabricated g‐C3N4/CNTs provide a physical barriers and chemisorption resist polysulfide shuttling. Moreover, the conductive network constructed by CNTs can empower sulfur to be evenly distributed in the cathode and accelerates electron transport. Thus, to further prove the cooperative effect of g‐C3N4 and CNTs, the freestanding g‐C3N4/CNTs/Li2S6 electrode exhibits more stable electrochemical performance than CNTs/Li2S6 electrode, deliver the first discharge capacity of 876 mAh g−1 at 0.5 C and maintained at 633 mAh g−1 after 300 cycles. The sulfur mass in electrode was increased to 7.11 mg, and the g‐C3N4/CNTs/Li2S6 electrode also possess a high capacity retention of 75.5%. Meanwhile, g‐C3N4 modified CNTs can not only trap polysulfides by strong adsorption but also effectively inhibit the self‐discharge behavior of lithium/polysulfides batteries. As a consequence, the g‐C3N4/CNTs composites for lithium/polysulfides batteries are indicating an excellent electrochemical stability with a long‐term storage without obvious capacity degradation.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Freestanding graphitic carbon nitride‐based carbon nanotubes hybrid membrane as electrode for lithium/polysulfides batteries

Yao

Guo

et al. 2020

Int J Energy Res

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“…At the same time, the predominance of pyridine‐N in N‐CNFs means that it has an effective chemisorption capacity for the interatomic attraction of LPs during discharge‐charge processes. After cycled, the significant reducing in the strength of pyridine‐N can be attributed to the increased amounts of LPs adsorbed on the surface of the cathode . Based on the above analysis, the 3D porous structure and nitrogen‐doped in NCFs are main prerequisites for achieving a high‐performance LSB.…”

Section: Resultsmentioning

confidence: 99%

“…After cycled, the significant reducing in the strength of pyridine-N can be attributed to the increased amounts of LPs adsorbed on the surface of the cathode. 40,41 Based on the above analysis, the 3D porous structure and nitrogen-doped in NCFs are main prerequisites for achieving a high-performance LSB.…”

Section: Materials Characterization Of Cnfs and N-cnfsmentioning

confidence: 99%

Electrospun zeolitic imidazolate framework-derived nitrogen-doped carbon nanofibers with high performance for lithium-sulfur batteries

et al. 2019

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Summary Three‐dimensional (3D) nitrogen‐doped carbon nanofibers (N‐CNFs) which were originating from nitrogen‐containing zeolitic imidazolate framework‐8 (ZIF‐8) were obtained by a combined electrospinning/carbonization technique. The pores uniformly distributed in N‐CNFs result in the improvement of electrical conductivity, increasing of BET surface area (142.82 m2 g−1), and high porosity. The as‐synthesized 3D free‐standing N‐CNFs membrane was applied as the current collector and binder free containing Li2S6 catholyte for lithium‐sulfur batteries. As a novel composite cathode, the free‐standing N‐CNFs/Li2S6 membrane shows more stable electrochemical behavior than the CNFs/Li2S6 membrane, exhibiting a high first‐cycle discharge specific capacity of 1175 mAh g−1at 0.1 C and keeping discharge specific capacity of 702 mAh g−1 at higher rate. More importantly, as the sulfur mass in cathodes was increased at 7.11 mg, the N‐CNFs/Li2S6 membrane delivered 467 mAh g−1after 150 cycles at 0.2 C. The excellent electrochemical properties of N‐CNFs/Li2S6 membrane can be ascribed to synergistic effects of high porosity and nitrogen‐doping in N‐CNFs from carbonized ZIF‐8, illustrating collective effects of physisorption and chemisorption for lithium polysulfides in discharge‐charge processes.

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“…For instance, g‐C 3 N 4 powders were prepared by Yao et al via direct pyrolysis of urea. [ 19 ] A known amount of precursor was kept in four covered corundum boats and heated at 520, 550, 580, and 610 °C for 4 h, respectively, to understand the effect of the temperature. A similar route was followed by Wang et al for the preparation of highly porous g‐C 3 N 4 with melamine.…”

Section: Synthesis Of G‐c3n4mentioning

confidence: 99%

Functionalized Graphitic Carbon Nitrides for Environmental and Sensing Applications

Fidan

Torabfam

Saleem

et al. 2021

Adv Energy and Sustain Res

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Graphitic carbon nitride (g‐C3N4) is a metal‐free semiconductor that has been widely regarded as a promising candidate for sustainable energy production or storage. In recent years, g‐C3N4 has become the center of attention by virtue of its impressive properties, such as being inexpensive, easily fabricable, nontoxic, highly stable, and environment friendly. Herein, the recent research developments related to g‐C3N4 are outlined, which sheds light on its future prospective. Various synthetic methods and their impact on the properties of g‐C3N4 are detailed, along with discussion on frequently used characterization methods. Different approaches for g‐C3N4 surface functionalization, mainly categorized under covalent and noncovalent strategies, are outlined. Moreover, the processing methods of g‐C3N4, such as g‐C3N4‐based thin films, hierarchical, and hybrid structures, are explored. Next, compared with the extensively studied energy‐related applications of the modified g‐C3N4s, relatively less‐examined areas, such as environmental and sensing, are presented. By highlighting the strong potential of these materials and the existing research gaps, new researchers are encouraged to produce functional g‐C3N4‐based materials using diverse surface modification and processing routes.

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Synthesis of graphitic carbon nitride at different thermal-pyrolysis temperature of urea and it application in lithium–sulfur batteries

Cited by 71 publications

References 33 publications

Freestanding graphitic carbon nitride‐based carbon nanotubes hybrid membrane as electrode for lithium/polysulfides batteries

Freestanding graphitic carbon nitride‐based carbon nanotubes hybrid membrane as electrode for lithium/polysulfides batteries

Electrospun zeolitic imidazolate framework-derived nitrogen-doped carbon nanofibers with high performance for lithium-sulfur batteries

Functionalized Graphitic Carbon Nitrides for Environmental and Sensing Applications

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