Sulfur/nitrogen dual-doped three-dimensional reduced graphene oxide modified with mesoporous TiO2 nanoparticles for promising lithium-ion battery anodes

Huo, Jinghao; Ren, Yijie; Xue, Yujia; Liu, Yi; Guo, Shouwu

doi:10.1016/j.jallcom.2021.159183

Cited by 23 publications

(14 citation statements)

References 48 publications

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“…Titanium dioxide (TiO 2 ) has attracted great research attention as evident from the increased number of yearly publications on TiO 2 as a result of its unique properties and many practical and potential applications, including in photocatalysis, − luminescence, chemical sensing, solar cells, − electrochemistry, and advanced batteries. − The properties of TiO 2 are greatly affected by the structure, crystallinity, particle size, and surface area, which are controlled by a number of synthetic factors. ,− To reduce the reaction temperature (thus reducing the consumption of energy), hydro/solvothermal treatment of amorphous TiO 2 was usually adopted in the literature, in which the reaction temperature could be lowered to below 200 °C . In this process, the solvent environment is one of the determining factors in controlling the quality of the TiO 2 products.…”

Section: Introductionmentioning

confidence: 99%

Open-Structured Oxyfluorinated Titanium Phosphate Nanosheets Synthesized with the Assistance of an Ionic Liquid and Their Use as an Anode in Lithium-Ion Batteries

Gao

et al. 2021

Energy Fuels

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Two-dimensional Ti 2 (PO 4 ) 2 F nanosheets were synthesized with an ionic liquid (IL) containing PF 6 ([Bmim]PF 6 ) via a hydrothermal method. In comparison, only anatase titanium dioxide (TiO 2 ) nanoparticles were obtained when changing the type of anion ([Bmim]Br or [Bmim]BF 4 ) under the same conditions, suggesting that the anion type could greatly affect the crystalline phase, particle size, specific surface, and morphology of the final products; two-dimensional nanosheets were obtained in [Bmim]PF 6 , whereas nanocrystals with a relatively large surface were formed in the latter two ILs, as revealed by X-ray diffraction, nitrogen gas sorption, scanning electron microscopy, and transmission electron microscopy measurements. 1 H and 19 F nuclear magnetic resonance examinations of the fresh and recycled ILs suggest that the IL with the PF 6 anion experienced complete hydrolysis, which could be the key factor for the formation of such unique Ti 2 (PO 4 ) 2 F nanosheets. The electrochemical performances of such Ti 2 (PO 4 ) 2 F nanosheets were evaluated as anode materials in lithium-ion batteries (LIBs) in comparison to TiO 2 nanomaterials. The rate capability and cycling performance of the Ti 2 (PO 4 ) 2 F electrode outperformed the other two electrodes studied, as illustrated by cyclic voltammetry curves, charge/discharge behavior, and long cycling test, which is mainly due its unique layered structure and low surface area, which resulted in low volume change. The Ti 2 (PO 4 ) 2 F electrode derived from [Bmim]PF 6 displays a steady reversible capacity of 170 mAh/g and high cycling stability with over 70% capacity retention after 100 cycles. The synthesis of the controllable crystalline phase and morphology of Ti 2 (PO 4 ) 2 F nanomaterials with such ILs paves a useful route to prepare such alternative anode materials for LIBs.

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Section: Introductionmentioning

confidence: 99%

Open-Structured Oxyfluorinated Titanium Phosphate Nanosheets Synthesized with the Assistance of an Ionic Liquid and Their Use as an Anode in Lithium-Ion Batteries

Gao

et al. 2021

Energy Fuels

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“…The corresponding performances of TiO 2 (B)‐CNTs materials as anodes are better to many similar TiO 2 materials (Table 1). 39‐48 …”

Section: Resultsmentioning

confidence: 99%

“…The corresponding performances of TiO 2 (B)-CNTs materials as anodes are better to many similar TiO 2 materials (Table 1). [39][40][41][42][43][44][45][46][47][48] In order to reveal the excellent ability of TiO 2 (B)-CNTs for enhanced lithium storage performance, a series of electrochemical tests of the two electrodes were performed.…”

Section: Resultsmentioning

confidence: 99%

Defect‐rich bronze titanium dioxide ultrathin nanosheets supported on carbon nanotubes for enhanced lithium‐ion storages

Liú

et al. 2022

Intl J of Energy Research

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Summary Bronze titanium dioxide (TiO2[B]) is widely used to improve lithium‐ion storage performances owing to their open crystal structure, pseudocapacitance effect, and high theoretical specific capacity. However, the reported storage performances of TiO2(B) for lithium‐ion batteries (LIBs) are not ideal, due to the sluggish lithium‐ion diffusivity and poor electronic conductivity. Herein, mesoporous TiO2(B) ultrathin nanosheets with rich oxygen vacancies supported on carbon nanotubes (TiO2[B]‐CNTs) were constructed to enhance lithium‐ion storages via a simple solvothermal method combined with an annealing process under Ar atmosphere. The CNTs substrate in situ induces the orderly growth of mesoporous TiO2(B) ultrathin nanosheets with ~5 nm thinness and rich oxygen vacancies into a stabilized microstructure, which not only prevent aggregation of nanosheets, but also ensure effective exposure surface, as well as enhance the electronic conductivity. As‐obtained TiO2(B)‐CNTs electrodes in LIBs at 0.1 A g−1 after 100 cycles still show superior cycling performances with ~280 mAh g−1. Specifically, the TiO2(B)‐CNTs electrodes maintain good long‐term cycling performances. The specific capacities reached ~230 mAh g−1 at 0.5 A g−1in the 700th cycle, and ~150 mAh g−1 at 2.0 A g−1 in the 1000th cycle, respectively.

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“…The development of alkali metal ion batteries is another area that has been invaded by publications that use S and N codoped graphene. − In 2014, Ma et al produced S and N cocoped graphene using a chemical vapor deposition approach. The three-dimensional codoped graphene networks were utilized as anode materials for lithium ion batteries.…”

Section: Codoped or Dual-doped Graphenementioning

confidence: 99%

Heteroatom Codoped Graphene: The Importance of Nitrogen

Denis

2022

ACS Omega

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Although graphene has exceptional properties, they are not enough to solve the extensive list of pressing world problems. The substitutional doping of graphene using heteroatoms is one of the preferred methods to adjust the physicochemical properties of graphene. Much effort has been made to dope graphene using a single dopant. However, in recent years, substantial efforts have been made to dope graphene using two or more dopants. This review summarizes all the hard work done to synthesize, characterize, and develop new technologies using codoped, tridoped, and quaternary doped graphene. First, I discuss a simple question that has a complicated answer: When can an atom be considered a dopant? Then, I briefly discuss the single atom doped graphene as a starting point for this review's primary objective: codoped or dual-doped graphene. I extend the discussion to include tridoped and quaternary doped graphene. I review most of the systems that have been synthesized or studied theoretically and the areas in which they have been used to develop new technologies. Finally, I discuss the challenges and prospects that will shape the future of this fascinating field. It will be shown that most of the graphene systems that have been reported involve the use of nitrogen, and much effort is needed to develop codoped graphene systems that do not rely on the stabilizing effects of nitrogen. I expect that this review will contribute to introducing more researchers to this fascinating field and enlarge the list of codoped graphene systems that have been synthesized.

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Sulfur/nitrogen dual-doped three-dimensional reduced graphene oxide modified with mesoporous TiO2 nanoparticles for promising lithium-ion battery anodes

Cited by 23 publications

References 48 publications

Open-Structured Oxyfluorinated Titanium Phosphate Nanosheets Synthesized with the Assistance of an Ionic Liquid and Their Use as an Anode in Lithium-Ion Batteries

Open-Structured Oxyfluorinated Titanium Phosphate Nanosheets Synthesized with the Assistance of an Ionic Liquid and Their Use as an Anode in Lithium-Ion Batteries

Defect‐rich bronze titanium dioxide ultrathin nanosheets supported on carbon nanotubes for enhanced lithium‐ion storages

Heteroatom Codoped Graphene: The Importance of Nitrogen

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