The influence of nitrogen doping on reduced graphene oxide as highly cyclable Li-ion battery anode with enhanced performance

Taşdemir, Adnan; Kopuklu, Buse Bulut; Kirlioglu, Ahmet; Gürsel, Selmiye Alkan; Yürüm, Alp

doi:10.1016/j.ijhydene.2021.01.099

Cited by 25 publications

(19 citation statements)

References 59 publications

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“…The broad peak at 2θ 25.0 • and the one at 43.0 • in the rGO-based patterns are attributable to graphite crystal facets (002) and (100), respectively [28,37]. The peak of the graphite plane (002) is sharper and shifted to 26.5 • for the NGO materials, indicating that they present a higher crystallinity, the graphitic content is higher, and it is more reduced [30,38], which is also reflected by the presence of additional peaks at 45.0 • and 54.3 • , characteristic for the graphite structure [39]. These features may also hint that less exfoliation occurred compared to the rGO equivalents [8].…”

Section: Physicochemical Characterization Of Orr Catalystsmentioning

confidence: 94%

“…A defect of this kind can be present as nitrogen functionalities, i.e., pyridinic-N, pyrrolic-N, and graphitic-N. There are several reports that show that N-functionalities have an active role in electrocatalysis [29][30][31][32]. Such an effect could be beneficial for the ORR in direct alkaline ethanol fuel cells [8].…”

Section: Physicochemical Characterization Of Orr Catalystsmentioning

confidence: 99%

“…Defects of this kind can be present as nitrogen functionalities, i.e., pyridinic-N, pyrrolic-N, and graphitic-N. There are several reports that show that N-functionalities have an active role in electrocatalysis and could be beneficial for ORR [8,[29][30][31][32]. Liu et al [33] described that supporting CoMn 2 O 4 with nitrogen-doped graphene enhanced the electrochemical activity of the catalyst, which was attributed to the availability of more active sites, higher conductivity, and synergistic effects caused by the nitrogen atoms.…”

Section: Introductionmentioning

confidence: 99%

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Ag-MnxOy on Graphene Oxide Derivatives as Oxygen Reduction Reaction Catalyst in Alkaline Direct Ethanol Fuel Cells

et al. 2022

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In this study, Ag-MnxOy/C composite catalysts deposited on reduced graphene oxide (rGO) and, for the first time on N-doped graphene oxide (NGO), were prepared via a facile synthesis method. The influence of the carbon support material on the activity and stability of the oxygen reduction reaction (ORR) and on the tolerance to ethanol in alkaline medium was focused and investigated. The physicochemical properties of the Ag-MnxOy/C catalysts were analyzed by X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS), Brunauer–Emmett–Teller (BET) method, atomic absorption spectroscopy (AAS), inductively coupled plasma-mass spectrometry (ICP-MS), and thermogravimetric gas analysis (TGA). Electrochemical characterization was performed by rotating disk electrode (RDE) experiments. The results show that the active manganese species MnO2 was assembled as nanorods and nanospheres on rGO and NGO, respectively. Ag was assumed to be present as very small or amorphous particles. Similar redox processes for Ag-MnxOy/rGO and Ag-MnxOy/NGO were examined via cyclic voltammetry. The Ag-MnxOy/rGO resulted in a more negative diffusion limiting current density of −3.01 mA cm−2 compared to Ag-MnxOy/NGO. The onset potential of approximately 0.9 V vs. RHE and the favored 4-electron transfer pathway were independent of the support material. Ag-MnxOy/NGO exhibited a higher ORR stability, whereas Ag-MnxOy/rGO showed a better ethanol tolerance.

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Section: Physicochemical Characterization Of Orr Catalystsmentioning

confidence: 94%

Section: Physicochemical Characterization Of Orr Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ag-MnxOy on Graphene Oxide Derivatives as Oxygen Reduction Reaction Catalyst in Alkaline Direct Ethanol Fuel Cells

et al. 2022

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“…Their NrGO material exhibits a capacity of 240 mA h g À1 (reversible) at 10 A g À1 consistently with 90% capacity retention after 500 cycles. 19 Although LIBs have been playing a vital role as a power source for a wide range of portable applications, 20 researchers are worried about the limited reserves of Li (30 million tons) and its uneven geographical distribution. Furthermore, the recycle rate of Li from spent LIBs is approximately 1% on a yearly basis.…”

Section: Introductionmentioning

confidence: 99%

Tuning the electrochemical behavior of graphene oxide and reduced graphene oxide via doping hexagonal BN for high capacity negative electrodes for Li and Na ion batteries

Shamim

Piya

Rahman

et al. 2023

Phys. Chem. Chem. Phys.

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“…Due to their broad spectrum of applications in electric vehicles (EVs), hybrid EVs, and grid-scale storage in recent decades, lithium-ion batteries (LIBs) have been improved to meet the market demands for delivering high specific energies and power densities. − However, to achieve a lasting energy-based economy, cost, energy densities, charge rate, and safety need to be further improved. − Broad utilization of carbonaceous materials as conventional anode materials becomes limited due to their inferior rate performance and capacity for contemporary demands . Silicon (Si) with high theoretical capacities is one of the promising alternatives; however, it suffers from rapid capacity fade, thick solid electrolyte interface, and failure caused by the extreme volume changes (300%) …”

Section: Introductionmentioning

confidence: 99%

Titania-Based Freestanding Electronically Conductive Electrospun Anodes with Enhanced Performance for Li-Ion Batteries

Charkhesht

Yürüm

Gürsel

et al. 2021

ACS Appl. Energy Mater.

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A conductive composite binder made of poly(3,4-ethylenedioxythiophene)–poly(styrene sulfonate) (PEDOT:PSS) and polyethylene oxide is utilized in a freestanding electrospun anode, loaded with high amounts of TiO2 for Li-ion batteries (LIBs). This kind of conductive binder polymer which enhances the performance of the cell is used for the first time. To prove the superior characteristics of these PEDOT:PSS binder-based electrodes, the polyvinylidene fluoride-based fibrous anode was also prepared by electrospinning. The electrospinning condition was thoroughly investigated and optimized to reach a robust fully covered fibrous network. The performed electrochemical characterizations show that PEDOT:PSS is electrochemically active and leads to an increased gravimetric capacity up to about 302 mA h/g at 0.2 C. After 100 cycles, PEDOT:PSS-based anodes showed a stable cycling performance which is comparable with commercial titanate-based electrodes. The outstanding performance of the electrodes is attributed to the improved titania loading and the electronically conductive highly porous network which contributed to charge-transfer kinetics. This study shows the potential of PEDOT:PSS as a conductive binder for other active materials in LIBs and self-standing electrodes for lower resistance and higher specific capacity.

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The influence of nitrogen doping on reduced graphene oxide as highly cyclable Li-ion battery anode with enhanced performance

Cited by 25 publications

References 59 publications

Ag-MnxOy on Graphene Oxide Derivatives as Oxygen Reduction Reaction Catalyst in Alkaline Direct Ethanol Fuel Cells

Ag-MnxOy on Graphene Oxide Derivatives as Oxygen Reduction Reaction Catalyst in Alkaline Direct Ethanol Fuel Cells

Tuning the electrochemical behavior of graphene oxide and reduced graphene oxide via doping hexagonal BN for high capacity negative electrodes for Li and Na ion batteries

Titania-Based Freestanding Electronically Conductive Electrospun Anodes with Enhanced Performance for Li-Ion Batteries

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