The D- and G-branches associated with the Raman spectrum of thin-film carbon

Schmidt, K. J.; Laumer, Jonathan; O’Leary, Stephen K.

doi:10.1016/j.ssc.2022.115041

Cited by 9 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure 4a, two distinct peaks are observed at 1329 and 1591 cm −1 , corresponding to D and G bands, respectively. The D band represents out-of-plane vibrations of carbon atoms as a result of the presence of structural defects, while the G band relates to in-plane stretching vibrations of sp 2 -hybridized C. 17 After peak fitting and integration, the I D /I G value of SiO 0.71 C 1.95 N 0.47 is calculated to be 0.98, indicating a high degree of disorder in graphite. 18 Nitrogen adsorption−desorption isotherms and pore size distribution curves are employed to investigate the surface area and porous characteristics of SiO 0.71 C 1.95 N 0.47 , as shown in Figure 4b.…”

Section: Methodsmentioning

confidence: 99%

Analysis of the Lithium Storage Mechanism in the SiO_x/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery

Zhang

Fan²,

Tan

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

The SiO x /C composite, as a form of silicon-based materials, has been considered as an attractive alternative anode for next-generation lithium-ion batteries. The porous SiO 0.71 C 1.95 N 0.47 anode material exhibiting robust Si−O skeletons wrapped by carbon layers is successfully prepared and delivers an initial capacity of over 1700 mAh g −1 with an initial coulombic efficiency of 69.4% and favorable cycle life. Both Si (2p) X-ray photoelectron spectroscopy (XPS) and 29 Si nuclear magnetic resonance (NMR) demonstrate the existence of SiO 4 and SiO 3 C units as main lithium storage sites in the original state. The XPS curve moved toward the direction of the binding energy decreasing with NMR spectra shifting to a high field after the first lithiation process. The massive capacity loss during the first discharge and charge cycle results from the formation of irreversible Li silicate (Li 2 SiO 4 ). The fluctuation of the charge and discharge capacity, including a persistent decline during the first 30 cycles and a continuous elevation in the following 400 cycles, could be attributed to the participated degree of reversible Li silicate (Li 2 SiO 3 and Li 2 Si 2 O 5 ) in the delithiation process. The Si−O skeletons are gradually corroded and ultimately destroyed in the final 400 cycles, leading to the sharp drop of the cycling performance of the half-cell.

show abstract

Section: Methodsmentioning

confidence: 99%

Analysis of the Lithium Storage Mechanism in the SiO_x/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery

Zhang

Fan²,

Tan

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…To interpret the Raman spectra, the D and G bands were meticulously analyzed using a two-peak Gaussian peak fitting method, considering a spectral range between approximately 1000 and 1800 cm −1 , aligning with the methodologies described in the study conducted by Schmidt et al [60].…”

Section: Chemical Composition Structure Hardness and Reduced Young's ...mentioning

confidence: 99%

Influence of 1-Ethyl-3-methylimidazolium Diethylphosphate Ionic Liquid on the Performance of Eu- and Gd-Doped Diamond-like Carbon Coatings

Sadeghi,

Omiya,

Fernandes

et al. 2024

Lubricants

View full text Add to dashboard Cite

A composite lubricating system that combines solid and liquid lubrication can create a synergistic effect by leveraging the strengths of both types of lubricants. Solid lubrication coatings possess advantageous load-bearing abilities and exhibit low volatility. By adopting this approach, the system retains the merits of solid lubrication while simultaneously harnessing the advantages of liquid lubrication. The unique properties of diamond-like carbon coatings (DLCs) offer the potential to create binding locations for lubricant additives by introducing dopant elements that have a high affinity with additives. In the present work, the combined use of europium-doped diamond-like carbon (Eu-doped DLC) with varying atomic concentrations of the dopant element (1.7 at. % and 2.4 at. %) and gadolinium-doped diamond-like carbon (Gd-doped DLC) with different atomic concentrations of the dopant element (1.7 at. % and 2.3 at. %) was studied alongside a pure DLC coating and the incorporation of an ionic liquid (IL) additive in a tribological block-on-ring system. The focus was on the 1-Ethyl-3-methylimidazolium diethylphosphate ionic liquid with a concentration of 1 wt. % in polyalphaolefin (PAO) 8. Among the investigated pairs, the coefficient of friction (CoF) of 1.7 at. % Eu-doped DLC coupled with the IL was the smallest in boundary, mixed, and elastohydrodynamic lubrication regimes. Quantification of wear was challenging due to minimal and localized wear on the DLC coating surfaces. The decrease in friction within the boundary lubrication regime underscores the promise of mechanical systems that integrate 1.7 atomic percent Europium-doped diamond-like carbon coatings with ionic liquids (IL). This study presents a compelling avenue for future scholarly exploration and research efforts focused on reducing friction and improving the efficiency of moving components, particularly in situations where tribological properties exert a substantial influence

show abstract

Comparative Study on the Graphitization Index of Carbonaceous Reducing Agents Used in Silicon Smelting

Tao,

Chen,

et al. 2024

Silicon

View full text Add to dashboard Cite

The D- and G-branches associated with the Raman spectrum of thin-film carbon

Cited by 9 publications

References 22 publications

Analysis of the Lithium Storage Mechanism in the SiO_x/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery

Analysis of the Lithium Storage Mechanism in the SiO_x/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery

Influence of 1-Ethyl-3-methylimidazolium Diethylphosphate Ionic Liquid on the Performance of Eu- and Gd-Doped Diamond-like Carbon Coatings

Comparative Study on the Graphitization Index of Carbonaceous Reducing Agents Used in Silicon Smelting

Contact Info

Product

Resources

About

The D- and G-branches associated with the Raman spectrum of thin-film carbon

Cited by 9 publications

References 22 publications

Analysis of the Lithium Storage Mechanism in the SiOx/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery

Analysis of the Lithium Storage Mechanism in the SiOx/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery

Influence of 1-Ethyl-3-methylimidazolium Diethylphosphate Ionic Liquid on the Performance of Eu- and Gd-Doped Diamond-like Carbon Coatings

Comparative Study on the Graphitization Index of Carbonaceous Reducing Agents Used in Silicon Smelting

Contact Info

Product

Resources

About

Analysis of the Lithium Storage Mechanism in the SiO_x/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery

Analysis of the Lithium Storage Mechanism in the SiO_x/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery