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Belousova, T. A.

doi:10.1023/a:1016325013680

Cited by 11 publications

(5 citation statements)

References 2 publications

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“…In the XPS analysis of SC-CP-G (Figure d), the N 1s spectrum exhibits two resonances, located at 398.4 and 399.9 eV, representing the pyridinic group and substitutional graphite group, respectively. ,, Correspondingly, the N 1s spectrum of SC-PAN-GO (Figure S4a) shows only one peak at 399.0 eV, which is denoted as the cyanic group. , Figure e and Figure S4b show the infrared spectra of SC-CP-G and SC-PAN-GO, respectively. Before heat treatment, SC-PAN-GO contains many kinds of chemical bonds and functional groups, such as CN, CO, COH, −CH 2 , , CH, , COC, , and CO . Afterward, the SC-PAN-GO undergoes a series of structural transformations and takes off some small molecules in the subsequent reactions.…”

Section: Resultsmentioning

confidence: 99%

“…30,38 Figure 3e and Figure S4b show the infrared spectra of SC-CP-G and SC-PAN-GO, respectively. Before heat treatment, SC-PAN-GO contains many kinds of chemical bonds and functional groups, such as C�N, 39 C�O, 40 C� OH, 41 −CH 2 , 35,42 C�H, 35,43 C�O�C, 44,45 and C�O. 45 Afterward, the SC-PAN-GO undergoes a series of structural transformations and takes off some small molecules in the subsequent reactions.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Free-Standing Stable Silicon-Based Anode with Exceptional Flexibility Realized by a Multifunctional Structure Design in Multiple Dimensions

Yang

Song

Chen

et al. 2022

ACS Appl. Mater. Interfaces

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Cyclized polyacrylonitrile (cPAN) with decently flexible, elastic, and conductive properties is a promising substrate or binder material for flexible devices. However, it is infeasible to accommodate the large volume expansion and contribute the exceptional rate capability of silicon anodes in lithium-ion batteries only counting on the limited elasticity and conductivity of cPAN. Herein, we report a robust silicon/carbon-cPAN-graphene (SC-CP-G) composite membrane with excellent flexibility based on a multifunctional structure design in multiple dimensions, which can be used as a free-standing integrated anode for lithium ion batteries. In this integrated electrode, silicon nanoparticles are encapsulated in porous carbon with in situ formed confined space, and the silicon/carbon particles are further embedded in cPAN nanofibers, which are inextricably interwoven with a reduced graphene oxide film, forming an interpenetrating network architecture. The unique hierarchical and functional structure design greatly improves the mechanical performance, cycling stability, and capacity accessibility of silicon electrodes, delivering a specific capacity of 1847 mA h g–1 at 2 A g–1 and a capacity retention of 87% after 150 cycles.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Free-Standing Stable Silicon-Based Anode with Exceptional Flexibility Realized by a Multifunctional Structure Design in Multiple Dimensions

Yang

Song

Chen

et al. 2022

ACS Appl. Mater. Interfaces

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“…Carbonyl stretching vibration at 1734 cm −1 was named as A(𝜈 C=O), and deformation vibration of methylene groups at 1445 cm −1 as A(𝛿 C-H2), and deformation vibration of methine groups at 1360 cm −1 as A(𝛿 C-H=). Band positions, band assignments, and references [50][51][52][53][54][55][56][57][58][59][60][61] are tabulated in Table S1, Supporting Information.…”

Section: Fourier Transformed Infrared Spectroscopymentioning

confidence: 99%

Influence of Temperature and Dose Rate of E‐Beam Modification on Electron‐Induced Changes in Polyacrylonitrile Fibers

Leopold

Müller

Zimmerer

et al. 2022

Macro Chemistry & Physics

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The present study investigates the influence of modification temperature and the dose rate of electron modification on the progress of these and the three important thermal induced reactions namely: cyclization, dehydrogenation, and oxidation. Since electron induced chemical reactions strongly depend on the polymer chain segment mobility, temperatures below the glass transition temperature (T g ) and above T g are tested. Electron paramagnetic resonance (EPR) spectroscopy measurements show the presence of alkyl-, peroxy-, and polyimineradicals alongside each other. Gel measurements identified a temperature dependent crosslinking behavior at doses ⩽ 150 kGy, but no dose rate depending on crosslinking. Changes in chemical structure are investigated using Fourier transform infrared spectroscopy (FT-IR), showing a dependency of stabilization behavior depending on dose and temperate more than on dose rate. Thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC) measurements complete the analyses by describing the behavior during further thermal treatments and measuring the residual mass at 800 °C.

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“…So in current studies, an attempt has been made in order to explain the role of dissolving methods in the dissolution of PAN in [BMIM]Cl. This dissolution should be caused by the interruption and breaking of the dipolar-dipolar interactions of PAN [24,25] and the formation of interactions between ACN group and 1-butyl-3-methylimidazolium cation [BMIM] 1 [26]. All The frequency sweep measurements were carried out in order to further examine the microstructure formation of all the solutions with concentrations of 13 wt%.…”

Section: Effects Of Dissolving Process On the Rheological Behaviors Omentioning

confidence: 99%

Characteristics of polyacrylonitrile solutions and fibers varied with the dissolution process in ionic liquid

et al. 2014

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The concentrated polyacrylonitrile (PAN) solutions were prepared with 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) as solvent by static state, stirring, and kneading. The steady and oscillatory shear tests were carried out to investigate the viscoelastic behaviors of the PAN/ [BMIM]Cl solutions by rotational rheometer. It was found that the zero shear-rate viscosity and relaxation time of the solution prepared by kneading were lowest and the non-Newtonian index was largest among the solution. During kneading, the gelation temperature of the viscous and homogenous solution was at the lowest temperature 22.7 C among the all three solutions. Only the solutions prepared by stirring and kneading could be spun by dryjet wet spinning technology. The fiber processed with the solution prepared by kneading could be drawn with a higher draw ratio, showing the larger draw ability. The supramolecular structure and properties of the fibers were studied by synchrotron wide-angle X-ray diffraction (WAXD) technologies, dynamic mechanical analysis (DMA), and mechanical tests. All the results showed that the kneading is an efficient method for PAN fiber spinning with [BMIM]Cl as solvent. It lead to the investigation of the methods of preparation of PAN solution in [BMIM]Cl, which affect the homogeneity of the solutions and hence the resulting characteristics of PAN fibers. POLYM. ENG. SCI., 55:558-564, 2015.

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Cited by 11 publications

References 2 publications

Free-Standing Stable Silicon-Based Anode with Exceptional Flexibility Realized by a Multifunctional Structure Design in Multiple Dimensions

Free-Standing Stable Silicon-Based Anode with Exceptional Flexibility Realized by a Multifunctional Structure Design in Multiple Dimensions

Influence of Temperature and Dose Rate of E‐Beam Modification on Electron‐Induced Changes in Polyacrylonitrile Fibers

Characteristics of polyacrylonitrile solutions and fibers varied with the dissolution process in ionic liquid

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