Tunable and weakly negative permittivity in carbon/silicon nitride composites with different carbonizing temperatures

Cheng, Chuanbing; Fan, Runhua; Wang, Zhongyang; Shao, Qian; Guo, Xingkui; Xie, Peitao; Yin, Yansheng; Zhang, Yuliang; Liu, An; Lei, Yanhua; Ryu, Jongeun; Shankar, Akash; Guo, Zhanhu

doi:10.1016/j.carbon.2017.09.037

Cited by 211 publications

(84 citation statements)

References 73 publications

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“…The intensity ratio of the two peaks ( I D / I G ) is considered as an indicator for the graphitization degree of carbon materials. In this work, the ratio close to 1 implies the low graphitization degree of the carbon yielded …”

Section: Resultsmentioning

confidence: 79%

Boosting the electrochemical performance of Li₄Ti₅O₁₂ through nitrogen‐doped carbon coating

Liu

Huang

et al. 2019

Applied Organom Chemis

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The poor electronic conductivity restricts the wide applications of Li4Ti5O12 as anode materials in Li‐ion batteries. We report a facile approach to fabricate nitrogen‐doped carbon‐coated Li4Ti5O12 through carbonizing pyrrole and pyridine at different temperatures. Comparative experiments demonstrated that the carbon content plays a key role in governing the cycling performance and rate capability of Li4Ti5O12. The composites with higher carbon content exhibited superior cycling performance, and the composite prepared at 600 °C using pyridine as the carbon source gave the best cycling and rate performance.

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Section: Resultsmentioning

confidence: 79%

Boosting the electrochemical performance of Li₄Ti₅O₁₂ through nitrogen‐doped carbon coating

Liu

Huang

et al. 2019

Applied Organom Chemis

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“…In among of various materials, conductive materials are very interested. Conductive materials such as carbon nanotube, graphene, graphene oxide, polyaniline, polypyrrole, and metal have been widely used in various applications including corrosion, electromagnetic interference (EMI) fielding, polluted water treatment, catalysis, battery, CO 2 reduction, structural composites, and medicine …”

Section: Introductionmentioning

confidence: 99%

Electrospun electroactive nanofibers of gelatin‐oligoaniline/Poly (vinyl alcohol) templates for architecting of cardiac tissue with on‐demand drug release

Shojaie

Rostamian

Samadi

et al. 2019

Polymers for Advanced Techs

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In this study, grafted gelatin with oligoaniline (GelOA) was synthesized and then mixed with Poly (vinyl alcohol) (PVA). Several scaffolds with different ratio of PVA/GelOA were electrospun to fabricate electroactive scaffolds. GelOA was characterized using Fourier‐transform infrared spectroscopy (FTIR); moreover, nanofiber properties were evaluated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and scanning electron microscope (SEM) analyses. Nanofibers diameter was decreased with aniline oligomer increment form 300 to 150 nm because of the hydrophobic nature of the aniline oligomer. Aniline oligomer electroactivity was studied using cyclic voltammetry, which exhibited two redox peaks at 0.4 and 0.6. Moreover, aniline oligomer enhancement resulted in melting point increasing from 220°C to 230°C because of the crystallinity increment. To assess the biocompatibility of nanofibers, cell viability and cell adhesion were tracked using mesenchymal stem cell (MSCs). It was revealed that the presence of aniline oligomer leads to enhancing the conductivity, thermal properties and lowering the degradation rate and drug release. Among of different scaffolds, sample with high content of GelOA shows better behavior in physical and biological properties. Accumulative drug releases under applied electrical field at 40 minutes showed that the drug release for stimulated condition is about 33% more than the unapplied electrical field one.

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“…In today's society, various electronic devices are widely used in almost all fields, including military, commerce, science, and communication. Electromagnetic interference (EMI) and electromagnetic pollution are inevitable results of this widespread use . EMI shielding materials are necessary to prevent electromagnetic radiation in work spaces and to protect instruments from electromagnetic interference .…”

Section: Introductionmentioning

confidence: 99%

Resistance gradient polymeric electromagnetic shielding composites: Preparation and Characterization

et al. 2018

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Based on the principle of Stokes’ law, a series of polyvinyl butyral (PVB)/nickel (Ni) composite films with a resistance gradient were successfully prepared using a suspension casting method with the aid of gravity. Gradient distribution structure, conductive and mechanical properties, and electromagnetic shielding effectiveness (SE) were investigated. Scanning electron microscopy (SEM) observations and energy‐dispersive spectrometer (EDS) detection show that the gradient distribution of Ni particles in the PVB matrix was formed along the thickness‐direction. A surface resistivity difference of 10 orders of magnitude appears between the top surface (PVB‐rich side) and the bottom surface (Ni‐rich side). Percolation transformation occurs in the range of Ni content of 3.0∼4.5 vol% at the Ni‐rich side, which is much lower than that of PVB/Ni composites with homogeneous Ni distribution. The gradient distribution structure grants the composite both good electromagnetic shielding performance and good mechanical properties. When the Ni loading reaches 10.5 vol% in the film, its SE value rises to 30 dB, which is 15 dB higher than that of a homogenous film with the same filler content. It is believed that electrically conductive gradient polymeric composites have potential application value in the field of electromagnetic shielding. POLYM. COMPOS., 40:1842–1849, 2019. © 2018 Society of Plastics Engineers

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Tunable and weakly negative permittivity in carbon/silicon nitride composites with different carbonizing temperatures

Cited by 211 publications

References 73 publications

Boosting the electrochemical performance of Li₄Ti₅O₁₂ through nitrogen‐doped carbon coating

Boosting the electrochemical performance of Li₄Ti₅O₁₂ through nitrogen‐doped carbon coating

Electrospun electroactive nanofibers of gelatin‐oligoaniline/Poly (vinyl alcohol) templates for architecting of cardiac tissue with on‐demand drug release

Resistance gradient polymeric electromagnetic shielding composites: Preparation and Characterization

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Tunable and weakly negative permittivity in carbon/silicon nitride composites with different carbonizing temperatures

Cited by 211 publications

References 73 publications

Boosting the electrochemical performance of Li4Ti5O12 through nitrogen‐doped carbon coating

Boosting the electrochemical performance of Li4Ti5O12 through nitrogen‐doped carbon coating

Electrospun electroactive nanofibers of gelatin‐oligoaniline/Poly (vinyl alcohol) templates for architecting of cardiac tissue with on‐demand drug release

Resistance gradient polymeric electromagnetic shielding composites: Preparation and Characterization

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Boosting the electrochemical performance of Li₄Ti₅O₁₂ through nitrogen‐doped carbon coating

Boosting the electrochemical performance of Li₄Ti₅O₁₂ through nitrogen‐doped carbon coating