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Macroscopic MXene ribbon with oriented sheet stacking for high‐performance flexible supercapacitors

Carbon Energy 2021年第1期3卷 142-152页

作者： Chao Zhu Fengxia Geng College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhouChina

Flexible and wearable fiber electrodes with high conductivity and acceptable electrochemical behavior are crucial for extending the application of nextgeneration portable electronics,the development of which,however,is very ***‐dimensional sheets are known to be excellent units for assembling fiber entities,particularly when sheets are oriented in a stacking manner,which helps integrate their intrinsic in‐plane advantages,especially those related with mechanical and electronic *** this study,we developed a flexible macroscopic and continuous fiber in an unusual ribbon shape composed solely of Ti3C2 sheets,a typical member of the MXene *** ribbon morphology was realized through highly ordered stacking of Ti3C2,which imparts fibers with favorable mechanical *** on the intrinsic metallic conductivity of Ti3C2 sheets and the oriented stacking structure,the developed macroscopic ribbon exhibited excellent conductivity for both electrons(up to 2458 S/cm)and ions.A fiber‐shaped asymmetric supercapacitor using the developed macroscopic ribbon as a cathode coupled with reduced graphene oxide fibers as an anode delivered a competitive maximum volumetric energy density of 58.4mWh/cm3(20.0Wh/kg)while maintaining a power level of 1679.0mW/cm3(581.0 W/kg)and excellent cycling stability(92.4%retention after 10000 cycles at 10 A/g).This study highlights the excellent potential of MXene as a platform for macroscopic assembly and definitely broadens the applications of MXene materials in wearable electronics.

关键词： flexible supercapacitor ribbon fiber Ti3C2 sheets

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Magnetic properties and special morphology of barium ferrite via electrospinning

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Rare Metals 2017年第2期36卷 113-117页

作者： Gui-Fang Liu Run-Hua Fan Zi-Dong Zhang Jing Li Min Chen Qian-Qian Li Lu Lu Pei-Tao Xie Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationShandong UniversityJinan 250061China

Barium ferrite micro-/nanofibers with special morphology,nanowires with diameters of 100 nm,nanoribbons with diameters of 1μm,and nanotubes with outer diameter of about 300 nm while inner diameter of 100 nm were successfully prepared via electrospinning using different solvents（dimethyl formamide（DMF）,solutions of deionized water and ethyl alcohol,and solutions of deionized water and acetic acid,respectively）.The barium ferrite micro-/nanofibers were characterized by scanning electron microscope（SEM）,X-ray diffraction analysis（XRD）,and vibration sample magnetometer（VSM）.The results demonstrate that the pure BaFe12O19 ferrite phase is successfully *** the SEM results show excellent *** magnetic hysteresis loops demonstrate that their magnetic properties are quite different with different *** specific saturation magnetization is approximately the same（46.12-49.17 A·m^2·kg^-1）,but the coercivity of the BaFe12O19 increases from wires（190.08 kA·m^-1）,ribbons（224.16 kA·m^-1） to tubes（258.88 kA·m^-1）.

关键词： Electrostatic spinning Barium ferrite Hollow fiber ribbon fiber

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