Micro-supercapacitors with excellent electrochemical performance and aesthetic property are realized using the carbon nanotubes/manganese dioxide nanosheets（CNTs/δ-MnO2） composite as electrodes.This CNTs/d-MnO2 nan...Micro-supercapacitors with excellent electrochemical performance and aesthetic property are realized using the carbon nanotubes/manganese dioxide nanosheets（CNTs/δ-MnO2） composite as electrodes.This CNTs/d-MnO2 nanocomposite is excellently compatible with the slurry dispensing process for electrode fabrication, and thus is conducive for preparing thick electrode films, which exhibits a specific capacitance of 257 F/g with an electrode thickness of 13μm. By involving laser-scribing technique, the electrode film can be patterned with a high resolution and fabricated into a planar micro-supercapacitor,showing the maximum energy density of 6.83 mWh/cm^3 at the power density of 154.3 mW/cm^3, and maintained a value of 2.71 mWh/cm^3 at the maximum power density of 2557.5 mW/cm^3. Considering the versatility of the laser-scribing technical platform, the micro-supercapacitors fabricated in this way exhibit excellent aesthetic property and can cater to various miniaturized wearable electronic applications. This technology opens up opportunities for facile and scalable fabrication of high performance energy devices with shape diversity and a meaning of art.展开更多
Based on the functional properties of electrospun cellulose nanofibers(CNF),scientists are showing substantial interest to enhance the aesthetic properties.However,the lower color yield has remained a big challenge du...Based on the functional properties of electrospun cellulose nanofibers(CNF),scientists are showing substantial interest to enhance the aesthetic properties.However,the lower color yield has remained a big challenge due to the higher surface area of nanofibers.In this study,we attempted to improve the color yield properties of CNF by the pad-steam dyeing method.Neat CNF was obtained by deacetylation of electrospun cellulose acetate(CA)nanofibers.Three different kinds of reactive dyes were used and pad-steam dyeing parameters were optimized.SEM images revealed smooth morphology with an increase in the average diameter of nanofibers.FTIR results showed no change in the chemical structure after dyeing of CNF.Color fastness results demonstrated excellent ratings for reactive dyes,which indicate good dye fixation properties and no color loss during the washing process.The results confirm that the pad-steam dyeing method can be potentially considered to improve the aesthetic properties of CNF,which can be utilized for functional garments,such as breathable raincoats and disposable face masks.展开更多
基金financially supported by the National Key Basic Research Program of China(No.2014CB932400)the National Nature Science Foundation of China Nos.51607102,51578310)+2 种基金China Postdoctoral Science Foundation(No.2016M601017)Guangdong Province Science and Technology Department(Nos.2014B090915002,2014A010105002,2015A030306010)Natural Science Foundation of Guangdong Province(No.2017A030313279)
文摘Micro-supercapacitors with excellent electrochemical performance and aesthetic property are realized using the carbon nanotubes/manganese dioxide nanosheets（CNTs/δ-MnO2） composite as electrodes.This CNTs/d-MnO2 nanocomposite is excellently compatible with the slurry dispensing process for electrode fabrication, and thus is conducive for preparing thick electrode films, which exhibits a specific capacitance of 257 F/g with an electrode thickness of 13μm. By involving laser-scribing technique, the electrode film can be patterned with a high resolution and fabricated into a planar micro-supercapacitor,showing the maximum energy density of 6.83 mWh/cm^3 at the power density of 154.3 mW/cm^3, and maintained a value of 2.71 mWh/cm^3 at the maximum power density of 2557.5 mW/cm^3. Considering the versatility of the laser-scribing technical platform, the micro-supercapacitors fabricated in this way exhibit excellent aesthetic property and can cater to various miniaturized wearable electronic applications. This technology opens up opportunities for facile and scalable fabrication of high performance energy devices with shape diversity and a meaning of art.
基金This work was supported by the Key-Area Research and Development Program of Guangdong Province,China(No.2019B010941001)the Natural Science Foundation of Guangdong Province,China(No.2018A0303100022).
文摘Based on the functional properties of electrospun cellulose nanofibers(CNF),scientists are showing substantial interest to enhance the aesthetic properties.However,the lower color yield has remained a big challenge due to the higher surface area of nanofibers.In this study,we attempted to improve the color yield properties of CNF by the pad-steam dyeing method.Neat CNF was obtained by deacetylation of electrospun cellulose acetate(CA)nanofibers.Three different kinds of reactive dyes were used and pad-steam dyeing parameters were optimized.SEM images revealed smooth morphology with an increase in the average diameter of nanofibers.FTIR results showed no change in the chemical structure after dyeing of CNF.Color fastness results demonstrated excellent ratings for reactive dyes,which indicate good dye fixation properties and no color loss during the washing process.The results confirm that the pad-steam dyeing method can be potentially considered to improve the aesthetic properties of CNF,which can be utilized for functional garments,such as breathable raincoats and disposable face masks.
