Owing to the robust scalability,ease of control and substantial industrial applications,the utilization of electrospinning technology to produce piezoelectric nanofiber materials demonstrates a significant potential i...Owing to the robust scalability,ease of control and substantial industrial applications,the utilization of electrospinning technology to produce piezoelectric nanofiber materials demonstrates a significant potential in the development of wearable products including flexible wearable sensors.However,it is unfortunate that the attainment of high-performance piezoelec-tric materials through this method remains a challenging task.Herein,a high-performance composite nanofiber membrane with a coherent and uniformly dispersed two-dimensional network topology composed of polyvinylidene fluoride(PVDF)/dopamine(DA)nanofiber membranes and ultrafine PVDF/DA nanofibers was successfully fabricated by the electrospinning technique.Based on the evidence obtained from simulations,experimental and theoretical results,it was confirmed that the unique structure of the nanofiber membrane significantly enhances the piezoelectric performance.The present PVDF/DA composite nanofibers demonstrated a remarkable piezoelectric performance such as a wide response range(1.5–40 N),high sensitivity to weak forces(0–4 N,7.29 V N^(-1)),and outstanding operational durability.Furthermore,the potential application of the present PVDF/DA membrane as a flexible wearable sensor for monitoring human motion and subtle physiological signals has also been validated.This work not only introduces a novel strategy for the application of electrospun nanofibers in sensors but also provides new insights into high-performance piezoelectric materials.展开更多
Flexible wearable batteries are widely used in smartwatches, foldable phones, and fitness trackers due to their thinness and small size. Zinc-based batteries have the advantages of low cost, high safety, and ecofriend...Flexible wearable batteries are widely used in smartwatches, foldable phones, and fitness trackers due to their thinness and small size. Zinc-based batteries have the advantages of low cost, high safety, and ecofriendliness, which are considered to be the best alternative to flexible lithium-ion batteries(LIBs).Therefore, wearable flexible zinc-ion batteries(FZIBs) have attracted considerable interest as a promising energy storage device. Electrospun nanofibers(ESNFs) have great potential for application in wearable FZIBs due to their low density, high porosity, large specific surface area, and flexibility. Moreover, electrospinning technology can achieve the versatility of nanofibers through structural design and incorporation of other multifunctional materials. This paper reviews a wide range of applications of electrospinning in FZIBs, mainly in terms of cathode, anode, separator, polymer electrolyte, and all-inone flexible batteries. Firstly, the electrospinning device, principles, and influencing parameters are briefly described, showing its positive impact on FZIBs. Subsequently, the energy storage principles and electrode configurations of FZIBs are described, and some of the common problems of the batteries are illustrated, including zinc anode dendrite growth, corrosion, cathode structure collapse, and poor electrical conductivity. This is followed by a comprehensive overview of research progress on the individual components of FZIBs(cathode, anode, separator, and polymer electrolyte) from the perspective of electrostatically spun fiber materials and an in-depth study of all-in-one flexible batteries. Finally, the challenges and future development of FZIBs are individually concluded and look forward. We hope that this work will provide new ideas and avenues for the development of advanced energy technologies and smart wearable systems.展开更多
Ultrathin free-standing electrospun carbon nanofiber web（ECNFW） used for the electrodes of the vanadium flow battery（VFB） has been fabricated by the electrospinning technique followed by the carbonization process ...Ultrathin free-standing electrospun carbon nanofiber web（ECNFW） used for the electrodes of the vanadium flow battery（VFB） has been fabricated by the electrospinning technique followed by the carbonization process in this study to reduce the ohmic polarization of the VFB. The microstructure, surface chemistry and electrochemical performance of ECNFW carbonized at various temperatures from 800 to 1400 °C have been investigated. The results show that ECNFW carbonized at 1100 °C exhibits the highest electrocatalytic activity toward the V;/V;redox reaction, and its electrocatalytic activity decreases along with the increase of carbonization temperature due to the drooping of the surface functional groups.While for the VO;/VO;redox couple, the electrocatalytic activity of ECNFW carbonized above 1100 °C barely changes as the carbonization temperature rises. It indicates that the surface functional groups could function as the reaction sites for the V;/V;redox couple, but have not any catalytic effect for the VO;/VO;redox couple. And the single cell test result suggests that ECNFW carbonized at 1100 °C is a promising material as the VFB electrode and the VFB with ECNFW electrodes obtains a super low internal resistance of 250 mΩ cm;.展开更多
Fuel cells,rechargeable metal–air batteries,metal-ion batteries,and supercapacitors have been regarded as prospective energy sources technologies to replace the fossil energy.Moreover,electrochemical sensors also hav...Fuel cells,rechargeable metal–air batteries,metal-ion batteries,and supercapacitors have been regarded as prospective energy sources technologies to replace the fossil energy.Moreover,electrochemical sensors also have been successfully developed as promising platforms for detecting pollutants,drug analysis,and healthcare monitoring.Electrospinning is a scalable and suitable technique to design and fabricate diverse nanofibers and their nanocomposites for key components in electrochemical applications.Herein,a comprehensive review of electrospinning,from the technological innovations to the novel electrospun composite nanofibers,is provided.More importantly,the recent advances on the diverse components of electrochemical devices are highlighted,followed with the detailed discussion about the corresponding enhancement mechanism based on the electrospun nanomaterials.Finally,the currently faced challenges on the fabrication of electrospun nanomaterials are raised and a brief perspective for the future development of electrospun nanomaterials-based electrochemical applications is prospected.展开更多
Nowadays, while human requirements are extending, producing nanofibers and nanofiber based products are progressing rapidly. Nanofibers have received considerable study in recent years using various polymers and metho...Nowadays, while human requirements are extending, producing nanofibers and nanofiber based products are progressing rapidly. Nanofibers have received considerable study in recent years using various polymers and methods. PAN (Polyacrylonitryle) nanofibers have shown a great potential in producing nanofibers and nanofibre yarn as precursor polymers for making high performance carbon fiber. There is a lack of information about yarn and woven fabrics made out of nanofibers. Current research is aiming to manufacture yarn using well-known electrospinning technique and converting it to woven fabric. A continuous yarn was produced by changing production parameters and using simultaneous twisting and collecting. Values of twist and rate of fiber collecting made it possible to prepare yarn from nanofibres. Consequently, the yarns were used for producing plain weave fabric manually. Some characteristics of the yarn, such as diameter and its distribution along the yarn, specific density, thin and thick places were assessed using image processing technique. Also, characteristics of fabric appearances were investigated.展开更多
In search of effective and stable bifunctional electrocatalyst for electrocatalytic water splitting is still a major challenge for the highly efficient H_(2) production.Here,we reported a facile strategy to design hig...In search of effective and stable bifunctional electrocatalyst for electrocatalytic water splitting is still a major challenge for the highly efficient H_(2) production.Here,we reported a facile strategy to design high-indexed Cu_(3)Pd_(13)_S_(7) nanoparticles(NPs)in situ synthesized on the three-dimensional(3D)carbon nanofibers(CNFs)by combining electrospinning and chemical vapor deposition(CVD)technology.The high-index facets with abundant active sites,the 3D architecture CNFs with high specific surface area and synergistic effect of Cu-Pd-S bonds with strong electron couplings together promote the elec-trocatalytic performance.The Cu_(3)Pd_(13)_S_(7)/CNFs shows excellent electrocatalytic activity with low overpotentials of 52 mV(10 mA cm^(−2))for hydrogen evolution reaction(HER)and 240 mV(10 mA cm^(−2))for oxygen evolution reaction(OER).The excellent protection of Cu_(3)Pd_(13)_S_(7) by CNFs from aggregation and electrolyte corrosion lead to the high stability of Cu_(3)Pd_(13)_S_(7)/CNFs under acidic and alkaline conditions.展开更多
Improving the electron/ion transport ability and alleviating expansion during charging/discharging processes are vital for lithium-ion batteries(LIBs).In this work,a three-dimensional anode was fabricated using conduc...Improving the electron/ion transport ability and alleviating expansion during charging/discharging processes are vital for lithium-ion batteries(LIBs).In this work,a three-dimensional anode was fabricated using conductive hollow carbon-based nano tubes interpenetrated MXene architecture by directing the assembly of flexible electrospun hollow copper/carbon nanotubes and rigid Ti_(3)C_(2)T_(x) MXene nanosheets.The introduction of copper into carbon matrix leads to an improvement of lithium storage owing to the increase of disorder graphite.Additionally,the unique structure of the fabricated electrode provides a cross-network for fast electron diffusion by preventing the stack of nanotubes and MXene nanosheets.Consequently,the optimized electrode exhibits a high initial capacity of 424.45mAh·g^(-1) and maintains at 378.05 mAh·g^(-1) with a current density of 5 A·g^(-1) after 1000 cycles.This strategy of structural and chemical optimization provides new ideas for developing high-performance and durable electrochemical energy storage devices in the future.展开更多
Doping of titanium dioxide nanofibers by silver nanoparticles revealed distinct improvement in the photocatalytic activity;however other influences have not been investigated. In this work, effect of sliver-doping on ...Doping of titanium dioxide nanofibers by silver nanoparticles revealed distinct improvement in the photocatalytic activity;however other influences have not been investigated. In this work, effect of sliver-doping on the crystal structure, the nanofibrous morphology as well as the photocatalytic activity of titanium oxide nanofibers has been studied. Silver-doped TiO2 nanofibers having different silver contents were prepared by calcination of electrospun nanofiber mats consisting of silver nitrate, titanium isopropoxide and poly(vinyl acetate) at 600℃. The results affirmed formation of silver-doped TiO2 nanofibers composed of anatase and rutile when the silver nitrate content in the original electrospun solution was more than 3 wt%. The rutile phase content was directly proportional with the AgNO3 concentration in the electrospun solution. Negative impact of the silver-doping on the nanofibrous morphology was observed as increase the silver content caused to decrease the aspect ratio, i.e. producing nanorods rather nanofibers. However, silver-doping leads to modify the surface roughness. Study of the photocatalytic degradation of methylene blue dye clarified that increase the silver content strongly enhances the dye oxidation process.展开更多
Polymeric nanofiber non-woven materials produced by electrospinning have extremely high sur-face-to-mass (or volume) ratio and a porous structure with excellent pore-interconnectivity. These characteristics plus the f...Polymeric nanofiber non-woven materials produced by electrospinning have extremely high sur-face-to-mass (or volume) ratio and a porous structure with excellent pore-interconnectivity. These characteristics plus the functionalities and surface chemistry of the polymer itself impart the nanofi-bers with desirable properties for a range of advanced applications. This review summarizes the recent progress in electrospun nanofibers, with an emphasis on their applications.展开更多
基金supported by JST SPRING,Grant Number JPMJSP2144(Shinshu University).
文摘Owing to the robust scalability,ease of control and substantial industrial applications,the utilization of electrospinning technology to produce piezoelectric nanofiber materials demonstrates a significant potential in the development of wearable products including flexible wearable sensors.However,it is unfortunate that the attainment of high-performance piezoelec-tric materials through this method remains a challenging task.Herein,a high-performance composite nanofiber membrane with a coherent and uniformly dispersed two-dimensional network topology composed of polyvinylidene fluoride(PVDF)/dopamine(DA)nanofiber membranes and ultrafine PVDF/DA nanofibers was successfully fabricated by the electrospinning technique.Based on the evidence obtained from simulations,experimental and theoretical results,it was confirmed that the unique structure of the nanofiber membrane significantly enhances the piezoelectric performance.The present PVDF/DA composite nanofibers demonstrated a remarkable piezoelectric performance such as a wide response range(1.5–40 N),high sensitivity to weak forces(0–4 N,7.29 V N^(-1)),and outstanding operational durability.Furthermore,the potential application of the present PVDF/DA membrane as a flexible wearable sensor for monitoring human motion and subtle physiological signals has also been validated.This work not only introduces a novel strategy for the application of electrospun nanofibers in sensors but also provides new insights into high-performance piezoelectric materials.
基金National Natural Science Foundation of China (52103061)Young Elite Scientist Sponsorship Program by China Association for Science and Technology (YESS20220298)+2 种基金Tianjin Enterprise Science and Technology Commissioner Project (23YDTPJC00400)China Postdoctoral Science Foundation (2021T140419, 2022M711959)State Key Laboratory of Membrane and Membrane Separation, Tiangong University。
文摘Flexible wearable batteries are widely used in smartwatches, foldable phones, and fitness trackers due to their thinness and small size. Zinc-based batteries have the advantages of low cost, high safety, and ecofriendliness, which are considered to be the best alternative to flexible lithium-ion batteries(LIBs).Therefore, wearable flexible zinc-ion batteries(FZIBs) have attracted considerable interest as a promising energy storage device. Electrospun nanofibers(ESNFs) have great potential for application in wearable FZIBs due to their low density, high porosity, large specific surface area, and flexibility. Moreover, electrospinning technology can achieve the versatility of nanofibers through structural design and incorporation of other multifunctional materials. This paper reviews a wide range of applications of electrospinning in FZIBs, mainly in terms of cathode, anode, separator, polymer electrolyte, and all-inone flexible batteries. Firstly, the electrospinning device, principles, and influencing parameters are briefly described, showing its positive impact on FZIBs. Subsequently, the energy storage principles and electrode configurations of FZIBs are described, and some of the common problems of the batteries are illustrated, including zinc anode dendrite growth, corrosion, cathode structure collapse, and poor electrical conductivity. This is followed by a comprehensive overview of research progress on the individual components of FZIBs(cathode, anode, separator, and polymer electrolyte) from the perspective of electrostatically spun fiber materials and an in-depth study of all-in-one flexible batteries. Finally, the challenges and future development of FZIBs are individually concluded and look forward. We hope that this work will provide new ideas and avenues for the development of advanced energy technologies and smart wearable systems.
基金the financial support from the National Natural Science Foundation of China(Grant nos.21506210 and 51361135701)
文摘Ultrathin free-standing electrospun carbon nanofiber web（ECNFW） used for the electrodes of the vanadium flow battery（VFB） has been fabricated by the electrospinning technique followed by the carbonization process in this study to reduce the ohmic polarization of the VFB. The microstructure, surface chemistry and electrochemical performance of ECNFW carbonized at various temperatures from 800 to 1400 °C have been investigated. The results show that ECNFW carbonized at 1100 °C exhibits the highest electrocatalytic activity toward the V;/V;redox reaction, and its electrocatalytic activity decreases along with the increase of carbonization temperature due to the drooping of the surface functional groups.While for the VO;/VO;redox couple, the electrocatalytic activity of ECNFW carbonized above 1100 °C barely changes as the carbonization temperature rises. It indicates that the surface functional groups could function as the reaction sites for the V;/V;redox couple, but have not any catalytic effect for the VO;/VO;redox couple. And the single cell test result suggests that ECNFW carbonized at 1100 °C is a promising material as the VFB electrode and the VFB with ECNFW electrodes obtains a super low internal resistance of 250 mΩ cm;.
基金supported by National Natural Science Foundation of China(No.22303057)Fundamental Research Funds for Central Universities.
文摘Fuel cells,rechargeable metal–air batteries,metal-ion batteries,and supercapacitors have been regarded as prospective energy sources technologies to replace the fossil energy.Moreover,electrochemical sensors also have been successfully developed as promising platforms for detecting pollutants,drug analysis,and healthcare monitoring.Electrospinning is a scalable and suitable technique to design and fabricate diverse nanofibers and their nanocomposites for key components in electrochemical applications.Herein,a comprehensive review of electrospinning,from the technological innovations to the novel electrospun composite nanofibers,is provided.More importantly,the recent advances on the diverse components of electrochemical devices are highlighted,followed with the detailed discussion about the corresponding enhancement mechanism based on the electrospun nanomaterials.Finally,the currently faced challenges on the fabrication of electrospun nanomaterials are raised and a brief perspective for the future development of electrospun nanomaterials-based electrochemical applications is prospected.
文摘Nowadays, while human requirements are extending, producing nanofibers and nanofiber based products are progressing rapidly. Nanofibers have received considerable study in recent years using various polymers and methods. PAN (Polyacrylonitryle) nanofibers have shown a great potential in producing nanofibers and nanofibre yarn as precursor polymers for making high performance carbon fiber. There is a lack of information about yarn and woven fabrics made out of nanofibers. Current research is aiming to manufacture yarn using well-known electrospinning technique and converting it to woven fabric. A continuous yarn was produced by changing production parameters and using simultaneous twisting and collecting. Values of twist and rate of fiber collecting made it possible to prepare yarn from nanofibres. Consequently, the yarns were used for producing plain weave fabric manually. Some characteristics of the yarn, such as diameter and its distribution along the yarn, specific density, thin and thick places were assessed using image processing technique. Also, characteristics of fabric appearances were investigated.
基金supported by the National Natural Science Foundation of China(NSFC)(Grant nos.51803077,52073124)Natural Science Foundation of Jiangsu Province(Grant nos.BK20180627)+3 种基金Postdoctoral Science Foundation of China(2018M630517,2019T120389)the MOE and SAFEA,111 Project(B13025)the national first-class discipline program of Light Industry Technology and Engineering(LITE2018-19)the Fundamental Research Funds for the Central Universities.
文摘In search of effective and stable bifunctional electrocatalyst for electrocatalytic water splitting is still a major challenge for the highly efficient H_(2) production.Here,we reported a facile strategy to design high-indexed Cu_(3)Pd_(13)_S_(7) nanoparticles(NPs)in situ synthesized on the three-dimensional(3D)carbon nanofibers(CNFs)by combining electrospinning and chemical vapor deposition(CVD)technology.The high-index facets with abundant active sites,the 3D architecture CNFs with high specific surface area and synergistic effect of Cu-Pd-S bonds with strong electron couplings together promote the elec-trocatalytic performance.The Cu_(3)Pd_(13)_S_(7)/CNFs shows excellent electrocatalytic activity with low overpotentials of 52 mV(10 mA cm^(−2))for hydrogen evolution reaction(HER)and 240 mV(10 mA cm^(−2))for oxygen evolution reaction(OER).The excellent protection of Cu_(3)Pd_(13)_S_(7) by CNFs from aggregation and electrolyte corrosion lead to the high stability of Cu_(3)Pd_(13)_S_(7)/CNFs under acidic and alkaline conditions.
基金financially supported by the National Natural Science Foundation of China (Nos. 22005012 and 22105059)the Talent Introduction Program of Hebei Agricultural University (No. YJ201810)+5 种基金the Youth Top-notch Talent Foundation of Hebei Provincial Universities (No. BJK2022023)Self-deployed Projects of Ganjiang Innovation Academy, Chinese Academy of Sciencesfunded by the Natural Science Foundation of Hebei Province (No. B2019204009)supported by Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province (No. ZD05)the Interdisciplinary Research Project for Young Teachers of USTB (No. FRF-IDRY-21-015)the Fundamental Research Funds for the Central Universities of USTB。
文摘Improving the electron/ion transport ability and alleviating expansion during charging/discharging processes are vital for lithium-ion batteries(LIBs).In this work,a three-dimensional anode was fabricated using conductive hollow carbon-based nano tubes interpenetrated MXene architecture by directing the assembly of flexible electrospun hollow copper/carbon nanotubes and rigid Ti_(3)C_(2)T_(x) MXene nanosheets.The introduction of copper into carbon matrix leads to an improvement of lithium storage owing to the increase of disorder graphite.Additionally,the unique structure of the fabricated electrode provides a cross-network for fast electron diffusion by preventing the stack of nanotubes and MXene nanosheets.Consequently,the optimized electrode exhibits a high initial capacity of 424.45mAh·g^(-1) and maintains at 378.05 mAh·g^(-1) with a current density of 5 A·g^(-1) after 1000 cycles.This strategy of structural and chemical optimization provides new ideas for developing high-performance and durable electrochemical energy storage devices in the future.
文摘Doping of titanium dioxide nanofibers by silver nanoparticles revealed distinct improvement in the photocatalytic activity;however other influences have not been investigated. In this work, effect of sliver-doping on the crystal structure, the nanofibrous morphology as well as the photocatalytic activity of titanium oxide nanofibers has been studied. Silver-doped TiO2 nanofibers having different silver contents were prepared by calcination of electrospun nanofiber mats consisting of silver nitrate, titanium isopropoxide and poly(vinyl acetate) at 600℃. The results affirmed formation of silver-doped TiO2 nanofibers composed of anatase and rutile when the silver nitrate content in the original electrospun solution was more than 3 wt%. The rutile phase content was directly proportional with the AgNO3 concentration in the electrospun solution. Negative impact of the silver-doping on the nanofibrous morphology was observed as increase the silver content caused to decrease the aspect ratio, i.e. producing nanorods rather nanofibers. However, silver-doping leads to modify the surface roughness. Study of the photocatalytic degradation of methylene blue dye clarified that increase the silver content strongly enhances the dye oxidation process.
文摘Polymeric nanofiber non-woven materials produced by electrospinning have extremely high sur-face-to-mass (or volume) ratio and a porous structure with excellent pore-interconnectivity. These characteristics plus the functionalities and surface chemistry of the polymer itself impart the nanofi-bers with desirable properties for a range of advanced applications. This review summarizes the recent progress in electrospun nanofibers, with an emphasis on their applications.
