Conducting polymers have achieved remarkable attentions owing to their exclusive characteristics,for instance,electrical conductivity,high ionic conductivity,visual transparency,and mechanical tractability.Surface and...Conducting polymers have achieved remarkable attentions owing to their exclusive characteristics,for instance,electrical conductivity,high ionic conductivity,visual transparency,and mechanical tractability.Surface and nanostructure engineering of conjugated conducting polymers offers an exceptional pathway to facilitate their implementation in a variety of scientific claims,comprising energy storage and production devices,flexible and wearable optoelectronic devices.A two-step tactic to assemble high-performance polypyrrole(PPy)-based microsupercapacitor(MSC)is utilized by transforming the current collectors to suppress structural pulverization and increase the adhesion of PPy,and then electrochemical co-deposition of PPy-CNT nanostructures on rGO@Au current collectors is performed.The resulting fine patterned MSC conveyed a high areal capacitance of 65.9 mF cm^(−2)(at a current density of 0.1 mA cm^(−2)),an exceptional cycling performance of retaining 79%capacitance after 10,000 charge/discharge cycles at 5 mA cm^(−2).Benefiting from the intermediate graphene,current collector free PPy-CNT@rGO flexible MSC is produced by a facile transfer method on a flexible substrate,which delivered an areal capacitance of 70.25 mF cm^(−2) at 0.1 mA cm^(−2) and retained 46%of the initial capacitance at a current density of 1.0 mA cm^(−2).The flexible MSC is utilized as a skin compatible capacitive micro-strain sensor with excellent electromechanochemical characteristics.展开更多
The demand for cost-effective and scalable manufacturing processes in flexible functional device fabrication has led to the exploration of novel materials and innovative fabrication techniques for wearable health moni...The demand for cost-effective and scalable manufacturing processes in flexible functional device fabrication has led to the exploration of novel materials and innovative fabrication techniques for wearable health monitoring systems.However,ultraviolet(UV)photodetectors,due to wide band gap responsive substance with complicated synthesis,always require an external power supply and suffer low response rates and slow response times.Here,we present a solution-processed,scalable,and ink-printed integrated UV photodetector based on granular-derived power-intercalated Bi_(2)O_(2)Se/Bi_(2)SeO_(5)heterostructure nanosheets,a promising two-dimensional(2D)semiconductor with notable optical and electrical properties.By employing fine and highly conductive MXene-Pt-Ni current collectors,Bi_(2)O_(2)Se/Bi_(2)SeO_(5)heterostructure UV photodetector demonstrates impressive performance in the UV spectral range,showcasing high responsivity and rapid photoresponse,with diverse applications from wearable electronics to environmental monitoring systems.The device exhibits a notable photocurrent on/off ratio and low dark current,with photocurrent density(I_(ph))of 2.2μA·cm^(-2)and detectivity(D*)of 3.31×10^(10)Jones,outperforming previously reported all-printed devices,highlighting its potential for low-power and high-performance applications.Moreover,integrating the photodetector into a printed electronics platform enables seamless incorporation into flexible and conformal systems,extending its utility in various form factors and applications.展开更多
The development of an efficient Pt-based electrocatalyst in acidic and alkaline electrolytes is of great significance to the field of electrocatalytic hydrogen evolution.Herein,we report a strategy for in situ growth ...The development of an efficient Pt-based electrocatalyst in acidic and alkaline electrolytes is of great significance to the field of electrocatalytic hydrogen evolution.Herein,we report a strategy for in situ growth of Pt_(3)Ni truncated octahedrons on Ti3C2Tx nanosheets and then obtain an ordered porous catalyst via a template method.Meanwhile,we use the finite element calculation to clarify the relationship between the component structure and performance and find that the performance of the spherical shell microstructure catalyst is higher than that of the disc structure catalyst,which is also verified by experiments.The experimental analysis shows that the ordered porous catalyst is conducive to enhancing electrocatalytic hydrogen evolution activity in acidic and alkaline electrolytes.In an acidic solution,the overpotential is 25 mV(10 mA·cm^(−2)),and the Tafel slope is 22.86 mV·dec−1.In an alkaline solution,the overpotential is 44.1 mV(10 mA·cm^(−2)),and the Tafel slope is 39.06 mV·dec−1.The synergistic coupling between Ti3C2Tx and Pt_(3)Ni nanoparticles improves the stability of the catalyst.The in situ growth strategy and design of microstructure with its correlation with catalytic performance represent critical steps toward the rational synthesis of catalysts with excellent catalytic activity.展开更多
基金support of the National Key R&D Program of China(Grant No.2021YFB3200701,2018YFA0208501)the National Natural Science Foundation of China(Grant No.52272098,21875260,21671193,91963212,51773206,21731001,22272182)Beijing Natural Science Foundation(No.2202069).
文摘Conducting polymers have achieved remarkable attentions owing to their exclusive characteristics,for instance,electrical conductivity,high ionic conductivity,visual transparency,and mechanical tractability.Surface and nanostructure engineering of conjugated conducting polymers offers an exceptional pathway to facilitate their implementation in a variety of scientific claims,comprising energy storage and production devices,flexible and wearable optoelectronic devices.A two-step tactic to assemble high-performance polypyrrole(PPy)-based microsupercapacitor(MSC)is utilized by transforming the current collectors to suppress structural pulverization and increase the adhesion of PPy,and then electrochemical co-deposition of PPy-CNT nanostructures on rGO@Au current collectors is performed.The resulting fine patterned MSC conveyed a high areal capacitance of 65.9 mF cm^(−2)(at a current density of 0.1 mA cm^(−2)),an exceptional cycling performance of retaining 79%capacitance after 10,000 charge/discharge cycles at 5 mA cm^(−2).Benefiting from the intermediate graphene,current collector free PPy-CNT@rGO flexible MSC is produced by a facile transfer method on a flexible substrate,which delivered an areal capacitance of 70.25 mF cm^(−2) at 0.1 mA cm^(−2) and retained 46%of the initial capacitance at a current density of 1.0 mA cm^(−2).The flexible MSC is utilized as a skin compatible capacitive micro-strain sensor with excellent electromechanochemical characteristics.
基金support of the National Natural Science Foundation of China(Nos.52272098,21875260,and W2433146)Beijing Natural Science Foundation(No.2202069)+1 种基金the Youth Talent Program of Sci-Tech Think TankWe also thank China Science and Technology Cloud and the support of Hongzhiwei Technology(Shanghai)Co.Ltd.,1599 Xinjinqiao Road,Pudong Shanghai,China.
文摘The demand for cost-effective and scalable manufacturing processes in flexible functional device fabrication has led to the exploration of novel materials and innovative fabrication techniques for wearable health monitoring systems.However,ultraviolet(UV)photodetectors,due to wide band gap responsive substance with complicated synthesis,always require an external power supply and suffer low response rates and slow response times.Here,we present a solution-processed,scalable,and ink-printed integrated UV photodetector based on granular-derived power-intercalated Bi_(2)O_(2)Se/Bi_(2)SeO_(5)heterostructure nanosheets,a promising two-dimensional(2D)semiconductor with notable optical and electrical properties.By employing fine and highly conductive MXene-Pt-Ni current collectors,Bi_(2)O_(2)Se/Bi_(2)SeO_(5)heterostructure UV photodetector demonstrates impressive performance in the UV spectral range,showcasing high responsivity and rapid photoresponse,with diverse applications from wearable electronics to environmental monitoring systems.The device exhibits a notable photocurrent on/off ratio and low dark current,with photocurrent density(I_(ph))of 2.2μA·cm^(-2)and detectivity(D*)of 3.31×10^(10)Jones,outperforming previously reported all-printed devices,highlighting its potential for low-power and high-performance applications.Moreover,integrating the photodetector into a printed electronics platform enables seamless incorporation into flexible and conformal systems,extending its utility in various form factors and applications.
基金Thanks for the financial support of the National Key R&D Program of China(Nos.2021YFB3200700 and 2016YFC1100502)the National Natural Science Foundation of China(Nos.21875260 and 21671193)+3 种基金Beijing Nature Science Foundation(No.2202069)Zhongguancun Open Laboratory Concept Verification Project(No.202205229)the Foundation of State Key Laboratory of Digital Manufacturing Equipment and Technology(No.DMETKF2022004)the China Science and Technology Cloud for calculation support.
文摘The development of an efficient Pt-based electrocatalyst in acidic and alkaline electrolytes is of great significance to the field of electrocatalytic hydrogen evolution.Herein,we report a strategy for in situ growth of Pt_(3)Ni truncated octahedrons on Ti3C2Tx nanosheets and then obtain an ordered porous catalyst via a template method.Meanwhile,we use the finite element calculation to clarify the relationship between the component structure and performance and find that the performance of the spherical shell microstructure catalyst is higher than that of the disc structure catalyst,which is also verified by experiments.The experimental analysis shows that the ordered porous catalyst is conducive to enhancing electrocatalytic hydrogen evolution activity in acidic and alkaline electrolytes.In an acidic solution,the overpotential is 25 mV(10 mA·cm^(−2)),and the Tafel slope is 22.86 mV·dec−1.In an alkaline solution,the overpotential is 44.1 mV(10 mA·cm^(−2)),and the Tafel slope is 39.06 mV·dec−1.The synergistic coupling between Ti3C2Tx and Pt_(3)Ni nanoparticles improves the stability of the catalyst.The in situ growth strategy and design of microstructure with its correlation with catalytic performance represent critical steps toward the rational synthesis of catalysts with excellent catalytic activity.
