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Highly sensitive piezoresistive and thermally responsive fibrous networks from the in situ growth of pedot on MWCNT-decorated electrospun PU fibers for pressure and temperature sensing

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Microsystems & Nanoengineering 2023年第5期9卷 73-85页

作者： Yunyun Luo Libo Zhao Guoxi Luo Linxi Dong Yong Xia Min Li Ziping Li Kaifei Wang Ryutaro Maeda Zhuangde Jiang State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesXi’an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and SystemXi’an Jiaotong UniversityXi’anChina School of Mechanical Engineering Xi’an Jiaotong UniversityXi’anChina Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing YantaiChina Ministry of Education Engineering Research Center of Smart Microsensors and Microsystems College of Electronics and InformationHangzhou Dianzi UniversityHangzhouChina Department of Emergency The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anChina

Flexible electronics have demonstrated various strategies to enhance the sensory ability for tactile perception and wearable physiological *** microstructures have attracted much interest because of their excellent mechanical properties and ***,a structurally robust fibrous mat was first fabricated by electrospinning,followed by a sequential process of functionalization utilizing ultrasonication treatment and in situ polymerization *** polyurethane(PU)microfibers were anchored with multi-walled carbon nanotubes(MWCNTs)to form conductive paths along each fiber by a scalable ultrasonic cavitation treatment in an MWCNT ***,a layer of poly(3,4-ethylene dioxythiophene)(pedot)was grown on the surface of PU fibers decorated with MWCNTs to enhance the conductive conjunctions of *** to the superior electromechanical behaviors and mechanical reinforcement of pedot,the pedot/MWCNT@PU mat-based device exhibits a wide working range(0–70 kPa),high sensitivity(1.6 kPa−1),and good mechanical robustness(over 18,000 cycles).The pedot/MWCNT@PU mat-based sensor also demonstrates a good linear response to different temperature variations because of the thermoelectricity of the pedot/MWCNT *** novel strategy for the fabrication of multifunctional fibrous mats provides a promising opportunity for future applications for high-performance wearable devices.

关键词： fibers pedot conductive

Intrinsic thermal stability of inverted perovskite solar cells based on electrochemical deposited pedot

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Journal of Energy Chemistry 2023年第8期83卷 445-453,I0011页

作者： Congtan Zhu Jing Gao Tian Chen Xueyi Guo Ying Yang School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina Laboratory of Photonics and Interfaces Ecole Polytechnique Fédérale de Lausane Lausanne 1015witzeland

Thermal stability of perovskite materials is an issue impairing the long-term operation of inverted perovskite solar cells(PSCs). Herein, the thermal attenuation mechanism of the MAPb I3films that deposited on two different hole transport layers(HTL), poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(pedot:PSS) and poly(3,4-ethylenedioxythiophene)(pedot), is comprehensively studied by applying a heat treatment at 85℃. The thermal stress causes the mutual ions migration of I, Pb and Ag through the device, which leads to the thermal decomposition of perovskite to form Pb I2. Interestingly, we find that I ions tend to migrate more towards electron transport layer(ETL) during heating, which is different with the observation of I ions migration towards HTL when bias pressure is applied. Moreover, the use of electrochemical deposited pedot as HTL significantly decreases the defect density of MAPb I3films as compared to pedot:PSS supported one. The electrochemical deposition pedot has good carrier mobility and low acidity, which avoids the drawbacks of aqueous pedot:PSS. Accordingly, the inverted PSCs based on pedot show superior durability than that with pedot:PSS. Our results reveal detailed degradation routes of a new kind of inverted PSCs which can contribute to the understanding of the failure of thermal-aged inverted PSCs.

关键词： Inverted perovskite solarcells CH_(3)NH_(3)Pbl_(3) Thermal stability Electrochemical deposition pedot

Kinetics and thermodynamic studies of Methyl Orange removal by polyvinylidene fluoride-pedot mats

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Journal of Environmental Sciences 2021年第2期33卷 62-73页

作者： Romario J.da Silva Lizeth Carolina Mojica-Sanchez Filipe D.S.Gorza Graciela C.Pedro Bruna G.Maciel Gabriela P.Ratkovski Herica D.daRocha Kamila T.O.do Nascimento Juan CMedina-Llamas Alicia E.Chavez-Guajardo Jose J.Alcaraz-Espinoza Celso P.de Melo Program a de Pos-Graduagao em Ciencia de Materials U niversidade Federal de Pernambuco50670-901 RecifePEBrazil Departamento de Ffsica Uniuersidade Federal de Pemambiico50670-901 Reci/ePEBrazil Centro de Estudios Cientificosy Tecnologicos No.18 Instituto Politecnico Nacional98160 ZacatecasZacMexico Unidad Academica de Ciencias de la Tierra Uniuersidad Aut6noma de Zacatecas98058 ZacatecasZacMexico Departamento de Quimica Universidad Autonoma Metropolitana09340Ciudad de MexicoMexico

We report the preparation of poly(3,4-ethylene dioxythiophene)(pedot)-modified polyvinylidene fluoride electrospun fibers and their use as a novel adsorbent material for the removal of the anionic dye Methyl Orange(MO)from aqueous *** novel adsorbent material can be used to selectively remove MO on a wide p H range(3.0-10.0),with a maximum capacity of 143.8 mg/g at p H *** used in a recirculating filtration system,the maximum absorption capacity was reached in a shorter time(20 min)than that observed for batch mode experiments(360 min).Based on the analyses of the kinetics and adsorption isotherm data,one can conclude that the predominant mechanism of interaction between the membrane and the dissolved dye molecules is ***,considering the estimated values for the Gibbs energy,and entropy and enthalpy changes,it was established that the adsorption process is spontaneous and occurs in an endothermic *** good mechanical and environmental stability of these membranes allowed their use in at least 20 consecutive adsorption/desorption cycles,without significant loss of their *** suggest that the physical-chemical characteristics of pedot make these hybrid mats a promising adsorbent material for use in water remediation protocols and effluent treatment systems.

关键词： Electrospinning Composite mats pedot Pvdf mats Dye removal Water remediation

High-performance supercapacitors based on free-standing SiC@pedot nanowires with robust cycling stability

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Journal of Energy Chemistry 2022年第3期31卷 30-37,I0002页

作者： Wenna Liu Xiaoxiao Li Weijun Li Yumin Ye Hong Wang Peipei Su Weiyou Yang Ya Yang Ningbo Key Laboratory of Specialty Polymers School of Materials Science and Chemical EngineeringNingbo UniversityNingbo 315211ZhejiangChina Institute of Materials Ningbo University of TechnologyNingbo 315016ZhejiangChina CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China

Conductive polymers as one of the candidate materials with pseudocapacitor behavior have inspired wide attentions,because of their high conductivity,fexibility,low cost and excellent ***,the intrinsically poor cycling stability induced by the volume change over the doping/dedoping redox process limits their practical ***,we report the exploration of electrodes with robust cycling capacity for supercapacitors(SCs),which are rationally designed by coating conductive poly(3,4-ethylenedioxythiophene)(pedot)around free-standing SiC nanowires using an all-dry oxidative chemical vaper deposition(oCVD)*** as-constructed SiC@pedot nanowire architecture enables a specific capacitance of 26.53 m F/cm^(2)at 0.2 m A/cm^(2),which is~370%to that of SiC nanowire counterpart(7.04 m F/cm^(2)).Moreover,their aqueous-based SCs exhibit robust cycling stability with104%capacity retention after 10000 cycles,which is among the highest values achieved for pedotbased SCs.

关键词： pedot SiC nanowires Supercapacitor Energy storage Cycling stability

pedot-based thermoelectric composites:Preparation,mechanism and applications

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Chinese Chemical Letters 2024年第9期35卷 54-64页

作者： Jia Fu Shilong Zhang Lirong Liang Chunyu Du Zhenqiang Ye Guangming Chen College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055China

Thermoelectric(TE)materials enable effective and direct energy conversions between heat and electricity,displaying wide applications including waste/low-grade heat harvesting,local cooling,sensing and wearable *** the recently-developed organic and composite TE materials,poly(3,4-ethylenedioxythiophene)(pedot)is perhaps the most successful and frequently reported ***,we aim to review the recent advances of the synthesis,mechanism and applications of pedot-based TE ***,the research background and the history of TE materials are briefly ***,the synthesis and TE performance of pedot-based composites are summarized according to the sequence of films,hydrogels/aerogels and fibers/***,the mechanism,structure and property are *** that,the recent development and its applications of power generation and sensing are ***,we provide an outlook on the prospects and the challenges of pedot-based TE composites.

关键词： Thermoelectric pedot Composites Preparation Mechanism Application

Constructing oxygen deficiency-rich V_(2)O_(3)@pedot cathode for high-performance aqueous zinc-ion batteries

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Rare Metals 2024年第2期43卷 635-646页

作者： Dong-Fei Sun Zi-Juan Wang Tian Tian Xin Yu Dan-Dan Yu Xiao-Zhong Zhou Guo-Fu Ma Zi-Qiang Lei Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education Key Laboratory of Eco-environmental Polymer Materials of Gansu ProvinceSchool of College of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou730070China

Aqueous zinc-ion batteries(AZIBs)have attracted widespread attention due to the advantages of high safety and environmental *** V_(2)O_(3) is a promising cathode,the strong electrostatic interaction between Zn^(2+) and V_(2)O_(3) crystal,and the sluggish reaction kinetics still limit their application in ***,the oxygen defects rich V_(2)O_(3) with conducive poly(3,4-ethylenedioxythiophene)(pedot)shell(V_(2)O_(3)-Od@pedot)was fabricated for AZIBs by combining the sulfur-assisted thermal reduction and in-situ polymerization *** introduced oxygen vacancies of V_(2)O_(3)–Od@pedot weaken the electrostatic interaction between Zn^(2+) and the host material,improving the interfacial electron transport,while the pedot coating enhances the structural stability and conductivity of V_(2)O_(3),thus accelerating the reaction *** on the advantages,V_(2)O_(3)–Od@pedot electrode delivers a reversible capacity of 495 mAh·g^(−1) at 0.1 A·g^(−1),good rate capability(189 mAh·g^(−1)at 8.0 A·g^(−1)),and an impressive cycling stability with 90.1%capacity retention over 1000 cycles at 8.0 A·g^(−1).The strategy may provide a path for exploiting the other materials for high performance AZIBs.

关键词： Oxygen defects V_(2)O_(3) pedot Electrochemical self-optimization Aqueous zinc-ion batteries

Electro-catalytic role of insulator/conductor interface in Mg O/pedot composite electrodes for dye-sensitized solar cells

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Science China Chemistry 2015年第1期58卷 101-106页

作者： Hui Wang Yunhang Hu Department of Materials Science and Engineering Michigan Technological University

Mg O has not been explored as a counter electrode materials for dye-sensitized solar cells(DSSCs)due to its lack of electrical ***,herein,it is reported that Mg O insulator with conductive poly(3,4-ethylenedioxythiophene):polysty-renesulfonate(pedot:PSS)exhibited excellent performance as a counter electrode for DSSCs,leading to a high power conversion efficiency of 7.45%.Furthermore,it was revealed that the interface between Mg O and pedot:PSS plays an important electro-catalytic role in the Mg O/pedot composite counter electrodes.

关键词： MgO DSSC counter electrode pedot

Fabrication of pedot/PSS-ZnO nanowire by selfassembly method under vacuum condition

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Chinese Science Bulletin 2005年第20期50卷 2288-2290页

作者： QI Yingqun WANG Tiejun HU Xiujie CHEN Ping Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100101 China

In this paper, cable-like pedot/PSS-ZnO nanowires are successfully fabricated under vacuum condi- tion by self-assembly of the pedot/PSS-ZnO composite initially prepared via sol-gel method. Characterized by TEM and EDX, the nanowire is found to have a polycrystalline ZnO inner core that is sheathed by the pedot/PSS blends and the nanowire has an outer diameter of ca. 100 nm. The results also indicate that the morphology of pedot/PSS- ZnO nanocomposite is greatly influenced by external vac- uum condition and aging time. The feasible and simple ap- proach that we have developed provides a new strategy for the synthesis of novel one-dimensional nanocomposites.

关键词：电缆纳米金属线自集合法真空条件氧化锌 pedot

Efficient and Air-Stable Planar Perovskite Solar Cells Formed on Graphene-Oxide-Modified pedot:PSS Hole Transport Layer

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Nano-Micro Letters 2017年第4期9卷 19-29页

作者： Hui Luo Xuanhuai Lin Xian Hou Likun Pan Sumei Huang Xiaohong Chen Engineering Research Center for Nanophotonics and Advanced Instrument Ministry of Educationand School of Physics and Materials ScienceEast China Normal UniversityShanghai 200062People’s Republic of China

As a hole transport layer, pedot:PSS usually limits the stability and efficiency of perovskite solar cells(PSCs) due to its hygroscopic nature and inability to block electrons. Here, a graphene-oxide(GO)-modified pedot:PSS hole transport layer was fabricated by spin-coating a GO solution onto the pedot:PSS surface. PSCs fabricated on a GO-modified pedot:PSS layer exhibited a power conversion efficiency(PCE) of 15.34%, which is higher than 11.90% of PSCs with the pedot:PSS ***, the stability of the PSCs was significantly improved, with the PCE remaining at 83.5% of the initial PCE values after aging for 39 days in air. The hygroscopic PSS material at the pedot:PSS surface was partlyremoved during spin-coating with the GO solution, which improves the moisture resistance and decreases the contact barrier between the hole transport layer and perovskite layer. The scattered distribution of the GO at the pedot:PSS surface exhibits superior wettability, which helps to form a high-quality perovskite layer with better crystallinity and fewer pin holes. Furthermore, the hole extraction selectivity of the GO further inhibits the carrier recombination at the interface between the perovskite and pedot:PSS layers. Therefore, the cooperative interactions of these factors greatly improve the light absorption of the perovskite layer, the carrier transport and collection abilities of the PSCs, and especially the stability of the cells.

关键词： Perovskite solar cells Moisture resistance Wettability Stability Graphene oxide pedot PSS