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Plasma Science and Technology 2023年第7期25卷 90-96页

作者：高尔豪郭可盈金琦韩丽李宁吴祖良姚水良 School of Environmental Science and Engineering Changzhou UniversityChangzhou 213164People’s Republic of China Key Laboratory of Advanced Plasma Catalysis Engineering for China Petrochemical Industry Changzhou 213164People’s Republic of China School of Petrochemical Engineering Changzhou UniversityChangzhou 213164People’s Republic of China

Ozone(O_(3)) generated by a dielectric barrier discharge(DBD) is widely used in various industrial processes. In this study, NaCl aqueous solution was used as a novel electric power transmission electrode in a DBD reactor(instead of a traditional metal electrode) for highly efficient ozone generation. The results demonstrated that a high O_(3) yield of 242 g k Wh^(-1) with a concentration of 14.6 g m^(-3)O_(3) was achieved. The power transmission mechanism works because NaCl aqueous solution behaves as a capacitor when an alternating pulse voltage below 8 k Hz is used.Compared with the resistance of the discharge barrier and discharge space, the resistance of NaCl aqueous solution can be ignored, which ensures that O_(3) is generated efficiently. It is expected that O_(3) generation using NaCl aqueous solution as a novel electrode in a DBD reactor could be an alternative technology with good application prospects.

关键词： ozone dielectric barrier discharge(DBD) electrode NaCl aqueous solution

Functional data-driven framework for fast forecasting of electrode slurry rheology simulated by molecular dynamics

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npj Computational Materials 2022年第1期8卷 1524-1532页

作者： Marc Duquesnoy Teo Lombardo Fernando Caro Florent Haudiquez Alain C.Ngandjong Jiahui Xu Hassan Oularbi Alejandro A.Franco Laboratoire de Réactivitéet Chimie des Solides(LRCS) UMR CNRS 7314Universitéde Picardie Jules VerneHub de l’Energie15rue Baudelocque80039AmiensCedexFrance ALISTORE-European Research Institute FR CNRS 3104Hub de l’Energie15rue Baudelocque80039AmiensCedexFrance Reseau sur le Stockage Electrochimique de l’Energie(RS2E) FR CNRS 3459Hub de l’Energie15rue Baudelocque80039AmiensCedexFrance Institut Universitaire de France 103 Boulevard Saint Michel75005ParisFrance

The computational simulation of the manufacturing process of lithium-ion battery composite electrodes based on mechanistic models allows capturing the influence of manufacturing parameters on electrode properties.However,ensuring that these properties match with experimental data is typically computationally expensive.In this work,we tackled this costly procedure by proposing a functional data-driven framework,aiming first to retrieve the early numerical values calculated from a molecular dynamics simulation to predict if the observable being calculated is prone to match with our range of experimental values,and in a second step,recover additional values of the ongoing simulation to predict its final result.We demonstrated this approach in the context of the calculation of electrode slurries viscosities.We report that for various electrode chemistries,the expected mechanistic simulation results can be obtained 11 times faster with respect to the complete simulations,while being accurate with a R^(2)_(score) equals to 0.96.

关键词： properties electrode dynamics

Effect of electrode and oxide properties on the filament kinetics during electroforming in metal-oxide-based memories

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npj Computational Materials 2022年第1期8卷 717-726页

作者： Kena Zhang Yao Ren Panchapakesan Ganesh Ye Cao Department of Materials Science and Engineering University of Texas at ArlingtonArlingtonTX76019USA Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTN37831USA

We developed a physical model to fundamentally understand the conductive filament(CF)formation and growth behavior in the switching layer during electroforming process in the metal-oxide-based resistive random-access memories(RRAM).The effects of the electrode and oxide layer properties on the CF morphology evolution,current-voltage characteristic,local temperature,and electrical potential distribution have been systematically explored.It is found that choosing active electrodes with lower oxygen vacancy formation energy and oxides with small Lorenz number(ratio of thermal and electrical conductivity)enables CF formation at a smaller electroforming voltage and creates a CF with more homogeneous morphology.This work advances our understanding of the kinetic behaviors of the CF formation and growth during the electroforming process and could potentially guide the oxide and electrode materials selection to realize a more stable and functional RRAM.

关键词： electrode oxide kinetics

Micro-nano structural electrode architecture for high power energy storage

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Journal of Semiconductors 2023年第5期44卷 1-6页

作者： Xin Chao Chengzhan Yan Huaping Zhao Zhijie Wang Yong Lei Institute of Nanochemistry and Nanobiology School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China Fachgebiet Angewandte Nanophysik Institut für Physik&IMN MacroNanoTechnische Universität IlmenauIlmenau98693Germany Key Laboratory of Semiconductor Materials Science Beijing Key Laboratory of Low Dimensional Semiconductor Materials and DevicesInstitute of SemiconductorsChinese Academy of SciencesBeijing 100083China

The necessity and superiorities of micro-nano structural electrodes toward high power:Electrochemical energy storage(EES)technologies have achieved great success in portable electronics and electric vehicles owing to their environmental friendliness and cost effectiveness.With the promotional concepts such as the Internet of Things and ultra-high efficiency self-powered systems in recent years,there are substantial demand for superior EES systems,including but not limited to high-performance,miniaturization and multifunction[1−4].In a particular EES cell,active materials are carried by electrodes as the basic building blocks of energy storage or release.Material innovation(includes composition,structure,size and morphology)has revealed remarkable energy density,power density and lifespan for associated devices in the lab setting of low mass loading slurry-coating electrodes[5].

关键词： structural power electrode

Preparation optimization of multilayer-structured SnO_2–Sb–Ce/Ti electrode for efficient electrocatalytic oxidation of tetracycline in water

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Chinese Journal of Chemical Engineering 2018年第12期26卷 2622-2627页

作者： Kun Yang Yuyu Liu Jiawen Liu Jinli Qiao Institute of Sustainable Energy/College of Science Shanghai UniversityShanghai 200444China State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry College of Environmental Science and EngineeringDonghua UniversityShanghai 201620China ShanghaiJinyuan Senior High School Shanghai 200333China

In this study, electrodeposition and thermal decomposition were alternatively used for the fabrication of a series of novel multilayer-structured SnO_2–Sb–Ce/Ti(SSCT) electrodes, and their physiochemical and electrochemical properties were investigated for electrochemical oxidation of tetracycline(TC) in aqueous medium.Experimentally, after the SnO_2–Sb–Ce(SSC) composite was electrodeposited for 120 s on the titanium substrate in aqueous solution, the outer thermal coatings composed of SSC were synthesized by a hydrothermal method.Both influences of electrodeposition time(T_(ed)) and thermal decomposition time(Ttd) were investigated to obtain the optimum preparation. It was found that when increasing T_(ed)to a certain extent a longer lifetime of electrode can be achieved, which was attributed to a more solid interlayer structure. A notable SSCTT_(ed),Ttdelectrode,i.e., SSCT3,10, which was prepared through three times of 120 s' electrodeposition(T_(ed)= 3) and ten times of thermal decomposition(Ttd= 10) obtained the highest oxygen evolution potential 3.141 V vs. SCE. In this selected electrode, when 10 mg·L^(-1) initial TC concentration was added to this wastewater, the highest color removal efficiency and mineralization rate of TC were 72.4% and 41.6%, respectively, with an applied electricity density of 20 m A·cm^(-2) and treatment time of 1 h. These results presented here demonstrate that the combined application of electrodeposition and thermal decomposition is effective in realization of enhanced electrocatalytic oxidation activity.

关键词： Multilayer structured electrode Nano-hollow sphere Antibiotics Electro-oxidation

High performance octahedral PtNi/C catalysts investigated from rotating disk electrode to membrane electrode assembly

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Nano Research 2019年第2期12卷 281-287页

作者： Bing Li Jue Wang Xin Gao Congwei Qin Daijun Yang Hong Lv Qiangfeng Xiao Cunman Zhang School of Automotive Studies & Clean Energy Automotive Engineering Center Tongji University (Jiading Campus) 4800 Caoan Road Shanghai 201804 China Department of Energy Technology Aalborg University Pon toppidanstraede 101 Aalborg 9220 Denmark

Octahedral PtNi/C catalysts have demonstrated superior catalytic performance in oxyge n reduction reacti on (ORR) over commercial Pt/C with rotating disk electrode (RDE). However, it is not trivial to translate such promising results to real-world membrane-electrode assembly (MEA). In this work, we have synthesized octahedral PtNi/C catalysts using poly(diallyldimethylammonium chloride)(PDDA) as a capping age nt and in vestigated their performance from RDE to MEA. In RDE, mass activity and specific activity of the optimized octahedral PtNi/C catalyst for oxygen reduction reaction (ORR) are nearly 19 and 28 times high of the state-of-the-art commercial Pt/C, respectively. At MEA level, the octahedral PtNi/C catalyst exhibits excelle nt power generation performa nee and durability paired with commercial Pt/C ano de. Its cell voltage at 1,000mA·cm^-2 reaches 0.712 V, and maximum power density is 881.6 mW·cm^-2 and its performance attenuation is also less, around 11.8% and 7% under galvanostatic condition of 1,000 mA·cm^-2 for 100 h. Such results are investiaged by thermodynamic analysis and fundametal performance modeling, which indicate the single cell performance can be further improved by reducing the size of PtNi/C catalyst agglomerates. Such encouraging results have demonstrated the feasibility to convey the superior performance of octahedral PtNi/C from RDE to MEA.

关键词： proton exchange membrane fuel cell (PEMFC) octahedral PtNi/C oxygen reduction reaction (ORR) durability membrane electrode assembly (MEA)

Effect of electrode Pt-loading and cathode flow-field plate type on the degradation of PEMFC

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Journal of Energy Chemistry 2019年第8期28卷 95-103,I0005页

作者： Lijuan Qu Zhiqiang Wang Xiaoqian Guo Wei Song Feng Xie Liang He Zhigang Shao Baolian Yi Fuel Cell System and Engineering Group Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023 Liaoning China University of Chinese Academy of Sciences Beijing 100049 China

The electrode Pt-loading has an effect on the number of active sites and the thickness of catalyst layer,which has huge influence on the mass transfer and water management during dynamic process in PEMFCs. In this study, membrane electrode assemblies with different Pt-loadings were prepared, and PEMFCs were assembled using those membrane electrode assemblies with traditional solid plate and water transport plate as cathode flow-field plates, respectively. The performance and electrochemical surface area of cells were characterized to evaluate the membrane electrode assemblies degradation after rapid currentvariation cycles. Scanning electron microscope and transmission electron microscope were used to investigate the decay of catalyst layers and Pt/C catalyst. With the increase of Pt-loading, the performance degradation of membrane electrode assemblies will be mitigated. But higher Pt-loading means thicker catalyst layer, which leads to a longer pathway of mass transfer, and it may result in carbon material corrosion in membrane electrode assemblies. The decay of Pt/C catalyst in cathode is mainly caused by the corrosion of carbon support, and the degradation of anode Pt/C catalyst is a consequence of migration and aggregation of Pt particles. And using water transport plate is beneficial to alleviating the age of cathode Pt/C catalyst.

关键词： Proton exchange membrane fuel cell electrode platinum loading Current-variation cycle Traditional solid plate Water transport plate

Modified carbon cloth as positive electrode with high electrochemical performance for vanadium redox flow batteries

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Journal of Energy Chemistry 2016年第4期25卷 720-725页

作者： Zhangxing He Zhongsheng Chen Wei Meng Yingqiao Jiang Gang Cheng Lei Dai Ling Wang Jiangxi Engineering Research Center of Process and Equipment for New Energy East China Institute of Technology School of Chemical Engineering North China University of Science and Technology

Carbon cloth modified by hydrothermal treatment in ammonia water is developed as the positive electrode with high electrochemical performance for vanadium redox flow batteries. The SEM shows that the treatment has no obvious influence on the morphology of carbon cloth. XPS measurements indicate that the nitrogenous functional groups can be introduced on the surface of carbon cloth successfully. The electrochemical performance of V(IV)/V(V) redox couple on the prepared electrode is evaluated with cyclic voltammetry and linear sweep voltammetry measurements. The N-doped carbon cloth exhibits outstanding electrochemical activity and reversibility toward V(IV)/V(V) redox couple. The rate constant of V(IV)/V(V) redox reaction on carbon cloth can increase to 2.27 x 10(-4) cm/s from 1.47 x 10(-4) cm/s after nitrogen doping. The cell using N-doped carbon cloth as positive electrode has larger discharge capacity and higher energy efficiency compared with the cell using pristine carbon cloth. The average energy efficiency of the cell using N-doped carbon cloth for 50 cycles at 30 mA/cm(2) is 87.8%, 4.3% larger than that of the cell using pristine carbon cloth. It indicates that the N-doped carbon cloth has a promise application prospect in vanadium redox flow batteries. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.

关键词： Vanadium redox flow batteries Carbon cloth electrode Kinetics Electrochemical performance

Emerging CoMn-LDH@MnO2 electrode materials assembled using nanosheets for flexible and foldable energy storage devices

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Journal of Energy Chemistry 2020年第6期29卷 67-73,I0003页

作者： Yue Zhao Jiafeng He Meizhen Dai Depeng Zhao Xiang Wu Baodan Liu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870LiaoningChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina

CoMn layered double hydroxides(CoMn-LDH)are promising electrode materials for supercapacitors because of their excellent cyclic stability.However,they possess relatively low capacitances.In this work,hybrid CoMn-LDH@MnO2 products grown on Ni foams were obtained through a facile hydrothermal method.The as-synthesized samples employed as electrodes deliver a specific capacitance of 2325.01 F g^-1 at 1 A g^-1.An assembled asymmetric supercapacitor using these products as positive electrodes shows a maximum energy density of 59.73 W h kg^-1 at 1000.09 W kg^-1.The prominent electrochemical performance of the as-prepared electrodes could be attributes to hierarchical structures.These findings suggest that hybrid structures might be potential alternatives for future flexible energy storage devices.

关键词： CoMn-LDH@MnO2 electrode Specific capacitance Flexible device Cyclic stability

Breaking 12% efficiency in flexible organic solar cells by using a composite electrode

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Science China Chemistry 2019年第7期62卷 851-858页

作者： Guang Zeng Jingwen Zhang Xiaobin Chen Hongwei Gu Yaowen Li Yongfang Li Laboratory of Advanced Optoelectronic Materials College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China College of Materials Science and Engineering Nanchang Hangkong University Nanchang 330063 China

The performance of flexible organic solar cells(OSCs)significantly relies on the quality of transparent flexible electrode.Here,we used silver nanowires(AgNWs)with various weight ratios to dope high-conductive poly(3,4-ethylenedioxythiophene):polystyrene sulfonate(PH1000)to optimize the optical and electronic properties of PH1000 film.A high-quality flexible composite electrode PET/Ag-mesh/PH1000:AgNWs-20 with smooth surface,a low sheet resistance of 6Ω/sq and a high transmittance of 86%at 550-nm wavelength was obtained by doping 20 wt%AgNWs to PH1000(PH1000:AgNWs-20).The flexible OSCs based on the PET/Ag-mesh/PH1000:AgNWs-20 electrode delivered a power conversion efficiency(PCE)of12.07%with an open circuit voltage(Voc)of 0.826 V,a short-circuit current density(Jsc)of 20.90 m A/cm2and a fill factor(FF)of69.87%,which is the highest reported PCE for the flexible indium-tin oxide(ITO)-free OSCs.This work demonstrated that the flexible composite electrodes of PET/Ag-mesh/PH1000:AgNWs are promising alternatives for the conventional PET/ITO electrode,and open a new avenue for developing high-performance flexible transparent electrode for optoelectronic devices.

关键词： flexible electrodes flexible organic solar cells silver nanowire composite electrode power conversion efficiency