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Electrochemical engineering approach of high performance solid-state flexible supercapacitor device based on chemically synthesized VS_2 nanoregime structure

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Journal of Energy Chemistry 2019年第4期28卷 79-88页

作者： Bidhan Pandit Lakshmana Kumar Bommineedi Babasaheb R.Sankapal Nano materials and Device Laboratory Department of Physics Visvesvaraya National Institute of Technology

Portable and furnished electronics appliances demand power efficient energy storage devices where electrochemical supercapacitors gain much more *** this concern,a simple,low-cost and industry scalable successive ionic layer adsorption and reaction(SILAR)approach has been adopted to deposit nanostructured VS_2onto flexible and light-weight stainless steel(SS)substrate towards supercapacitor *** nanocrystalline nature with hexagonal crystal structure has been confirmed for VS_2through structural *** VS_2electrode exhibits a maximum specific capacitance of 349 F g^(-1)with a super stable behavior in three-electrode liquid-state *** flexible symmetric solid-state supercapacitor(FSSC)device using gel electrolyte yields specific power of 1.5 k W kg^(-1)(specific energy of 25.9 Wh kg^(-1))with a widen voltage window of 1.6 V.A red LED has been glown for30 s using the system consisted of two devices in series ***,the system glows a combination of 21 red LEDs network with acronym‘VNIT’,demonstrating commercial *** attribution of device demonstration even under mechanical stress holds great promise towards advanced flexible electronics application.

关键词： Chemical method vs2 Supercapacitor Gel electrolyte Symmetric device

Anchoring polysulfide with artificial solid electrolyte interphase for dendrite-free and low N/P ratio Li-S batteries

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Journal of Energy Chemistry 2023年第5期80卷 32-39,I0002页

作者： Wei Lu Zhao Wang Guiru Sun Shumin Zhang Lina Cong Lin Lin Siru Chen Jia Liu Haiming Xie Yulong Liu Key Laboratory of Functional materials physics and Chemistry Ministry of Education Jilin Normal UniversityChangchun 130103jilinChina College of Information Technology Jilin Engineering Research Center of Optoelectronic Materials and DevicesJilin Normal UniversitySiping 136000JilinChina department of Mechanical and materials Engineering Western UniversityChangchun 130024JilinChina School of Chemistry Northeast Normal UniversityLondon N6A 3K7Canada

Lithium sulfur batteries are regarded as a promising candidate for high-energy-density energy storage ***,the lithium metal anode in lithium-sulfur batteries encounters the problem of lithium dendrites and lithium metal consumption caused by polysulfide *** we design a dualfunction PMMA/PPC/LiNO3composite as an artificial solid electrolyte interphase(PMCN-SEI)to protect Li metal *** SEI offers multiple sites of C=O for polysulfide anchoring to constrain corrosion of Li metal *** lithiated polymer group and Li3N in PMCN-SEI can homogenize lithium-ion deposition behavior to achieve a dendrite-free *** a result,the PMCN-SEI protected Li metal anode enables the Li||Li symmetric batteries to maintain over 300 cycles(1300 h)at a capacity of 5 m Ah cm^(-2),corresponding to a cumulative capacity of 3.25 Ah cm^(-2).Moreover,Li-S batteries assembled with 20μm of Li metal anode(N/P=1.67)still deliver an initial capacity of 1166 m A h g-1at ***,introducing polycarbonate polymer/inorganic composite SEI on Li provides a new solution for achieving the high energy density of Li-S batteries.

关键词： Thin Limetal anode Solid electrolyte interphase(SEI) Lithium-sulfur(Li-S)batteries Polymer/inorganic composite Polycarbonate

Influence of a centered dielectric tube on inductively coupled plasma source: Chamber structures and plasma characteristics

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Chinese physics B 2017年第7期26卷 250-255页

作者：毕振华洪义雷光玖王帅王友年刘东平 Liaoning Key Laboratory of Optoelectronic Films & materials School of Physics and Materials EngineeringDalian Nationalities University Southwestern Institute of physics physics department School of Science Northeastern University School of physics and Optoelectronic Technology Dalian University of Technology

A high-density RF ion source is an essential part of a neutral beam injector. In this study, the authors attempt to retrofit an original regular RF ion source reactor by inserting a thin dielectric tube through the symmetric axis of the discharge chamber. With the aid of this inner tube, the reactor is capable of generating a radial magnetic field instead of the original transverse magnetic field, which solves the E × B drift problem in the current RF ion source structure. To study the disturbance of the dielectric tube, a fluid model is introduced to study the plasma parameters with or without the internal dielectric tube, based on the inductively coupled plasma（ICP） reactor. The simulation results show that while introducing the internal dielectric tube into the ICP reactor, both the plasma density and plasma potential have minor influence during the discharge process, and there is good uniformity at the extraction region. The influence of the control parameters reveals that the plasma densities at the extraction region decrease first and subsequently slow down while enhancing the diffusion region.

关键词： neutral beam ion source inductively coupled plasma(ICP) fluid model

Reconfiguring perovskite interface via R4NBr addition reaction toward efficient and stable FAPbI3-based solar cells

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Science China Chemistry 2022年第6期65卷 1185-1195页

作者： Hongshi Li Zhenghao Liu Zijing Chen Shan Tan Wenyan Zhao Yiming Li Jiangjian Shi Huijue Wu Yanhong Luo Dongmei Li Qingbo Meng Laboratory for Renewable Energy(CAS) Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of Sciences(CAS)Beijing100190China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Institute of New Energy Material Chemistry School of Materials Science and EngineeringNankai UniversityTianjin300350China School of Physical Sciences University of Chinese Academy of SciencesBeijing100049China Songshan Lake materials Laboratory DongguanGuangdong523808China

Defect states in perovskite films restrict the interfacial stability and open-circuit voltage of perovskite solar ***,aiming at superior interfacial passivation,we investigate the reconfiguration of perovskite interface by the interaction between a series of quaternary ammonium bromides(QAB)and lead—halide(Pb—X)***—iodide substitution reaction or R4NBr addition reaction may occur on the perovskite surface,which is related to the steric hindrance of quaternary ammonium *** this basis,the perovskite surface morphology,band structure,growth orientation and defect states are reconstructed via the R4NBr addition *** ordered lead—halide adduct could effectively repair the imperfect perovskite/hole transportation layer interface to suppress non-radiative recombination and ion migration toward ultralong carrier lifetime surpassing 10µ*** resulting perovskite solar cells yield the efficiency of 23.89%with steady-state efficiency of 23.70%.The passivated cells can sustain 86%of initial efficiency after 200-h operation,which is attributed to the passivation effect and hydrophobic *** work provides an avenue for reconfiguring perovskite surface by QABs.

关键词： perovskite solar cells addition reaction substitution reaction lead–halide adduct quaternary ammonium bromide interface stability

Enhancing Hyper-Spectral Image Classification with Reinforcement Learning and Advanced Multi-Objective Binary Grey Wolf Optimization

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Computers, materials & Continua 2024年第6期79卷 3469-3493页

作者： Mehrdad Shoeibi Mohammad Mehdi Sharifi Nevisi Reza Salehi Diego Martín Zahra Halimi Sahba Baniasadi TheWPI Business School Worcester Polytechnic InstituteWorcesterMassachusetts01609-2280USA department of Industrial Engineering Iran University of Science and TechnologyNarmakTehran16846-13114Iran ETSI de Telecomunicación Universidad Politécnica de MadridAv.Complutense 30Madrid28040Spain department of Civil and Environmental Engineering University of MarylandCollege ParkMaryland20742USA department of Industrial Engineering College of EngineeringUniversity of HoustonHoustonTexas77204USA

Hyperspectral(HS)image classification plays a crucial role in numerous areas including remote sensing(RS),agriculture,and the monitoring of the *** band selection in HS images is crucial for improving the efficiency and accuracy of image *** process involves selecting the most informative spectral bands,which leads to a reduction in data *** on these key bands also enhances the accuracy of classification algorithms,as redundant or irrelevant bands,which can introduce noise and lower model performance,are *** this paper,we propose an approach for HS image classification using deep Q learning(DQL)and a novel multi-objective binary grey wolf optimizer(MOBGWO).We investigate the MOBGWO for optimal band selection to further enhance the accuracy of HS image *** the suggested MOBGWO,a new sigmoid function is introduced as a transfer function to modify the wolves’*** primary objective of this classification is to reduce the number of bands while maximizing classification *** evaluate the effectiveness of our approach,we conducted experiments on publicly available HS image datasets,including Pavia University,Washington Mall,and Indian Pines *** compared the performance of our proposed method with several state-of-the-art deep learning(DL)and machine learning(ML)algorithms,including long short-term memory(LSTM),deep neural network(DNN),recurrent neural network(RNN),support vector machine(SVM),and random forest(RF).Our experimental results demonstrate that the Hybrid MOBGWO-DQL significantly improves classification accuracy compared to traditional optimization and DL ***-DQL shows greater accuracy in classifying most categories in both datasets *** the Indian Pine dataset,the MOBGWO-DQL architecture achieved a kappa coefficient(KC)of 97.68%and an overall accuracy(OA)of 94.32%.This was accompanied by the lowest root mean square error(RMSE)of 0.94,indicating very precise

关键词： Hyperspectral image classification reinforcement learning multi-objective binary grey wolf optimizer band selection

Controllable vortex lasing arrays in a geometrically frustrated exciton-polariton lattice at room temperature

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National Science Review 2023年第1期10卷 196-204页

作者： Jun Wang Yutian Peng Huawen Xu Jiangang Feng Yuqing Huang Jinqi Wu Timothy C.H.Liew Qihua Xiong Division of physics and Applied physics School of Physical and Mathematical Sciences Nanyang Technological University department of Optical Science and Engineering and Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception Fudan University State Key Laboratory of Low-Dimensional Quantum physics and department of physics Tsinghua University Beijing Academy of Quantum Information Sciences

Quantized vortices appearing in topological excitations of quantum phase transition play a pivotal role in strongly correlated physics involving the underlying confluence of superfluids,Bose-Einstein condensates and *** polaritons as bosonic quasiparticles have enabled studies of non-e quilibrium quantum gases and ***-polariton condensates in artificial lattices intuitively emulate energy-band structures and quantum many-body effects of condensed matter,underpinning constructing vortex lattices and controlling quantum fluidic ***,we harness exciton-polariton quantum fluids of light in a frustrated kagome lattice based on robust metal-halide perovskite microcavities,to demonstrate vortex lasing arrays and modulate their configurations at room *** energy-momentum spectra unambiguously reveal massless Dirac bands and quenched kinetic-energy flat bands coexisting in kagome lattices,where polariton condensates exhibit prototypical honeycomb and kagome spatial *** coherence investigations illustrate two types of phase textures of polariton condensates carrying ordered quantized-vortex arrays and π-phase shifts,which could be selected when needed using lasing emission *** findings offer a promising platform on which it is possible to study quantum-fluid correlations in complex polaritonic lattices and highlight feasible applications of structured light.

关键词： vortex lasing exciton–polariton lattice Bose–Einstein condensation the orbital angular momentum of light geometric frustration perovskite semiconductor

Determination of Traps' Density of State in OLEDs from Current-Voltage Analysis

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Chinese physics Letters 2016年第1期33卷 127-131页

作者： M.S.Zaini M.A.Mohd Sarjidan W.H.Abd.Majid Low Dimensional materials Research Centre Physics DepartmentUniversity of Malaya

A simple method to determine the traps＇ density of state （DOS） in organic light-emitting diodes （OLEDs） by manipulating the current-voltage （I-V） characteristic of the devices at room temperature is introduced. In particular, the trap-dependent space-charge limited current formula is simplified to obtain effective density of traps. In this study, poly[（9,9-di-n-octylfluorenyl-2,7-diyl）-alt-（benzo[2,1,3]thiadiazol-4,8-diyl）] （F8BT） and 2- Methoxy-5-（3＇, 7＇-dimethyloctyloxy） benzene-l,4-diacetonitrile （0C1 Clo-PPV） are selected as the OLEDs emissive layer. The trap DOS of F8BT- and OC1Clo-PPV-based OLEDs are calculated in the magnitudes of 1024 m^-3 and 1023 m^-3, respectively. In addition, the results agree with the other conventional method which is used to determine the trap DOS in OLEDs. This calculation technique may serve as a robust and reliable approach to obtain the trap DOS in OLEDs at room temperature.

关键词： OLEDs Determination of Traps of in from

Antiresonance induced spin-polarized current generation

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Chinese physics B 2011年第12期20卷 346-349页

作者：尹笋闵文静高琨解士杰刘德胜 department of physics and State Key Laboratory of Crystal materials Shandong University

According to the one-dimensional antiresonance effect （Wang X R, Wang Y and Sun Z Z 2003 Phys. Rev. B 65 193402）, we propose a possible spin-polarized current generation device. Our proposed model consists of one chain and an impurity coupling to the chain. The energy level of the impurity can be occupied by an electron with a specific spin, and the electron with such a spin is blocked because of the antiresonance effect. Based on this phenomenon our model can generate the spin-polarized current flowing through the chain due to different polarization rates. On the other hand, the device can also be used to measure the generated spin accumulation. Our model is feasible with today＇s technology.

关键词： antiresonance spin-polarized current impurity

Hot-electron emission-driven energy recycling in transparent plasmonic electrode for organic solar cells

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InfoMat 2022年第3期4卷 121-130页

作者： Jing-De Chen Ling Li Chao-Chao Qin Hao Ren Yan-Qing Li Qing-Dong Ou Jia-Jia Guo Shi-Jie Zou Feng-Ming Xie Xianjie Liu Jian-Xin Tang Jiangsu Key Laboratory for Carbon-Based Functional materials&Devices Institute of Functional Nano&Soft Materials(FUNSOM)Soochow UniversitySuzhouJiangsuChina College of physics and materials Science Henan Normal UniversityXinxiangHenanChina School of physics and Electronic Science Ministry of Education Nanophotonics&Advanced Instrument Engineering Research CenterEast China Normal UniversityShanghaiChina department of materials Science and Engineering Monash UniversityClaytonVictoriaAustralia Laboratory of Organic Electronics Department of Science and Technology(ITN)Linköping UniversityNorrköpingSweden Macao Institute of materials Science and Engineering(MIMSE) Macao University of Science and TechnologyTaipaMacao SARChina

Plasmonic metal electrodes with subwavelength nanostructures are promising for enhancing light harvesting in ***,the nonradiative damping of surface plasmon polaritons(SPPs)during coupling with sunlight results in the conversion of the excited hot-electrons to heat,which limits the absorption of light and generation of ***,an energy recycling strategy driven by hotelectron emission for recycling the SPP energy trapped in the plasmonic electrodes is proposed.A transparent silver-based plasmonic metal electrode(A-PME)with a periodic hexagonal nanopore array is constructed,which is combined with a luminescent organic emitter for radiative recombination of the injected *** to the suppressed SPP energy loss via broadband hot-electron emission,the A-PME achieves an optimized optical transmission with an average transmittance of over 80%from 380 to 1200 ***,the indium-tin-oxide-free organic solar cells yield an enhanced light harvestingwith a power conversion efficiency of 16.1%.

关键词： energy recycling hot-electron emission organic solar cells plasmonic electrode surface plasmon polariton