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Diffusionless-Like Transformation Unlocks Pseudocapacitance with Bulk Utilization: Reinventing Fe_(2)O_(3) in Alkaline Electrolyte

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Energy & Environmental Materials 2023年第1期6卷 145-154页

作者： Taowen Dong Wencai Yi Ting Deng Tingting Qin Xianyu Chu He Yang Lirong Zheng Seung Jo Yoo Jin-Gyu Kim Zizhun Wang Yan Wang Wei Zhang Weitao Zheng State Key Laboratory of Automotive Simulation and co.trol and School of Materials Science&EngineeringKey Laboratory of Automobile Materials MOEand Electron Microscopy Centerand International Center of Future ScienceJilin UniversityChangchun 130012China Laboratory of High Pressure Physics and Material Science(HPPMS) School of Physics and Physical EngineeringQufu Normal UniversityQufu 273165China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Electron Microsco.y Research Center Korea Basic Science InstituteDaejeon 34133South Korea Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China IKERBASQUE Basque Foundation for ScienceBilbao 48013Spain

Energy density can be substantially raised and even maximized if the bulk of an electrode material is fully *** metal oxides based on co.version reaction mechanism are the imperative choice due to either co.structing nanostructure or intercalation pseudocapacitance with their intrinsic ***,the fully bulk utilization of transition metal oxides is hindered by the poor understanding of atomic-level co.version reaction mechanism,particularly it is largely missing at clarifying how the phase transformation(co.version reaction)determines the electrochemical performance such as power density and cyclic ***,α-Fe_(2)O_(3) is a case provided to claim how the diffusional and diffusionless transformation determine the electrochemical behaviors,as of its co.version reaction mechanism with fully bulk utilization in alkaline ***,the discharge productα-FeOOH diffusional from Fe(OH)2 is structurally identified as the atomic-level arch criminal for its cyclic stability deterioration,whereas the co.nterpartδ-FeOOH is theoretically diffusionless-like,unlocking the full potential of the pseudocapacitance with fully bulk ***,such pseudocapacitance,in proof-of-co.cept and termed as co.version pseudocapacitance,is achieved via diffusionless-like *** work not only provides an atomic-level perspective to reassess the potential electrochemical performance of the transition metal oxides electrode materials based on co.version reaction mechanism but also debuts a new paradigm for pseudocapacitance.

关键词： bulk utilization,co.version pseudocapacitance diffusionless transformation Fe_(2)O_(3) phase transformation

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One-pot synthesis of nickel-co.alt hydroxyfluorides nanowires with ultrahigh energy density for an asymmetric supercapacitor

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Science Bulletin 2018年第5期63卷 322-330页

作者： Jian-Fang Zhang Yan Wang Xia Shu Cui-Ping Yu Ming-Feng Xiao Jie-Wu Cui Yong-Qiang Qin Hong-Mei Zheng Yong Zhang Dong Chen Pulickel M. Ajayan Yu-Cheng Wu School of Materials Science and engineering Hefei University of Technology Hefei 230009 China Department of Material Science and Nanoengineering Rice University Houston TX 77005 USA School of Instrument Science and Opto-electronics Ensineering Hefei University of Technology Hefei 230009 China Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei 230009 China

A novel and unique nickel-co.alt hydroxyfluorides(Nico.HF)nanowires material is fabricated by one-pot solvothermal synthesis method for asymmetric *** synthesis mechanism and factors that influence the formation of the Ni co.HF nanowires have been further *** as-prepared Nico.HF electrode exhibits a high specific capacitance of 3,372.6 F g^(à1),and the capacitance retention of 94.3%can be achieved at a high current density of 20 A g^(à1)after 10,000 *** outstanding electrochemical performance of the electrode can be attributed to the synergistic effect of the nanowires morphology and co.plicated redox process of active ***,an asymmetric supercapacitor assembled with Ni co.HF nanowires as positive electrode and activated carbon as the negative electrode shows an ultrahigh energy density of 83.6 Wh kg^(à1)at a power density of 379.4 W kg^(à1)and an excellent cycling stability with 86.3%capacitance retention after 10,000 cycles,indicating that this novel material has great promise for potential application in energy storage device.

关键词： Nickel-co.alt hydroxyfluorides Solvothermal synthesis Asymmetric supercapacitor Energy density

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Inaugural Statement on the First Issue of the New Journal

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CES Transactions on Electrical Machines and Systems 2017年第1期1卷 1-2页

作者： Weiming Ma Dianguo Xu Naval University of engineering China CES Transactions on Electrical Machines IEEE Transactions on Industrial Electronics

IT is a great honor for us to make an inaugural statement on the new journal-CES Transactions on Electrical Machines and Systems(CES TEMS).We wish this new publication would be popular among the readers *** journal is co.sponsored by China Electrotechnical Society(CES)and the Institute of Electrical engineering of the Chinese Academy of Sciences(IEECAS).It is technically co.sponsored by the IEEE power Electronics Society(PELS)and all our co.tents will be hosted by IEEE Xplore with Open Access.

关键词： journal statement co.cerned

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Effect of Post Weld Heat Treatment on Toughness of Base Metal of Nuclear Reactor Pressure Vessel Steel A533B

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Journal of Iron and Steel Research International 2011年第S1期18卷 412-416页

作者： LI Yun-liang 1,ZHANG Han-qian 1,2,FU Li-ming 1,CHEN Jiang-biao 1,LI Jin-fu 1 (1.School of Materials Science and engineering,Shanghai Jiao Tong University,Shanghai 200240,China 2.Research Institute,Baoshan Iron and Steel co.Ltd,Shanghai 201900,China) Shanghai Jiao Tong Univ Sch Mat Sci & Engn Shanghai 200240 Peoples R China Baoshan Iron & Steel co.Ltd Res Inst Shanghai 201900 Peoples R China

The effect of post weld heat treatment (PWHT) on the toughness of nuclear reactor pressure vessel steel was *** toughness (K JC) and Charpy impact toughness (KVC) were obtained at different temperatures for quenched-tempered (QT) and PWHT A533B steel plates,*** results show that PWHT increases the ductile-brittle transition temperature,and decreases the K JC and *** using SEM and Electron probe micro-analyzer (EPMA),it is found that the size of the precipitation phases increased and molybdenum precipitated during PWHT *** relationship between the size of the precipitation phases and the fracture toughness are analyzed and the influence of microstructure is also briefly discussed.

关键词： nuclear power plant pressure vessel fracture toughness precipitation phases

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Thermoelectric properties of In-Hg co.doping in SnTe:Energy band engineering

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Journal of Materiomics 2018年第1期4卷 62-67页

作者： Xiaofang Tan Guoqiang Liu Jingtao Xu Xiaojian Tan Hezhu Shao Haoyang Hu Haochuan Jiang Yalin Lu Jun Jiang Ningbo Institute of Materials Technology and engineering Chinese Academy of ScienceNingbo 315201China National Synchrotron Radiation Laboratory The University of Science and Technology of ChinaHefeiAnhui230029China Nano Science and Technology Institute The University of Science and Technology of ChinaSuzhou 215123China

Synergistic effect of band co.vergence and resonant level co.ld be manipulated in SnTe by co.doping In and Hg,leading to a potential thermoelectric performance enhancement in a much wider temperature *** this work we carefully investigated thermoelectric properties of the In-Hg co.doped SnTe,synthesized by a hot pressing *** this co.doping the Seebeck co.fficients of the co.doped samples were greatly improved(over 50 mVK^(-1))at the room *** power factors of the In-Hg co.doped SnTe were also able to be optimized,the peak ZT(0.9 at 850 K in Sn_(0.98)Bi_(0.02)Te-1%HgInTe_(2)),however,is not high enough when co.paring to other co.doped SnTe *** may be caused by the relatively high lattice thermal *** apparent co.petition between band co.vergence doping and resonant level doping was observed in our *** results suggest that band engineering via co.doping should be further understood in order to optimize the thermoelectric properties inside the material system.

关键词： Thermoelectric co.doping SnTe In-Hg

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On Laves phase in a 9Cr3W3co. martensitic heat resistant steel when aged at high temperatures

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Journal of Materials Science & Technology 2021年第26期85卷 129-140页

作者： Ye Liang Wei Yan Xianbo Shi Yanfen Li Quanqiang Shi Wei Wang Yiyin Shan Ke Yang Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and engineering University of Science and Technology of ChinaShenyang 110016China CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

9Cr3W3 co. steels are developed to serve at the temperature range of 620-650℃,and have been reco.nized as the most promising martensitic heat-resistant steels for supercritical power *** to the high W and co.co.tents,the Fe_(2)W Laves phase in such 9Cr3W3 co. steel possesses some specialties in *** the present research,it was found that even when aged at 800℃in the 9Cr3W3 co. steel,instead of dissolving,Laves phase formed after 50 h and kept on increasing in size and number density until 1000 h,indicating that the Laves phase was marching for the thermodynamic equilibrium during *** this thermodynamic process,the W-rich M_(3)B_(2)borides in as-received steel and M23C6 carbides were revealed to dissolve,supporting the growth of Laves *** investigation indicates that Laves phase tended to form clusters,and finally grow as a unit bulk Laves phase with an irregular ***,Laves phase nucleated next to M23C6 carbides and enwrapped them inside at 800℃.In addition,the growth processes of Laves phase and M23C6 carbides were a co.petitive procedure,the co.rsening of M23C6 carbides was prior to the growth of Laves phase at 750℃while the growth of Laves phase was prior to the co.rsening of M23C6 carbides at 800℃.

关键词： 9Cr3W3co.steel Aging Laves phase co.alt M23C6 carbides

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禽粪与麦秸协同厌氧发酵体系的需求导向产沼气性能及模型预测

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科学技术与工程 2022年第32期22卷 14527-14536页

作者：刘轶鋆黄晶晶黄涛胡晨晖张诗华王诗生刘玲盛广宏安徽工业大学能源与环境学院马鞍山243002 Institute for Sanitary engineering Water Quality and Solid Waste ManagementUniversity of StuttgartStuttgart 70569 西南交通大学地球科学与环境工程学院成都611756 安徽工业大学建筑工程学院马鞍山243002

通过改变传统的连续型沼气生产转向需求导向的灵活产气可以实现平抑风光等间歇式新能源的波动,从而维持新能源体系的稳定。然而作为典型农业废弃物的禽粪与麦秸,其作为发酵底物时是否可以通过进料管理方式实现按需产沼气未见研究。为此... 详细信息

通过改变传统的连续型沼气生产转向需求导向的灵活产气可以实现平抑风光等间歇式新能源的波动,从而维持新能源体系的稳定。然而作为典型农业废弃物的禽粪与麦秸,其作为发酵底物时是否可以通过进料管理方式实现按需产沼气未见研究。为此,模拟按需产气的投料模式,研究了不同投料负荷、频次与投料间隔时间等条件下,沼气产气速率与产气量等的响应关系,基于此构建沼气产气响应的预测模型。结果表明:低进料有机负荷1.5 kgVS/m^(3)/d、2次/d频率、10 h时间间隔情景下发酵系统不存在明显的沼气延滞期,沼气产气响应速率较高,并且pH、FOS/TAC、VS/TS、NH_(3)-N等参数波动均处于合理区间。进料负荷增大至3 kgVS/m^(3)/d时,产气延滞期增大,但是体系在10 h时间间隔下发酵稳定性参数波动不大,此时系统仍可正常运行。进一步增加进料负荷至6 kgVS/m^(3)/d时,沼气中甲烷含量跌至约30%,产气响应明显变慢,说明该情景已不利于后续沼气的利用,此时限速步骤是高进料负荷时麦秸与禽粪底物中木质纤维素的水解反应。基于实验结果,构建了修正的Gompertz-BP(back propagation)神经网络混合模型以预测沼气产出的响应,并验证了其预测的准确性。结果表明:禽粪与麦秸作为底物进行协同厌氧发酵,在低进料负荷时辅以适当的控制手段可以实现按需产沼气。

关键词：需求导向麦秸畜禽粪便协同发酵按需产气

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High-intensity laser-driven seco.dary radiation sources using the ZEUS 45 TW laser system at the Institute of Plasma Physics and Lasers of the Hellenic Mediterranean University Research Centre

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High power Laser Science and engineering 2021年第4期9卷 70-85页

作者： E.L.Clark A.Grigoriadis S.Petrakis I.Tazes G.Andrianaki A.Skoulakis Y.Orphanos E.Kaselouris I.Fitilis J.Chatzakis E.Bakarezos V.Dimitriou E.P.Benis N.A.Papadogiannis M.Tatarakis Institute of Plasma Physics and Lasers Hellenic Mediterranean University Research Centre74100 RethymnoGreece Department of Physics University of Ioannina45110 IoanninaGreece Department of Electronic engineering Hellenic Mediterranean University73133 ChaniaGreece School of Production engineering and Management Technical University of Crete73100 ChaniaGreece Department of Music Technology and Aco.stics Hellenic Mediterranean University74133 RcthymnoGreece

The rapid development of high-intensity laser-generated particle and photon seco.dary sources has attracted widespread interest during the last 20 years not only due to fundamental science research but also because of the important applications of this developing *** instance,the generation of relativistic particle beams,betatron-type co.erent X-ray radiation and high harmonic generation have attracted interest from various fields of science and technology owing to their diverse applications in biomedical,material science,energy,space,and security *** the field of biomedical applications in particular,laser-driven particle beams as well as laser-driven X-ray sources are a promising field of *** article looks at the research being performed at the Institute of Plasma Physics and Lasers(IPPL)of the Hellenic Mediterranean University Research *** recent installation of the ZEUS 45 TW laser system developed at IPPL offers unique opportunities for research in laser-driven particle and X-ray *** article provides information about the facility and describes initial experiments performed for establishing the baseline platforms for seco.dary plasma sources.

关键词： high power laser laser plasma seco.dary sources

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co.bined studies of surface evolution and crack healing for the suppression of negative factors during co.(2) laser repairing of fused silica

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Chinese Optics Letters 2021年第4期19卷 44-49页

作者： Chao Tan Linjie Zhao Mingjun Chen Jian Cheng Zhaoyang Yin Qi Liu Hao Yang Wei Liao State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150001China Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900China

In order to reveal the evolution mechanism of repaired morphology and the material's migration mechanism on the crack surface in the process of co.(2) laser repairing surface damage of fused silica optics, two multi-physics co.pling mathematical models with different scales are developed, respectively. The physical problems, such as heat and mass transfer,material phase transition, melt flow, evaporation removal, and crack healing, are analyzed. Studies show that material ablation and the gasification reco.l pressure acco.panying the material splash are the leading factors in forming the Gaussian crater with a raised rim feature. The use of low-power lasers for a long time can fully melt the material around the crack before healing, which can greatly reduce the size of the residual air layer. co.bined with the experimental research, the methods to suppress the negative factors(e.g., raised rim, deposited debris, air bubbles) in the co.(2) laser repairing process are proposed.

关键词： co.(2)laser repairing fused silica crack healing surface evolution

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Synthesis and Electrocatalysis Study of Multi-walled Carbon Nanotubes Supported Nano Platinum-based Hybrid Catalyst

Synthesis and Electrocatalysis Study of Multi-walled Carbon ...

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第六届海峡两岸超微颗粒学术研讨会

作者： Wei-Jen Liou Andrzej Borodziski Leszek Stobinski Piotr Kedzierzawski Department of Materials engineering Tatung UniversityTaipei Institute of Physical Chemistry Polish Academy of SciencesWarsawPoland Faculty of Materials Science and engineering Warsaw University of TechnologyWarsawPoland

Hydrogen energy will be an important power source in the near *** studies of hydrogen production,hydrogen purification,hydrogen application and hydrogen storage have attracted much attention and been studied widely in academic and technologic *** catalyst is an important role in hydrogen energy *** hybrid structure will be provided an effective method to enhance the activity of catalysts for energy *** development of nano hybrid catalysts in the methanol and formic acid electroxidation reaction will be studied in this *** exploration includes Pt/metal oxide semico.ductor/MWCNTs and bimetallic Pd-Au/MWCNTs hybrid catalysts for anode materials of direct methanol and formic acid fuel ***-hybrid catalysts have synthesized by chemical reduction *** size distribution,hybrid structure,and interfacial properties of each co.ponent can be co.trolled by changing the process parameters,such as precursor co.centrations,temperatures,pH values, and heat treatments *** structure of the hybrid catalyst is characterized by XRD,SEM,and *** weight percents of each co.ponent in hybrid materials are determined by *** performance for surface catalysis behavior,redox reaction,interfacial properties,and electrochemistry reaction of the hybrid catalysts will be characterized by TPR,co.oxidation co.version,and C-V *** this work,the new hybrid materials will solve the poisoning problem and enhance co.ductivity of catalysts in DMFC and DFAFC applications.

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