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Electrochemical performance of La_(2)NiO_(4+δ)-Ce_(0.55)La_(0.45)O_(2−δ)as a promising bifunctional oxygen electrode for reversible solid oxide cells

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Journal of advanced Ceramics 2021年第2期10卷 328-337页

作者： Pengzhang Li Wei Yang Chuanjin Tian Wenyan Zhao Zhe Lü Zhipeng Xie Chang-An Wang School of Materials Science and Engineering Jingdezhen Ceramic InstituteJingdezhen333403China School of Physics Harbin Institute of TechnologyHarbin150001China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

In this work,La_(2)NiO_(4+δ)-Ce_(0.55)La_(0.45)O_(2−δ)(denoted as LNO-xLDC)with various LDC contents(x=0,10,20,30,and 40 wt%)were prepared and evaluated as bifunctional oxygen electrodes for reversible solid oxide cells(RSOCs).Compared with the pure LNO,the optimum composition of LNO-30LDC exhibited the lowest polarization resistance(Rp)of 0.53 and 0.12Ω·cm^(2)in air at 650 and 750℃,*** enhanced electrochemical performance of LNO-30LDC oxygen electrode was mainly attributed to the extended triple phase boundary and more oxygen ionic transfer *** hydrogen electrode supported single cell with LNO-30LDC oxygen electrode displayed peak power densities of 276,401,and 521 mW·cm^(−2)at 700,750,and 800℃,***,the electrolysis current density of the single cell demonstrated 526.39 mA·cm^(−2) under 1.5 V at 800℃,and the corresponding hydrogen production rate was 220.03 mL·cm^(−2)·h^(−1).The encouraging results indicated that LNO-30LDC was a promising bifunctional oxygen electrode material for RSOCs.

关键词： La_(2)NiO_(4+δ)(LNO) oxygen electrode electrochemical performance reversible solid oxide cells(RSOCs)

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富羟基PtNi纳米粒子作为海水中电化学析氢反应的高效催化剂（英文）

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Science China materials 2025年

作者：赵文英杨雄肖宇轩余菲田歌沈凌卢毅耿伟吴思明应杰 Ion Tiginyanu Kenneth I. Ozoemena 阳晓宇 State Key Laboratory of Silicate Materials for Architectures & State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Chemistry Chemical Engineering and Life Sciences & Laoshan Laboratory & School of Materials Science and Engineering & International School of Materials Science and Engineering Wuhan University of Technology School of Chemical Engineering and Technology Sun Yat-sen University National Center for Materials Study and Testing Technical University of Moldova Molecular Sciences Institute School of Chemistry University of the Witwatersrand National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu Laboratory

Cl-吸附及腐蚀效应是Pt基催化剂在海水析氢反应（HER）中性能的主要障碍.虽然引入羟基是提升HER动力学和缓解氯毒化的有效策略,但在Pt基催化剂体系中实现这一策略仍具挑战性.本研究通过高温还原法制备了具有Ni空位（路易斯酸位点）的PtN...

Cl-吸附及腐蚀效应是Pt基催化剂在海水析氢反应（HER）中性能的主要障碍.虽然引入羟基是提升HER动力学和缓解氯毒化的有效策略,但在Pt基催化剂体系中实现这一策略仍具挑战性.本研究通过高温还原法制备了具有Ni空位（路易斯酸位点）的PtNi合金纳米颗粒.路易斯酸位点促进Ni-LDH载体上晶格羟基向表面羟基的转化.Ni-LDH的晶格羟基通过与路易斯酸位点相互作用,产生表面羟基并协同提升其表面亲水性.这种双功能特性既能促进水分子吸附,又可抑制Cl-吸附.优化后的PtNi/Ni-LDH在碱性真实海水中展现出优异的HER性能,仅需1 9 mV过电位即可达到1 0 mA cm-2电流密度,塔菲尔斜率为31 mV dec-1,并在100小时耐久性测试中具有优异的稳定性.该研究为通过定向羟基工程设计高效海水裂解催化剂提供了理论基础.

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Prediction of mechanical properties of hot-rolled steel based on multi-channel convolutional neural network 5

Prediction of mechanical properties of hot-rolled steel base...

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5th International Conference on Internet of Things, Automation and Artificial Intelligence, IoTAAI 2023

作者： Wang, Zhengzhong Wang, Shengdong Zhang, Kai Tang, Xingchang Wang, Yichao Jiugang Group Carbon Steel Sheet Factory Jiayuguan735100 China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China College of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China College of Computer and Communication Lanzhou University of Technology Lanzhou730050 China

ISBN: (纸本)9798400716485

A multi-channel parallel convolutional neural network model is proposed to predict the mechanical properties of hot-rolled steel by chemical content and process parameters. The innovative contribution of this paper is to propose an improved Gramian Angular field method in the field of steel performance prediction, which converts the original data into a two-dimensional image matrix and introduces new features. Compared with the traditional convolutional neural network model, the multi-channel parallel convolutional neural network uses private blocks to decouple data and public blocks to integrate key data, which effectively improves the prediction accuracy of the model. Experiments in this paper show that the optimal hyperparameter structure model proposed in this paper has higher prediction accuracy than similar models proposed in other literatures. © 2023 ACM.

关键词： Convolutional neural networks

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Compact ultrabroadband light-emitting diodes based on lanthanide-doped lead-free double perovskites

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Light(Science & Applications) 2022年第3期11卷 94-106页

作者： Shilin Jin Renfu Li Hai Huang Naizhong Jiang Jidong Lin Shaoxiong Wang Yuanhui Zheng Xueyuan Chen Daqin Chen College of Physics and Energy Fujian Normal UniversityFujian Provincial Key Laboratory of Quantum Manipulation and New Energy MaterialsFuzhou 350117China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information Fuzhou 350116China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials and State Key Laboratory of Structural ChemistryFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujian 350002China Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering Fuzhou 350117China Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage Fuzhou 350117China College of Chemistry Fuzhou UniversityFuzhou 350116China

Impurity doping is an effective approach to tuning the optoelectronic performance of host materials by imparting extrinsic electronic ***,a family of lanthanide(Ln^(3+))ions was successfully incorporated into a Bi:Cs_(2)AgInCl_(6) lead-free double-perovskite(DP)semiconductor,expanding the spectral range from visible(Vis)to near-infrared(NIR)and improving the photoluminescence quantum yield(PLQY).After multidoping with Nd,Yb,Er and Tm,Bi/Ln:Cs_(2)AgInCl_(6) yielded an ultrabroadband continuous emission spectrum with a full width at half-maximum of~365 nm originating from intrinsic self-trapped exciton recombination and abundant 4f-4f transitions of the Ln^(3+)***-state and transient-state spectra were used to ascertain the energy transfer and emissive *** avoid adverse energy interactions between the various Ln^(3+)ions in a single DP host,a heterogeneous architecture was designed to spatially confine different Ln^(3+)dopants via a“DP-in-glass composite”(DiG)*** bottom-up strategy endowed the prepared Ln^(3+)-doped DIG with a high PLQY of 40%(nearly three times as high as that of the multidoped DP)and superior long-term ***,a compact Vis-NIR ultrabroadband(400~2000 nm)light source was easily fabricated by coupling the DiG with a commercial UV LED chip,and this light source has promising applications in nondestructive spectroscopic analyses and multifunctional lighting.

关键词： dopant tuning double

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Surface-assembled highly flexible Na_(3)(VOPO_(4))_(2)F nanocube cathode for high-rate binder-free Na-ion batteries

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Chinese Chemical Letters 2021年第2期32卷 826-829页

作者： Bohua Deng Ning Yue Haoyang Dong Qiuyue Gui Liang Xiao Jinping Liu School of Chemistry Chemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology.Wuhan 430070China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025China

Flexible Na-ion storage cathodes are still very few due to the challenge in achieving both reliable mechanical flexibility and excellent electrochemical ***,a new type of flexible Na_(3)(VOPO_(4))_(2)F cathode with nanocubes tightly assembled on carbon cloth is fabricated by a facile solvothe rmal method for the first *** cathode is able to exhibit superior rate capability and stable cycling performa nce up to 1000 cycles,due to the surface-assembling of crystalline nanocubes on carbon *** addition,it shows good mechanical flexibility,nearly no capacity decay is observed after continuous bending of 500 *** this novel cathode and a directly-grown Na_(2)Ti_(2)O_(5) anode,a fully binde r-free Na-ion battery is *** can deliver a high wo rking voltage and increased gravimetric energy/power densities(maximum values:220.2 Wh/kg;5674,7 W/kg),and can power a LED indicator at bending angles fro m 0° to 180°.

关键词： Flexible cathode Na_(3)(VOPO_(4))_(2)F Nanocube Surface-assembling Sodium-ion battery

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氮掺杂Ti_(3)C_(2)T_(x)MXene纳米片包覆的SiO_(x)实现储锂性能提升

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Science China materials 2023年第1期66卷 51-60页

作者：张开元赵丹钱钊顾鑫杨剑钱逸泰 Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationSchool of Materials Science and EngineeringShandong UniversityJinan 250061China College of New Energy State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580China Hefei National Laboratory for Physical Science at Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026China

构建具有快速反应动力学和优异循环稳定性的SiO_(x)基负极材料是获取高性能锂离子电池的关键和挑战.本文中,我们利用三聚氰胺辅助的球磨和退火方法,合成了氮掺杂的Ti_(3)C_(2)T_(x)MXene超薄片层(NTS)包覆的SiO_(x)复合材料.通过对比实... 详细信息

构建具有快速反应动力学和优异循环稳定性的SiO_(x)基负极材料是获取高性能锂离子电池的关键和挑战.本文中,我们利用三聚氰胺辅助的球磨和退火方法,合成了氮掺杂的Ti_(3)C_(2)T_(x)MXene超薄片层(NTS)包覆的SiO_(x)复合材料.通过对比实验和理论计算,我们论证了三聚氰胺剥离MXene的作用机理.SiO_(x)与NTS之间强烈的界面相互作用(Si-O-Ti键)可以有效地增强电子转移,确保电极的稳定性.此外,具有丰富表面基团的NTS使复合材料具有赝电容性能,有利于快速储锂.因此,该复合材料展现出了长循环寿命(在1.0 A g^(-1)的电流密度下,循环800次后比容量保持为~700 mA h g^(-1))和优越的倍率性能(在5 A g^(-1)的电流密度下,比容量为596.4 mA h g^(-1)).更重要的是,在高负载量下,该复合材料在半电池和全电池中均表现出较高的面积比容量和良好的循环稳定性,展现出了良好的应用潜力.

关键词：锂离子电池长循环寿命负极材料储锂性能半电池循环稳定性界面相互作用表面基团

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Anisotropic electrical properties of aligned PtSe_(2) nanoribbon arrays grown by a pre-patterned selective selenization process

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Nano Research 2022年第5期15卷 4668-4676页

作者： Huaipeng Wang Zhifang Liu Yilin Sun Xiaofan Ping Jianlong Xu Yingtao Ding Haowen Hu Dan Xie Tianling Ren School of Integrated Circuits Beijing National Research Center for Information Science and Technology(BNRist)Tsinghua UniversityBeijing 100084China Department of Chemistry Tsinghua UniversityBeijing 100084China School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijing 100081China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

This study proposes a feasible and scalable production strategy to naturally obtain aligned platinum diselenide(PtSe_(2))nanoribbon arrays with anisotropic *** anisotropic properties of two-dimensional(2D)materials,especially transition-metal dichalcogenides(TMDs),have attracted great interest in *** dependence of physical properties on their lattice orientations is of particular interest because of its potential in diverse applications,such as nanoelectronics and ***-dimensional(1D)nanostructures facilitate many feasible production strategies for shaping 2D materials into unidirectional 1D nanostructures,providing methods to investigate the anisotropic properties of 2D materials based on their lattice orientations and *** natural alignment of zigzag(ZZ)PtSe_(2) nanoribbons is experimentally demonstrated using angle-resolved polarized Raman spectroscopy(ARPRS),and the selective growth mechanism is further theoretically revealed by comparing edges and edge energies of different orientations using the density functional theory(DFT).Back-gate field-effect transistors(FETs)are also constructed of unidirectional PtSe_(2) nanoribbons to investigate their anisotropic electrical properties,which align with the results of the projected density of states(DOS)*** work provides new insight into the anisotropic properties of 2D materials and a feasible investigation strategy from experimental and theoretical perspectives.

关键词： PtSe_(2) scalable production anisotropic properties nanoribbons density functional theory

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In situ growth of NiSe@Co_(0.85)Se heterointerface structure with electronic modulation on nickel foam for overall water splitting

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Rare Metals 2021年第6期40卷 1373-1382页

作者： Wen-Long Ding Yan-Hui Cao Hui Liu Ao-Xuan Wang Cui-Juan Zhang Xue-Rong Zheng Key Laboratory for Green Chemical Technology of Ministry of Education State Key Laboratory of Chemical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China Department of Physics and Astronomy University of CaliforniaIrvineCA 92697USA Tianjin Kaben New Materials Technology Co. Ltd.Tianjin 300350China

Constructing heterointerface engineering has becoming an effective and general strategy for developing highly efficient and durable nonnoble electrocatalysts for catalyzing both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).In this work,we synthesized a self-supporting heterogeneous NiSe@Co_(0.85)Se/NF electrocatalyst using a facile in situ selenization of transition metal precursors that coated on the nickel foam(NF)in polyol *** NF was used as both conductive substrate and nickel source,ensuring superior electronic conductivity for *** NiSe@-Co_(0.85)Se/NF exhibited remarkable bifunctional electrocatalytic activities with HER overpotential of 168 mV and OER overpotential of 258 mV to achieve 10 mA·*** water splitting system using NiSe@Co_(0.85)Se/NF as both anode and cathode electrodes achieved a current density of 10 mA·cm^(-2) at 1.61 V with nearly 100% faradaic efficiency and impressively long-term *** efficient bifunctional catalytic performance of NiSe@-Co_(0.85)Se/NF should be attributed to the electronic modulation and synergistic effect between NiSe and Co_(0.85)Se,the intrinsic metallic conductivity and the enlarged active sites *** work provides a facile method for developing heterogeneous bifunctional catalysts for advanced electrochemical energy conversion technologies.

关键词： NiSe@Co_(0.85)Se/NF Heterointerface structure Electronic modulation Bifunctional electrocatalyst Overall water splitting

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Bifunctional Activated Carbon Ultrathin Fibers:Combining the Removal of VOCs and PM in One Material

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advanced Fiber materials 2023年第6期5卷 1934-1948页

作者： Haiyang Wang Di Zu Xinyu Jiang Yong Xu Zhiwen Cui Peng Du Zekun Cheng Ziwei Li Lei Li Chong Yang Xiaopeng Bai Baopu Zhang Yiqian Zhou Kuangyu Wang Bohan Li Zhenghong Huang Lihao Zhao Bo Li Hui Wu State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084People’s Republic of China Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolShenzhen 518055People’s Republic of China Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua UniversityBeijing 100084People’s Republic of China Beijing Tongfang Envir-Clean Technology Co. LTDBeijing 100083People’s Republic of China

Volatile organic compounds(VOCs)and particulate matter(PM)are both frequently present in air as contaminants,posing serious health and environmental *** current filtration of VOCs utilizes entirely different materials compared with PM filtration,adding complexity to air cleaning ***,we design a pitch-based activated carbon ultrathin fibers(PACUFs)for bifunctional air *** PACUFs,with fiber diameter of∼1.2μm and specific surface area of 2341 m^(2) g^(−1),provide both high VOCs adsorption capacity(∼706 mg g^(−1))and excellent efficiency of∼97% PM_(0.3) filtration with low pressure *** contrast,traditional activated carbon fibers exhibit VOCs adsorption capacity of∼448 mg g^(−1) and PM_(0.3) removal efficiency of only∼36%at an equal area density of∼190 g m^(−2).Theoretical investigations reveal the filtration mechanism of the high-performance bifunctional fibrous PACUFs,considering full advantages of the high surface area,small pore size,and significant micropore volume.

关键词： Air pollutants Activated carbon fiber Melt-blown spinning Bifunctional purification

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Recent Researches of Graphene in Magnesium Alloy Protective Coatings 17th

Recent Researches of Graphene in Magnesium Alloy Protective ...

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17th Annual Conference of China Electrotechnical Society, CES 2022

作者： Hou, Lei Pang, Zhen Chi, Cheng Wang, Shukun Ding, Yi Ding, Xue Shandong Taikai High Volatge Switchgear Co. Ltd. Shandong Taian271000 China State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co. Ltd. Beijing102209 China Beijing Advanced Materials and New Energy Technology Development Center Beijing100080 China

ISBN: (纸本)9789819904075

With the development of global economy and increasing energy consumption, a clean, eco-friendly, sustainable and eco-friendly global society is required by the incoming post-fossil-fuel era. Owing to valuable physical properties such as light-weight, easy-process, considerable mechanical strength, etc., magnesium alloys have been broadly applied in various fields of industries like electronics, automobile, and aerospace, making them popular and promising candidates for the clean-energy researches. Due to its valuable intrinsic properties, sheet structure and ductility, graphene can be effectively doped into the protective coatings of Mg alloys, and consequently enhance the corrosion resistance of such alloys. In this review, the research and application status, disadvantages and outlook of graphene in Mg alloy coatings are briefly introduced. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： Magnesium alloys

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