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Novel dye-sensitized solar cell architecture using TiO2-coated Ag nanowires array as photoanode

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Rare Metals 2019年第4期38卷 316-320页

作者： Ming Wang Sam Zhang zhao-Fu Du Li-dong Sun dong-liang zhao Department of Functional Material Research Central Iron and Steel Research Institute Beijing 100081 China School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639789 Singapore

With the aim of reducing series resistance and increasing dye loading,novel dye-sensitized solar cell architecture was designed with TiO2 nanoparticle-coated Ag nanowires array as the *** nanowire array was prepared by anodic aluminum oxide (AAO) templateassisted electrochemical deposition ***,Ag nanowires were coated by TiO2 nanoparticles in hydrothermal *** structures of the photoanode were characterized by field emission scanning electron microscopy (FESEM).Ag nanowires are covered by a layer of very fine nanoparticles with a diameter of less than 5 nm.X-ray diffraction (XRD) and selected-area electron diffraction (SAED) show that Ag nanowires have a strong preferred orientation in (220) direction and the TiO2 coating layer is a polycrystalline *** this photoanode,3.2 % conversion efficiency is achieved for the cell sensitized with N3 dye.

关键词： Dye-sensitized solar cell Nano wires array Photoanode Anodic aluminum oxide

Structure and electrochemical performances of as-milled LaMg12-type alloy-Ni composites

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Journal of Iron and Steel Research International 2019年第1期26卷 59-68页

作者： Wen-gang Bi Wei Zhang Jin-liang Gao Yan Qi dong-liang zhao Xiao-ping dong Yang-huan Zhang Department of Functional Material Research Central Iron and Steel Research InstituteBeijing 100081China Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010Inner MongoliaChina Weishan Cisri-Eare Earth Materials Co. LtdJining 277600ShandongChina Department of Mechanical Engineering Hebei UniversityBaoding 071002HebeiChina

LaMg11Ni+x wt.%Ni(x=100,200)alloys were prepared by ball milling and researched by various methods to study their structure and electrochemical hydrogen storage *** outcomes reveal that increasing Ni content contributes to improving its electrochemical ***,the discharge capacity of as-milled(40 h)alloy will be increased from 157.3 to 1053.5 mAh/g through enhancing Ni percentage from 100 to 200 wt.%when discharging at 60 mAh/*** milling obviously affects the electrochemical performanee of *** milling duration prolonging,the discharge capacity of x=100 alloy keeps increasing,while that of the x=200 alloy has a maximum *** time also affects the cycle stability of experimental *** ng milli ng duration clearly decreases the cycle stability of x=100 alloy but weakens that of the x=200 alloy at first and strengthens it *** addition,prolonging milling time makes the milling prepared x=100 and 200 alloys get the maximal values of high rate discharge ability of 81.60%and 84.52%,respectively.

关键词： LaMg12 alloy Mechanical milling Ni content Microstructure Hydrogen storage performance

The electrochemical hydrogen storage characteristics of as-spun nanocrystalline and amorphous Mg_(20)Ni_(10-x)M_x(M=Cu, Co, Mn;x=0–4) alloys

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Rare Metals 2014年第6期33卷 663-673页

作者： Yang-Huan Zhang Tai Yang Hong-Wei Shang Chen zhao Chao Xu dong-liang zhao Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and Technology Department of Functional Material Research Central Iron and Steel Research Institute

In this paper, we comprehensively investigate the influences of M（M=Cu, Co, Mn） substitution for Ni on the structures and electrochemical hydrogen storage characteristics of the nanocrystalline and amorphous Mg20Ni10-xMx（M=Cu, Co, Mn; x = 0–4） alloys prepared by melt spinning. The as-spun（M=None, Cu） alloys display an entire nanocrystalline structure, whereas the as-spun（M=Co, Mn） alloys hold a mixed structure of both nanocrystalline and amorphous when x = 4（M content）. These results indicate that the substitution of M（M=Co, Mn） for Ni facilitates the glass formation in Mg2Ni-type alloy. All the as-spun alloys have the Mg2 Ni major phase, but M（M=Co, Mn） substitution brings on some secondary phases,such as Mg Co2, Mg phases for M=Co, and Mn Ni, Mg phases for M=Mn. The substitution of M（M=Cu, Co, Mn）for Ni also makes a positive contribution to the cycle stability of the alloys in the following orders：（M=Cu） [（M=Co） [（M=Mn） for x = 1 and（M=Co） [（M=Mn）[（M=Cu） for x = 2–4. Meanwhile, it notably enhances the discharge capacity of the alloys in the sequence of（M=Co） [（M=Mn） [（M=Cu）. As for the high rate discharge ability, it visibly upgrades with the growing of M content for（M=Cu, Co）, while it grows at first and then declines for（M=Mn）.

关键词： Mg2Ni-type alloy Element substitution Melt spinning Nanocrystalline and amorphous Electrochemical characteristics

Hydrogen storage thermodynamic and kinetic characteristics of PrMg12-type alloys synthesized by mechanical milling

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Journal of Iron and Steel Research International 2017年第2期24卷 198-205页

作者： Jin-liang Gao Yan Qi Ya-qin Li Hong-wei Shang dong-liang zhao Yang-huan Zhang Weishan Cisri-Eare Earth Materials Co. Ltd. Jining 277600 Shandong China Department of Functional Material Research Central Iron and Steel Research Institute Beijing 100081 China

To improve the hydrogen storage performance of PrMg12-type alloys, Ni was adopted to replace partially Mg in the alloys. The PrMgllNi＋x wt.% Ni （x=100, 200） alloys were prepared via mechanical milling. The phase structures and morphology of the experimental alloys were in vestigated by X-ray diffraction and transmission electron microscopy. The results show that increasing milling time and Ni content accelerate the formation of nanocrystalline and amorphous structure. The gaseous hydrogen storage properties of the experimental alloys were determined by differential scanning calorimetry （DSC） and Sievert apparatus. In addition, increasing milling time makes the hydrogenation rates of the alloys augment firstly and decline subsequently and the dehydrogenation rate always increases. The maximum capacity is 5. 572 wt. % for the x = 100 alloy and 5. 829 wt. % for the x = 200 alloy, respectively. The enthalpy change （ △H ）, entropy change （△S） and the dehydrogenation activation energy （Exde） markedly lower with increasing the milling time and the Ni content due to the generation of nanocrystalline and amorphous structure.

关键词： PrMg12 alloy Mechanical milling Activation energy Hydrogen storage dynamics Thermodynamics

Self-lubricating CrVN Coating Strengthened via Multilayering with VN

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Journal of Iron and Steel Research International 2014年第5期21卷 545-550页

作者： Yue-xiu QIU Bo LI Jyh-wei LEE dong-liang zhao Central Iron and Steel Research Institute Advanced Technology and Materials Co. Ltd. Department of Materials Engineering Ming Chi University of Technology Center for Thin Film Technologies and Applications Ming Chi University of Technology

To improve the mechanical properties of self-lubricating chromium vanadium nitride （CrVN） coatings, va- nadium nitride （VN） is combined with CrVN to form multilayered CrVN/VN coatings through an in-line magnetron sputtering system. The strengthening effect of the period thickness on the mechanical and tribological properties is studied. X-ray diffractometer, low-angle X-ray reflectivity, scanning electron microscopy, atomic force microscopy, electron probe micro-analyzer and X-ray photoelectron spectroscopy are employed to characterize the microstructures and chemical composition. Nanoindentation and ball-on-disc tribo-tester are used in characterization of the mechanical and tribological properties. The CrVN/VN multilayer coatings demonstrate good lubrication property with coefficient of friction down to 0.23. Multilayering with VN, the hardness of CrVN jumps to 27.6 GPa with period thickness of 6 nm, which has an improvement of 5.1 GPa compared with that of 22.5 GPa from rule-of-mixture.

关键词： CrVN/VN multilayered coating mechanical property self-luhricating magnetron sputtering

Hydrogen storage thermodynamics and kinetics of as-cast Ce-Mg-Ni-based alloy

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Journal of Iron and Steel Research International 2024年第3期31卷 752-766页

作者： Yan Qi Xin Zhang Jun Li dong-liang zhao Shi-hai Guo Yang-huan Zhang Department of Functional Material Research Central Iron and Steel Research InstituteBeijing 100081China China Rare Earth New Material(Weishan)Co..Ltd. Jining 277600ShandongChina Collaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010Inner MongoliaChina

The reaction kinetics of alloys based on magnesium are known to be greatly improved by the partial substitution of Mg with rare earths and transition metals,particularly *** enhanced superficial hydrogen dissociation rate,the weakened Mg-H bond and the lower activation energy following element replacement are thought to be related to the better *** experimental alloys Ce5Mg_(95-x)Ni_(x)(x=5,10,15)were smelted by the vacuum induction *** phase transformation and structural evolution of experimental alloys before and after reaction with hydrogen were char-acterized by X-ray diffraction,scanning electron microscopy and transmission electron *** cast specimens contain CeMg_(12),Mg and Mg_(2)Ni phases,and the increase in Ni content results in an obvious growth of Mg_(2)Ni *** isothermal and non-isothermal hydrogenation and dehydrogenation kinetics of the experimental specimens were investi-gated using the Sievert apparatus,differential scanning calorimetry and thermal gravimetric *** activation energy may be calculated using the Arrhenius and Kissinger *** experimental alloys have been shown to have good activation properties,with a reversible hydriding and dehydriding capacities of around 5.0 wt.%in the first *** initial dehydrogenation temperature of MgH_(2) decreases from 557.5 to 537.7 K with changing Ni content from 5 to 15 at.%.The dehydrogenation activation energy also reduces from 77.09 to 62.96 kJ/mol,which explains the improved hydrogen storage performance caused by Ni *** can be shown that the impact of Ni on the decomposition enthalpy of MgH_(2) is quite modest,with the absolute enthalpy(ΔHr)only decreasing from 78.48 to 76.15 kJ/mol.

关键词： Mg-based alloy Ni content Hydrogen storage kinetics Thermodynamic property Activation energy

Properties of Mechanically Milled Nanocrystalline and Amorphous Mg–Y–Ni Electrode Alloys for Ni–MH Batteries

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Acta Metallurgica Sinica(English Letters) 2015年第7期28卷 826-836页

作者： Yang-Huan Zhang Ze-Ming Yuan Tai Yang Zhong-Hui Hou dong-liang zhao Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and Technology Department of Functional Material Research Central Iron and Steel Research Institute

Nanocrystalline and amorphous Mg2Ni-type Mg20-xYxNi10（x = 0,1,2,3 and 4） electrode alloys were fabricated using mechanical *** effects of the Y content and milling time on the microstructures and electrochemical performances of the alloys were investigated in detail.X-ray diffraction and transmission electron microscopy analyses revealed that the substitution of Y for Mg yields an obvious change in the phase composition and micro morphology of the *** the Y content x ≤ 1,the substitution of Y for Mg does not change the major phase Mg2 Ni,but with a further increase in the Y content,the major phase of the alloys transforms into the YMg Ni4 YMg3 phase.A nanocrystalline and amorphous structure can be obtained by mechanical milling,and the amorphisation degree of the alloy visibly increases with increased milling *** measurements indicate that the discharge capacity of the alloys first increases and then decreases with increasing Y content and milling *** substitution of Y for Mg dramatically ameliorates the cycle stability of the as-milled alloys,and the mechanical milling more or less impairs the cycle stability of the ***,the high rate discharge ability,electrochemical impedance spectrum,Tafel polarisation curves and potential step measurements indicate that the electrochemical kinetic properties of the as-milled alloys first increase and then decrease with increasing Y content and milling time.

关键词： Mg2Ni-type alloy Y substitution for Mg Milling time Electrochemical performance

Microstructure and damping properties of MnCuNiFeCe alloy

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Rare Metals 2016年第8期35卷 615-619页

作者： Feng-Shuang Lu Bin Wu Jian-Fu Zhang Ping Li dong-liang zhao Functional Materials Research Institute Central Iron and Steel Research Institute Beijing 100081 China Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China Beijing Key Laboratory of Precision Alloys Beijing 100081China

Mn-Cu alloys could exhibit high damping ability and excellent mechanical properties after proper heat treatment. In order to reduce the influence of impurity elements on damping capacity of Mn-Cu alloys, rare ele- ment cerium （Ce） was added into MnCuNiFe alloys. It is indicated that the contents of C, S and Si which have adverse effects on the damping capacity decrease and the grains are refined with the Ce content increasing. The microstructure of the MnCuNiFeCe alloy was investigated by X-ray diffraction （XRD）, scanning electron microscope （SEM） and transmission electron microscopy （TEM）. The damping ability （tane） of the alloy was characterized by dynamical mechanical analyzer （DMA）. It is found that the damping ability （tane） retains a very high level which is all above 0.05 from the temperature of -50 to 75 ℃ with the addition of Ce element. It is expected that the Ce alloying MnCuNiFe alloy with refined grains could find wide applications in the field of industry.

关键词： Mn-Cu alloy Damping properties Cerium

Influence of bias voltage on structure,mechanical and corrosion properties of reactively sputtered nanocrystalline TiN films

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Journal of Iron and Steel Research International 2017年第12期24卷 1223-1230页

作者： Chun-lin He Jin-lin Zhang Guo-feng Ma zhao-fu Du Jian-ming Wang dong-liang zhao Liaoning Provincial Key Laboratory of Advanced Materials Shenyang UniversityShenyang 110044LiaoningChina Research Institute of Functional Materials Central Iron&Steel Research InstituteBeijing 100081China

Nanocrystalline TiN films were prepared by DC reactive magnetron *** influence of substrate biases on structure,mechanical and corrosion properties of the deposited films was studied using X-ray diffraction,field emission scanning electron microscopy,nanoindentation and electrochemical *** deposited films have a columnar structure,and their preferential orientation strongly depends on bias *** preferential orientations change from（200）plane at low bias to（111）plane at moderate bias and then to（220）plane at relatively high *** H,elastic modulus E,H/E＊and H3/E＊2 ratios,and corrosion resistance of the deposited films increase first and then decrease with the increase in bias *** the best values appear at bias of-120 V,attributing to the film with a fine,compact and less defective *** demonstrates that there is a close relation among microstructure,mechanical and corrosion properties of the TiN films,and the film with the best mechanical property can also provide the most effective corrosion protection.

关键词： TiN film Nanocrystalline Bias voltage Microstructure Mechanical property Corrosion resistance