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Acta Metallurgica Sinica(English Letters) 2000年第4期13卷 937-943页

作者： j.M. Hu H.M. Meng d.B. Sun S.j. Zhang j.x. wu and d.j. yang beijing corrosion and protection center, open laboratory of corrosion, erosion and surface technology, university of science and technology beijing, beijing 100083, china beijing Univ of science and Technology Beijing China

Service life of two different oxide anodes in phenolsulfonic acid (PSA) solution was investigated by accelerated electrolysis. The durability of Ti/IrO_2+Ta_2 O_5 anode increased by the addition of SnO_2 in the mixed oxides. The degradation mechanisms of Ti/IrO_2+ Ta_2 O_5 and Ti/IrO_2 +Ta_2 O_5 +SnO+2 anodes were different. It was shown from the observation of scanning electron microscopy (SEM) and the electrochcmical measurement that, the deactivation of Ti/IrO_2 + Ta_2 O_5 anode was due to the build-up of an organic film on surface. The growth of the covered film on surface was restricted by addition of SnO_2, which resulted in increasing of the service life of anodes. The over-potential for oxygen evolution on Ti/IrO_2 +Ta_2 O_5 electrode increased after doping SnO_2, and the intermediate products of PSA building-up on the surface was much more rapidly oxidized. Meanwhile, a certain part of the surface oxide deposit entered into the solution leading to loss of oxides, which resulted in degradation of Ti/IroO_2 + Ta_2 O_5 anode containing SnO_2 component.

关键词： metal oxide anode IrO_2 + Ta_2 O_5 IrO_2 + Ta_2 O_5 +SnO_2 phenolsulfonic acid degradation

INVESTIGATION OF surface MORPHOLOGY, STRUCTURE ANd ELECTROCATALYTIC PROPERTIES FOR O_2 EVOLUTION OF TITANIUM BASEd IrO_2+Ta_2O_5 COATINGS

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Acta Metallurgica Sinica(English Letters) 2000年第3期13卷 849-856页

作者： j.M Hu j.x. wu H.M Meng YR. Zhu d.B. Sun and d.j. yang(beijing corrosion and protection center, open laboratory of corrosion, erosion and surface technology,university of science and technology beijing, beijing 100083, china) Univ of science and technology Beijing Beijing China

Titanium based IrO2 +Ta2O5 oxide anodes with different compositions and pyrolysis temperatures were prepared by termodecompoisition method. By using x-ray diffraction (xRd), the structure and texture coefficient of the coatings, TC(hkl), of IrO2 rutile crystal have been tested. It showed that, the crystallization processes of IrO2 and Ta2O5 in xIrO2 +(100-x) Ta2 O5 (x is in mol%) films affected and confined each *** the mixed system, IrO2 rutile phase existed as a solid solution with Ta, and attained the maximum solubility when x=70mol%, i.e. for the coating of 70% IrO2 +*** the coatings of low iridium content or at low preparing tem pemture, (110) and (101) pwtered orientations were dominant. However, preferred growth of IrO2 weakened with increasing either iridium content or temperature. Three typical surface morphologies were observed by using scanning electron tnicroscopy(SEM). The crystallite size of the mixed oxide coatings were finest for the the film of 70%IrO2 +30%Ta2O5,and decreased with the pyrolysis tempemture. As the results of the finest crystallite segregating on sudece and the maxitnum solid solubility of Ir and Ta component in deposits, the coatings with the composition of 70%IrO2 +Ta2O5 prepared at 450℃ presented the mdrimutn electrocatalgtic activitg for O2 evolution in 0. 5M H2SO4 *** to 550℃, Ti base suffered to oxidation resulting in decreasing anode conductivity,therefore, coatings performed a low activity.

关键词： titanium based coating anode iridium oxide tantalum oxide,solid solution crystallite orientation electrocatalytic activity

Effect of La on the corrosion Behavior and Mechanism of 3Ni Weathering Steel in a Simulated Marine Atmospheric Environment

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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 308-324页

作者： Gang Niu Rui Yuan R.d.K.Misra Na Gong Zhi-Hui Zhang Hao-xiu Chen Hui-Bin wu Cheng-jia Shang xin-Ping Mao Collaborative Innovation center of Steel technology University of Science and Technology BeijingBeijing100083China laboratory for Excellence in Advanced Steel Research Department of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX79968USA Institute of Materials Research and Engineering Agency for ScienceTechnologyand ResearchSingapore138634Singapore department of Materials science and Engineering University of TorontoTorontoONM5S 3E4Canada

The corrosion behavior and mechanism of 3Ni weathering steel in a simulated oceanic atmospheric environment are investigated in order to comprehend the impacts of La,as determined through electrochemical analysis and rust layer *** results of this study demonstrate that the addition of La enhances the corrosion resistance of 3Ni weathering steel in the marine atmospheric environment,thereby reducing the corrosion rate and improving the protection of the rust *** influence of La on corrosion resistance can be attributed to two primary ***,La functions as a grain refiner,minimizing the potential difference of the micro-regions on the substrate surface,thereby significantly reducing the corrosion of bare steel in the marine ***,La inhibits the process of Fe_(3)O_(4) oxidation back toγ-FeOOH during corrosion at the local site,thus decreasing the formation ofγ-FeOOH and enhancing the charge transfer *** research work may serve as a reference for expanding the application of rare earth elements in the field of weathering steel.

关键词： Weathering steel Rare earth Rust layer corrosion behavior corrosion resistance

Molecular dynamics Simulation of Porous Layer-enhanced dislocation Emission and Crack Propagation in Iron Crystal

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journal of Materials science & technology 2011年第11期27卷 1025-1028页

作者： d. Li F.Y. Meng x.Q. Ma L.j. Qiao W.Y. Chu department of Physics University of Science and Technology Beijing Beijing 100083 China corrosion and protection center Key Lab of Environmental Fracture （Ministry of Education） University of Science and Technology Beijing Beijing 100083 China

The internal stress induced by a porous layer or passive layer can assist the applied stress to promote dislocation emission and crack propagation, e.9. when the pipeline steel is buried in the soil containing water, resulting in stress corrosion cracking （SCC）. Molecular dynamics （Md） simulation is performed to study the process of dislocation emission and crack propagation in a slab of Fe crystal with and without a porous layer on the surface of the crack. The results show that when there is a porous layer on the surface of the crack, the tensile stress induced by the porous layer can superimpose on the external applied stress and then assist the applied stress to initiate crack tip dislocation emission under lowered stress intensity KI, or stress. To respond to the corrosion accelerated dislocation emission and motion, the crack begins to propagate under lowered stress intensity KI, resulting in SCC.

关键词： Molecular dynamics simulation dislocation emission Crack propagation Porouslayer Stress intensity

Leap of Li Metal Anodes from Coin Cells to Pouch Cells:Challenges and Progress

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Electrochemical Energy Reviews 2023年第1期6卷 39-86页

作者： Qian Wang Tiantian Lu Yuanbin xiao jianyang wu Lixiang Guan Lifeng Hou Huayun du Huan Wei xiaoda Liu Chengkai yang Yinghui Wei Henghui Zhou Yan Yu College of Materials science and Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina corrosion and protection Engineering technology Research center of Shanxi Province Taiyuan 030024ShanxiChina Key laboratory of Advanced Materials technology College of Materials Science and EngineeringFuzhou UniversityFuzhou 350108FujianChina College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China

Li metal anodes have attracted tremendous attention in the last decade because of their high theoretical capacities and low electrochemical ***,until now,there has only been limited success in improving the interfacial and structural stabilities and in realizing the highly controllable and large-scale fabrication of this emerging material;these limitations have posed great obstacles to further performing fundamental and applied studies in Li metal *** this review,we focus on summarizing the existing challenges of Li metal anodes based on the leap from coin cells to pouch cells and on outlining typical methods for designing Li metal anodes on demand;we controllably engineer their surface protection layers and structure sizes by encapsulating structured Li metal inside a variety of synthetic protection *** aim to provide a comprehensive understanding and serve as a strategic guide for designing and fabricating practicable Li metal anodes for use in pouch *** and opportunities regarding this burgeoning field are critically evaluated at the end of this review.

关键词： Li metal anode dendrites Pouch cells Air stability Energy density

Effect of hydrogen on the friction and wear of Ni-P coatings

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International journal of Minerals,Metallurgy and Materials 2010年第2期17卷 241-245页

作者： Qing-jun Zhou jin-xu Li wu-yang Chu corrosion and protection center Key Lab of Environmental Cracking Ministry of Education of China University of Science and Technology Beijing Beijing 100083 China R ＆ d center Baoshan Iron ＆ Steel Co. Ltd. Shanghai 201900 China

The effects of charging and outgassing on the friction and wear of Ni-P amorphous and nanocrystalline coatings were studied under ambient humidity and *** results indicate that hydrogen charging can greatly decrease the volume loss during friction and increase the wear ***,the wear durability can be restored after *** are many cracks on the brittle nanocrystalline before charging,and no crack appears after charging,but there are only a few cracks on the outgassed *** indicates that hydrogen charging can inhibit the crack formation during friction for the brittle Ni-P *** the charged sample,after the surface layer was removed by polishing,the wear track and the friction coefficient are consistent with those of an uncharged *** friction coefficient of the charged amorphous coating is very small within the first 140 s and then increases suddenly to the value corresponding to the uncharged *** absorbed surface layer lubricates the surface,reduces the friction coefficient,and improves the wear durability.

关键词： friction wear hydrogen Ni-P coating nanocrystalline

UiO-66 type metal-organic framework as a multifunctional additive to enhance the interfacial stability of Ni-rich layered cathode material

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journal of Energy Chemistry 2020年第11期29卷 378-386页

作者： Ruixue xue Na Liu Liying Bao Lai Chen Yuefeng Su Yun Lu jinyang dong Shi Chen Feng wu beijing Key laboratory of Environmental science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China beijing Institute of technology Chongqing Innovation center Chongqing 401120China

To effectively alleviate the surface structure degradation caused by electrolyte corrosion and transition metal(TM) dissolution for Ni-rich(Ni content > 0.6) cathode materials, porous Zirconium based metalorganic frameworks(Zr-MOFs, UiO-66) material is utilized herein as a positive electrode additive. UiO-66 owns tunable attachment sites and strong binding affinity, making itself an efficient defluorination agent to suppress the undesirable reactions caused by fluorine species. Besides, it can also relieve TMs dissolution and block the migration of TMs toward anode side since it’s a multifarious metal ions adsorbent,realizing both cathode and anode interface protection. Benefiting from these advantages, the UiO-66 assistant Ni-rich cathode achieves superior cycling stability. Particularly in full cell, the positive effects of this multifunctional additive are more pronounced than in the half-cell, that is after 400 cycles at 2 C,the capacity retention has doubled with the addition of UiO-66. More broadly, this unique application of functional additive provides new insight into the degradation mechanism of layered cathode materials and offers a new avenue to develop high-energy density batteries.

关键词： Ni-rich layered cathode Metal-organic framework additive Electrolyte corrosion Transition metal dissolution Interfacial stability