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Imide-pillared covalent organic framework protective films as stable zinc ion-conducting interphases for dendrite-free Zn metal anodes

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Journal of Energy Chemistry 2024年第10期97卷 470-477,I0010页

作者： Xiaoman Ye Xuemei Xiao Zhijing Wu Xin Wu Lin Gu Sheng Liu School of Chemical Engineering and Technology Sun Yat-sen UniversityZhuhai 519082GuangdongChina The Key lab.of Low-Carbon Chemistry&Energy Conservation of Guangdong Province Sun Yat-sen UniversityGuangzhou 510275GuangdongChina

The notorious growth of zinc dendrite and the water-induced corrosion of zinc metal anodes(ZMAs)restrict the practical development of aqueous zinc ion batteries(AZIBs).In this work,a zinc metallized,imide-pillared covalent organic framework(ZPC)protective film has been engineered as a stable Zn^(2+)ion-conducting interphase to modulate interfacial kinetics and suppress side reactions for *** to bare Zn,ZPC@Zn exhibits a higher Zn^(2+)ionic conductivity,a larger Zn^(2+)transference number,a lower electronic conductivity,a smaller desolvation activation energy and correspondingly a significant suppression of corrosion,hydrogen evolution and Zn ***,the ZPC@Zn||ZPC@Zn symmetric cell obtains a cycling lifespan over 3000 h under 5 mA cm^(-2)for 1 mA h cm^(-2).The ZPC@Zn||NH_(4)V_(4)O_(10)coin-type full battery delivers a specific capacity of 195.8 mA h g^(-1)with a retention rate of78.5%at 2 A g^(-1)after 1100 cycles,and the ZPC@Zn||NH_(4)V_(4)O_(10) pouch full cell shows a retention of70.1%in reversible capacity at 3 A g^(-1)after 1100 *** present incorporation of imide-linked covalent organic frameworks in the surface modification of ZMAs will offer fresh perspectives in the search for ideal protective films for the practicality of AZIBs.

关键词： Aqueous zinc ion batteries Zinc metal anodes Surface modification Covalent organic frameworks Imide linkage

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

Mechanistic Studies of Atmospheric corrosion Behavior of Al and Al-based Alloys in a Tropical Marine Environment

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Journal of Wuhan University of Technology(Materials Science) 2017年第3期32卷 633-639页

作者：崔中雨 GE Feng 李晓刚 ZHU Min XIAO Kui DONG Chaofang WANG Xin Institute of Materials Science and Engineering Ocean University of China corrosion and Protection Center University of Science and Technology Beijing lab.of Multi-phase Deposition and Erosion Zhejiang Sci-Tech University

Atmospheric corrosion behavior of pure Al 1050 A, 5A02 and 6A02 aluminum alloys exposed to a tropical marine environment for 4 years was investigated. Synergetic effect of Cl-deposition rate and time of wetness resulted in an abnormal increase in weight loss and a significant fluctuation in corrosion rate. Pitting corrosion occurred on the three metals. Pits on 5A02 alloy were easy to initiate and inclined to propagate laterally to form higher corrosion area and shallower corrosion pits, while pits on 6A02 alloy presented the opposite appearances. This was further confirmed by the cyclic polarization experiments.

关键词： aluminum atmospheric corrosion pitting corrosion

Characterization of low-purity clays for geopolymer binder formulation

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International Journal of Minerals,Metallurgy and Materials 2014年第6期21卷 609-619页

作者： Nasser Y.Mostafa Q.Mohsen A.El-maghraby Materials and corrosion lab.(MCL) Department of Chemistry Faculty of Science Taif University Department of Chemistry Faculty of Science Suez Canal University Refractory & Ceramics Department National Research CenterDokki 12622 Cairo Egypt

The production of geopolymer binders from low-purity clays was investigated. Three low-purity clays were calcined at 750℃ for 4 h. The calcined clays were chemically activated by the alkaline solutions of NaOH and Na2SiO3. The compressive strength was measured as a function of curing time at room temperature and 85℃. The results were compared with those of a pure kaolin sample. An amorphous aluminosilicate polymer was formed in all binders at both processing temperatures. The results show that, the mechanical properties depend on the type and amount of active aluminum silicates in the starting clay material, the impurities, and the processing temperature.

关键词： geopolymers microstructure X-ray diffraction compressive strength clay

Polarizable Additive with Intermediate Chelation Strength for Stable Aqueous Zinc‑Ion Batteries

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Nano-Micro Letters 2024年第5期16卷 41-55页

作者： Yuting Xia Rongao Tong Jingxi Zhang Mingjie Xu Gang Shao Hailong Wang Yanhao Dong Chang‑An Wang State Key lab.of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084People’s Republic of China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanPeople’s Republic of China

Aqueous zinc-ion batteries are promising due to inherent safety,low cost,low toxicity,and high volumetric ***,issues of dendrites and side reactions between zinc metal anode and the electrolyte need to be solved for extended storage and cycle ***,we proposed that an electrolyte additive with an intermediate chelation strength of zinc ion—strong enough to exclude water molecules from the zinc metal-electrolyte interface and not too strong to cause a significant energy barrier for zinc ion dissociation—can benefit the electrochemical stability by suppressing hydrogen evolution reaction,overpotential growth,and den-drite ***-sodium diethylene-triaminepentaacetic acid salt was selected for such a *** has a suitable chelating ability in aqueous solutions to adjust solvation sheath and can be readily polarized under electrical loading conditions to further improve the ***||Zn symmetric cells can be stably operated over 3500 h at 1 mA cm^(-2).Zn||NH4V4O10 full cells with the additive show great cycling stability with 84.6%capacity retention after 500 cycles at 1 A g^(-1).Since the additive not only reduces H2 evolution and corrosion but also modifies Zn2+diffusion and deposition,highlyreversible Zn electrodes can be achieved as verified by the experimental *** work offers a practical approach to the logical design of reliable electrolytes for high-performance aqueous batteries.

关键词： Aqueous zinc-ion batteries Electrolyte additives DTPA-Na Chelation strength

Imidazolium-Based Ionic Liquids as an Anticorrosive Agent for Completion Fluid Design

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Journal of Earth Science 2017年第5期28卷 949-961页

作者： Sugirtha Velusamy Sivabalan Sakthivel Lakshman Neelakantan Jitendra S.Sangwai Petroleum Engineering Program Department of Ocean EngineeringIndian Institute of Technology Madras Department of Chemistry Madras Christian College Electrochemistry and corrosion lab Department of Metallurgical and Materials EngineeringIndian Institute of Technology Madras

Most of the onshore and offshore oil and gas reservoirs are facing operational challenges due to high temperature and high salinity, thus requiring advanced techniques for realizing the ex- pected oil recovery with the use of specially designed chemicals. During oil and gas well development, completion fluids, which are solids-free liquids, are used to complete an oil or gas well. Completion flu- ids consisting of brines are primarily used for oil and gas well stabilization and are corrosive in nature. There is a need to develop additives to be added with completion fluids to address the corrosive nature. The present investigation involved the usage of two imidazolium ionic liquids （ILs） as corrosion inhibi- tors for mild steel in various completion brine （CaCI2, HCOOCs and ZnBr2） fluids. The study was per- formed using various techniques, such as, potentiodynamic polarization, weight loss measurements and exposure studies. All the above techniques showed promising results which indicated that the ILs as corrosion inhibitors used were of the mixed-type following both physisorption and chemisorption over the mild steel surface. Among the two inhibitors studied here, l-octyl-3-methyl imidazolium chlo- ride （[OMIM]^＋[CI]^-） with longer alkyl chain exhibited better inhibition efficiency and much lesser cor- rosion rate than 1-butyl-3-methyl imidazolium chloride （[BMIM]^＋[Ci]^-） with a shorter alkyl chain. The results obtained from various methodologies indicate that ionic liquids can be explored to develop anti-corrosive completion fluids suitable for oil and gas reservoirs.

关键词： completion fluid corrosion electrochemical ionic liquid inhibition mild steel.

Catalytic Peculiarity of Electrode/Polyelectrolyte Interfaces Toward CO_(2) Reduction

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Wuhan University Journal of Natural Sciences 2024年第4期29卷 293-294页

作者： MI Zhensheng WANG Gongwei ZHUANG Lin College of Chemistry and Molecular Sciences Hubei Key Lab of Electrochemical Power SourcesWuhan UniversityWuhan 430072HubeiChina

A prominent feature of modern electrochemical technologies,such as fuel cells,water electrolysis,and CO_(2) electrolysis,is to employ polyelectrolytes instead of liquid *** shift not only mitigates risks like corrosion and leaks associated with liquid electrolytes,but also facilitates the construction of zero-gap membrane electrode assembly(MEA)devices.

关键词： corrosion Catalytic electrode

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

Al diffusion coating on Mg alloy by a surface nanocrystallization enhanced CVD process

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International Journal of Smart and Nano Materials 2010年第4期1卷 288-293页

作者： Weiwei Chen Yedong He Wei Gao Beijing Key lab.for corrosion Erosion and Surface TechnologyThe University of Science and Technology BeijingBeijing 100083China Department of Chemical and Materials Engineering The University of AucklandPB 92019Auckland 1142New Zealand

Surface nanocrystallization by mechanical attrition was used to enhance the chemical vapor deposition *** aluminum(Al)diffusion coating was produced on AZ91 Mg alloy *** process was conducted at a relatively low temperature(400◦C)for a short time of 120 *** results indicated that a continuous and dense Mg17Al12 intermetallic coating with a thickness of∼8µm formed on the Mg alloy *** no corrosion was observed after the coated samples were immersed in 3 wt%NaCl solution for 6 h,reflecting a relatively good corrosion *** formation mechanism of the Al diffusion coating is discussed based on the experimental results.

关键词： mechanical attrition chemical vapor deposition(CVD) aluminum diffusion coating magnesium alloy corrosion resistance