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Alternative Strategy for Development of Dielectric Calcium Copper Titanate‑Based Electrolytes for Low‑Temperature Solid Oxide Fuel Cells

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Nano-Micro Letters 2025年第1期17卷 310-332页

作者： Sajid Rauf Muhammad Bilal Hanif Zuhra Tayyab Matej Veis MAKYousaf Shah Naveed Mushtaq Dmitry Medvedev Yibin Tian Chen Xia Martin Motola Bin Zhu College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Department of Inorganic Chemistry Faculty of Natural SciencesComenius University BratislavaIlkovicova684215 BratislavaSlovakia Energy Storage Joint research Center School of Energy and EnvironmentSoutheast UniversityNanjing 210096People’s Republic of China Hydrogen Energy laboratory Ural Federal University620002 EkaterinburgRussia laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes Institute of High Temperature Electrochemistry620066 EkaterinburgRussia School of Microelectronics Hubei UniversityWuhan 430062People’s Republic of China

The development of low-temperature solid oxide fuel cells(LT-SOFCs)is of significant importance for realizing the widespread application of *** has stimulated a substantial materials research effort in developing high oxide-ion conductivity in the electrolyte layer of *** this context,for the first time,a dielectric material,CaCu_(3)Ti_(4)O_(12)(CCTO)is designed for LT-SOFCs electrolyte application in this *** individual CCTO and its heterostructure materials with a p-type Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ)(NCAL)semiconductor are evaluated as alternative electrolytes in LT-SOFC at 450–550℃.The single cell with the individual CCTO electrolyte exhibits a power output of approximately 263 mW cm^(-2) and an open-circuit voltage(OCV)of 0.95 V at 550℃,while the cell with the CCTO–NCAL heterostructure electrolyte capably delivers an improved power output of approximately 605 mW cm^(-2) along with a higher OCV over 1.0 V,which indicates the introduction of high hole-conducting NCAL into the CCTO could enhance the cell performance rather than inducing any potential short-circuiting *** is found that these promising outcomes are due to the interplay of the dielectric material,its structure,and overall properties that led to improve electrochemical mechanism in CCTO–***,density functional theory calculations provide the detailed information about the electronic and structural properties of the CCTO and NCAL and their heterostructure CCTO–*** study thus provides a new approach for developing new advanced electrolytes for LT-SOFCs.

关键词： LT-SOFCs Dielectric CaCu_(3)Ti_(4)O_(12) Semiconductor Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ) Ionic conductivity Heterostructure electrolyte

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Corrosion Protection of Electro-Galvanized Steel by Green Conversion Coatings

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Journal of Rare Earths 2007年第5期25卷 537-543页

作者： Mirghasem Hosseini Habib Ashassi-Sorkhabi Heshmat Allah Yaghobkhani Ghiasvand electrochemistry research laboratory Physical Chemistry Department Chemistry Faculty University of Tabriz

A A cerium-based chemical conversion process was studied. First, zinc coating obtained from a free-cyanide alkaline bath, with derivative of imidazol with new brightener, was investigated, zinc-plated steel specimens were treated with a solution of 50 mmol· L^-1 Ce（NO3 ）3 The corrosion behavior of bare and treated mild galvanized steel was evaluated during exposure to 0.5 mol · L^-1 NaCl for different immersion time, using Tafel polarization curves and electrochemical impedance spectroscopy （EIS） measurements. The surface morphology of the coating was studied using scanning electron microscopy （SEM）. The composition and chemical percent of the coating were examined by X-ray dispersion energy （EDAX）. The results of these measurements showed that the newly developed cerium-based conversion coating process was a promising candidate for replacing the conventional chromate treatments used at present for galvanized steel.

关键词： green coating free-cyanide alkaline bath EIS electro-galvanized rare earths

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Synthesis, Characterization and Electrochemical Study of Graphene Oxide-Multi Walled Carbon Nanotube-Manganese Oxide-Polyaniline Electrode as Supercapacitor

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Journal of Materials Science & Technology 2016年第8期32卷 763-773页

作者： Mir Ghasem Hosseini Elham Shahryari electrochemistry research laboratory Department of Physical Chemistry Chemistry Faculty University of Tabriz

The synthesis of graphene oxide-multi walled carbon nanotube-manganese oxide-polyaniline namely （GMMP） nanocomposite for application in supercapacitor devices was investigated. Morphology of the nanocomposites was studied by X-ray diffraction （XRD）, Fourier transform infrared （FT-IR） spectrosco- py, scanning electron microscopy （SEM）, transmission electron microscopy （TEM） and energy dispersive X-ray micmanalysis （EDX）. The electrochemical properties of nanocomposite based electrodes were in- vestigated by cyclic voltammetry （CV）, galvanostatic charge-discharge and electrochemical impedance spectroscopy （EIS） techniques in 0.5 mol/L Na2SO4. The specific capacitances of 173.00, 127.85, 87.50, 58.65 and 12.00 （mF cm^-2） were obtained for GMMP, GMP （GO-MWCNT-PANI）, GMM （GO-MWCNT-MnO2）, GM （GO-MWCNT） and G （GO） at a scan rate of 10 mV s^-1, respectively. Also, GMMP nanocomposite re- tained 90% initial capacitance after 200 cycle of charge-discharge. The good electrochemical response of this nanocomposite is due to the combination of the electrical double layer capacitance of GO and MWCNT and the gradual introduction of pseudo-capacitance through the redox processes of PANI, -COOH, -OH （in MWCNT-COOH, GO-COOH and GO-OH） and MnO2. This revealed the synergistic effect of PANI, MnO2, -OH -COOH on the carbon based support.

关键词： Supercapacitor Graphene oxide In-situ polymerization Electrochemical Impedance Spectroscopy (EIS) Polyaniline

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Improvement of electrochemical and electrical properties of LiFePO_4 coated with citric acid

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Rare Metals 2016年第4期35卷 303-308页

作者： Majid Talebi-Esfandarani Oumarou Savadogo laboratory of New Materials for electrochemistry and Energy Polytechnique Montreal

LiFePO4 was synthesized using hydrothermal method and coated with different amounts of citric acid as carbon source. The samples were characterized by X-ray powder diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscope （TEM）, surface area measurement--Brunauer-Emmett-Teller （BET）, dis- charge capability, cyclic voltammetry （CV）, and electrochemical impedance spectroscopy （EIS）. The results show that the quality and thickness of the carbon coating on the surface of LiFePO4 particles are very important. The optimum carbon content （about 30 wt%） can lead to a more uniform carbon distribution. Electrochemical results show that the samples containing 20 wt%, 30 wt%, 40 wt%, and 50 wt% carbon deliver a discharge capacity of 105, 167, 151, and 112 mAh.g-1, respectively, at the rate of 0.1C. The increase of carbon content leads to the decrease of discharge capacity of LiFePO4/C, owing to the fact that excess carbon delays the diffusion of Li＋ through the carbon layers during charge/discharge procedure. The LiFePO4/C with low carbon content exhibits poor electrochemical performance because of its low electrical conductivity. Therefore, the amount of carbon must be optimized in order to achieve excellent electrochemical performance of LiFePOjC for its application in a lithium ion battery.

关键词： LiFePO4 Lithium ion batteries Carbon coating

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Manipulating interphases in batteries

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National Science Review 2017年第1期4卷 19-20页

作者： Kang Xu electrochemistry Branch Sensor and Electron Devices DirectorateUS Army Research Laboratory

Charge-transfer across electrolyte/electrode interfaces dictates kinetics and reversibility of cell reactions within electrochemical *** the device operates beyond the thermodynamic stability limits of electrolytes,‘interphases’form at the interfaces[1,2].In the pursuit of new batery chemistries that promise ambitious energy densities,electrolytes

关键词： cell In SEI Manipulating interphases in batteries

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Effect of TiO_2 nanoparticles on hydrogen evolution reaction activity of Ni coatings

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International Journal of Minerals,Metallurgy and Materials 2018年第4期25卷 472-479页

作者： Revanna Kullaiah Liju Elias Ampar Chitharanjan Hegde electrochemistry research Lab Department of Chemistry National Institute of Technology Karnataka

The electrocatalytic activity of electrodeposited Ni and Ni–TiO2 coatings with regard to the alkaline hydrogen evolution reaction（HER） was investigated. The Ni coatings were electrodeposited from an acid chloride bath at different current densities, and their HER activities were examined in a 1.0-mol·L^-1 KOH medium. The variations in the HER activity of the Ni coatings with changes in surface morphology and composition were examined via the electrochemical dissolution and incorporation of nanoparticles. Electrochemical analysis methods were used to monitor the HER activity of the test electrodes; this activity was confirmed via the quantification of gases that evolved during the analysis. The obtained results demonstrated that the Ni–TiO2 nanocomposite test electrode exhibited maximum activity toward the alkaline HER. The surface appearance, composition, and the phase structure of all developed coatings were analyzed using scanning electron microscopy（SEM）, energy dispersive spectroscopy（EDS）, and X-ray diffraction（XRD）, respectively. The improvement in the electrocatalytic activity of Ni–TiO2 nanocomposite coating toward HER was attributed to the variation in surface morphology and increased number of active sites.

关键词： coatings electrodeposition nanocomposite electrocatalysis

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Advanced materials for aqueous supercapacitors in the asymmetric design

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Progress in Natural Science:Materials International 2015年第6期25卷 527-544页

作者： Muniyandi Rajkumar Chun-Tsung Hsu Tzu-Ho Wu Ming-Guan Chen Chi-Chang Hu laboratory of electrochemistry and Advanced Materials Department of Chemical EngineeringNational Tsing Hua University

Supercapacitors have been recognized as one of the promising energy storage devices in the future energy *** this perspective,rapid progress is made in the development of fundamental and applied aspects of *** techniques have been developed specifically to estimate the specific *** efforts have been made in the literature to increase the specific capacitance of electrode ***,researchers pay more attention on designing supercapacitors of asymmetric type with extending cell voltage and dissimilar materials with complementary working *** try to increase the specific energy of asymmetric supercapacitors(ASCs).Conversely,it is still a challenge to find a suitable operation conditions for ASCs in various designs,especially for the one with battery type *** this review,we describe our recent research works and other reports on the preparation of various nanostructured electrode materials and the performances of both symmetric and asymmetric ***,we demonstrate effects of charge balance on the capacitive performances of ASCs which consist of one electrode material of the battery type and one capacitive *** also demonstrate how to evaluate the charge capacities of both positive and negative electrode materials for this ASC application.

关键词： Transition metal oxides Chemical Synthesis Aqueous electrolyte Super capacitors Asymmetric Design

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Recycling of spent lithium-ion batteries as a sustainable solution to obtain raw materials for different applications

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Journal of Energy Chemistry 2023年第4期79卷 118-134页

作者： V.M.Leal J.S.Ribeiro E.L.D.Coelho M.B.J.G.Freitas Federal University of Espírito Santo Department of ChemistryLaboratory of Electrochemistry and ElectrochemistryAv.Fernando Ferrari514VitóriaES 29075-910Brazil

Lithium-ion batteries(LIBs)containing graphite as anode material and LiCoO_(2),LiMn_(2)O_(4),and LiNi_(x)Mn_(y)Co_(z)O_(2) as cathode materials are the most used worldwide because of their high energy density,capacitance,durability,and ***,such widespread use implies the generation of large amounts of electronic *** is estimated that more than 11 million ton of LIBs waste will have been generated by *** recycling can contribute to minimizing environmental contamination and reducing production costs through the recovery of high-value raw materials such as lithium,cobalt,and *** most common processes used to recycle spent LIBs are pyrometallurgical,biometallurgical,and *** the current scenario,it is necessary to develop environmentally friendly methods to recycle batteries and synthesize materials with multiple technological *** study presents a review of industrial and laboratory processes for recycling spent LIBs and producing materials that can be used in new batteries,energy storage devices,electrochemical sensors,and photocatalytic reactions.

关键词： Li-ion batteries Recycling Cathode Battery Hydrometallurgical Pyrometallurgical

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Leaching of complex sulphide concentrate in acidic cupric chloride solutions

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中国有色金属学会会刊：英文版 2007年第2期17卷 423-428页

作者： M.TCHOUMOU M.ROYNETTE Faculty of Science Marien Ngouabi University laboratory of Applied electrochemistry EHICS Louis Pasteur University

The chemical analysis of a complex sulphide concentrate by emission spectrometry and X-ray diffraction shows that it contains essentially copper, lead, zinc and iron in the form of chalcopyrite, sphalerite and galena. A small amount of pyrite is also present in the ore but does not be detected with X-ray diffraction. The cupric chloride leaching of the sulphide concentrate at various durations and solid/liquid ratios at 100 ℃ shows that the rate of dissolution of the ore is the fastest in the first several hours, and after 12 h it does not evolve significantly. If oxygen is excluded from the aqueous cupric chloride solution during the leaching experiment at 100 ℃, the pyrite in the ore will not be leached. The determination of principal dissolved metals in the leaching liquor by flame atomic absorption spectrometry, and the chemical analysis of solid residues by emission spectrometry and X-ray diffraction allow to conclude that the rate of dissolution of the minerals contained in the complex sulphide concentrate are in the order of galena >sphalerite>chalcopyrite.

关键词：酸性氯化铜溶液复合硫化物精矿浸出溶出速度

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Removal of ofloxacin antibiotic using heterogeneous Fenton process over modified alginate beads

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Journal of Environmental Sciences 2016年第7期28卷 84-93页

作者： Hana Titouhi Jamel-Eddine Belgaied laboratory of Analytical Chemistry and electrochemistry National Institute of Applied Sciences and Technology INSAT Carthage University

The aim of this work is to study the heterogeneous oxidative degradation of ofloxacin antibiotic using a composite material prepared from sodium alginate and cyclohexane dinitrilo tetraacetic acid（CDTA）. The characterization tests indicated the successful incorporation of metal chelator and iron. It was also demonstrated that the synthesized beads are mesoporous. The influence of several experimental parameters（i.e.： H2O2 dose,working temperature, beads loading and initial drug concentration） on the process performances was evaluated. The reaction temperature significantly affects the drug conversion efficiency. It was also observed that the synthesized material was efficient toward the target antibiotic degradation in the presence of small quantities of hydrogen peroxide. Under optimum conditions（0.05 g of granules, initial drug concentration = 10 mg/L,25 μL of 10 mmol/L H2O2）, conducted in a batch reaction, 94% degradation of ofloxacin was reached. The results also indicate that the composite material showed a reasonable stability;a relatively low decrease of activity after four successive runs（only 9%） and a negligible iron leaching（0.8%） have been observed. The synthesized composite material offered interesting advantages in terms of simplicity, good stability, ease of recovery from the liquid medium after use and its efficiency in the presence of low quantities of oxidant. It constitutes a good candidate in the water treatment area.

关键词： Sodium alginate CDTA Heterogeneous Fenton Ofloxacin Degradation

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