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This thesis introduces (i) amendments to basic electrochemical measurement techniques in the time and frequency domain suitable for electrochemical energy conversion systems like fuel cells and batteries, which enable shorter measurement times and improved precision in both measurement and parameter identification, and (ii) a modeling approach that is able to simulate a technically relevant system just by information gained through static and impedance measurements of laboratory size cells.

Lithium-Ion Battery (LIB) --- Solid Oxide Fuel Cell (SOFC) --- Electrochemical Impedance Spectroscopy (EIS)

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Solid oxide fuel cells (SOFC) achieve high efficiencies, the lower the internal electrochemical losses are. This work investigates insulating secondary phases at the cathode/electrolyte interface that are formed during fabrication. Full cells and model systems are electrochemically characterized, analyzed by electron microscopy and reconstructed by tomography. A FEM model reveals performance limiting factors. As a result, an optimized production routine is proposed.

elektrochemische Impedanzspektroskopie --- electrochemical impedance spectroscopy --- FEM-Modellierung --- korrelative Tomographie --- secondary phase identification --- solid oxide fuel cell (SOFC) --- Zweitphasenidentifikation --- correlative tomography --- FEM modeling --- Hochtemperatur-Brennstoffzelle (SOFC)

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The dynamic development of global industry and growing demand for new material technologies generate constantly increasing problems regarding premature material degradation and the requirement to determine corrosion mechanisms and to develop new protection/evaluation approaches. Corrosion resistance depends on numerous determinants, such as material structure, chemistry, and complex environmental factors. It is highly challenging to obtain consensus between high corrosion resistance and an economic approach. On the other hand, inadequate levels of corrosion control create serious hazards to life and the environment. This Special Issue, “Recent Advances in Corrosion Science”, brings together fourteen articles and one review, providing a snapshot of the recent activity and development in this field. The book contains studies related to the development of new corrosion-resistant alloys and the determination of microstructure-dependent properties; it also provides an insight into recent approaches towards anticorrosion technologies, such as corrosion inhibitors and composite and metal protective coatings.

Research & information: general --- corrosion inhibitor --- electrochemical --- AFM --- CO2 corrosion --- austempered gray cast iron --- austempering temperature --- microstructure --- potentiodynamic polarization --- electrochemical impedance spectroscopy --- titanium-based alloys --- passivity breakdown --- pitting corrosion --- carbon steel --- indazole derivatives --- electrochemistry --- DFT --- thermal diffusion coatings --- grade 10.9 bolts --- corrosion resistance --- thermal deformation parameters --- 35CrMoV steel --- grain size --- electrochemical corrosion --- aluminum alloys --- phase characterization --- de-alloying --- titanium aluminides --- oxidation --- non-isothermal --- mechanism --- internal oxidation --- pre-corrosion pits --- residual fatigue life --- 42CrMo steel --- stress intensity factor --- aluminum alloy --- alkaline environment --- impedance analysis --- adsorption --- dihydroxybenzene --- magnesium --- immersion test --- polarization --- cleaning --- bond coat --- PDC coatings --- fillers --- EC-AFM --- corrosion --- metallic materials --- metal coatings --- nickel --- composite coatings --- electrodeposition --- XPS --- electrochemical impedance spectroscopy (EIS) --- boron-doped diamond --- high-temperature treatment --- surface oxidation --- microstructure defects --- electrochemical activity --- corrosion inhibitor --- electrochemical --- AFM --- CO2 corrosion --- austempered gray cast iron --- austempering temperature --- microstructure --- potentiodynamic polarization --- electrochemical impedance spectroscopy --- titanium-based alloys --- passivity breakdown --- pitting corrosion --- carbon steel --- indazole derivatives --- electrochemistry --- DFT --- thermal diffusion coatings --- grade 10.9 bolts --- corrosion resistance --- thermal deformation parameters --- 35CrMoV steel --- grain size --- electrochemical corrosion --- aluminum alloys --- phase characterization --- de-alloying --- titanium aluminides --- oxidation --- non-isothermal --- mechanism --- internal oxidation --- pre-corrosion pits --- residual fatigue life --- 42CrMo steel --- stress intensity factor --- aluminum alloy --- alkaline environment --- impedance analysis --- adsorption --- dihydroxybenzene --- magnesium --- immersion test --- polarization --- cleaning --- bond coat --- PDC coatings --- fillers --- EC-AFM --- corrosion --- metallic materials --- metal coatings --- nickel --- composite coatings --- electrodeposition --- XPS --- electrochemical impedance spectroscopy (EIS) --- boron-doped diamond --- high-temperature treatment --- surface oxidation --- microstructure defects --- electrochemical activity

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The dynamic development of global industry and growing demand for new material technologies generate constantly increasing problems regarding premature material degradation and the requirement to determine corrosion mechanisms and to develop new protection/evaluation approaches. Corrosion resistance depends on numerous determinants, such as material structure, chemistry, and complex environmental factors. It is highly challenging to obtain consensus between high corrosion resistance and an economic approach. On the other hand, inadequate levels of corrosion control create serious hazards to life and the environment. This Special Issue, “Recent Advances in Corrosion Science”, brings together fourteen articles and one review, providing a snapshot of the recent activity and development in this field. The book contains studies related to the development of new corrosion-resistant alloys and the determination of microstructure-dependent properties; it also provides an insight into recent approaches towards anticorrosion technologies, such as corrosion inhibitors and composite and metal protective coatings.

corrosion inhibitor --- electrochemical --- AFM --- CO2 corrosion --- austempered gray cast iron --- austempering temperature --- microstructure --- potentiodynamic polarization --- electrochemical impedance spectroscopy --- titanium-based alloys --- passivity breakdown --- pitting corrosion --- carbon steel --- indazole derivatives --- electrochemistry --- DFT --- thermal diffusion coatings --- grade 10.9 bolts --- corrosion resistance --- thermal deformation parameters --- 35CrMoV steel --- grain size --- electrochemical corrosion --- aluminum alloys --- phase characterization --- de-alloying --- titanium aluminides --- oxidation --- non-isothermal --- mechanism --- internal oxidation --- pre-corrosion pits --- residual fatigue life --- 42CrMo steel --- stress intensity factor --- aluminum alloy --- alkaline environment --- impedance analysis --- adsorption --- dihydroxybenzene --- magnesium --- immersion test --- polarization --- cleaning --- bond coat --- PDC coatings --- fillers --- EC-AFM --- corrosion --- metallic materials --- metal coatings --- nickel --- composite coatings --- electrodeposition --- XPS --- electrochemical impedance spectroscopy (EIS) --- boron-doped diamond --- high-temperature treatment --- surface oxidation --- microstructure defects --- electrochemical activity --- n/a

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The recent global events of the SARS-CoV-2 pandemic in 2020 have alerted the world to the urgent need to develop fast, sensitive, simple, and inexpensive analytical tools that are capable of carrying out a large number of quantitative analyses, not only in centralized laboratories and core facilities but also on site and for point-of-care applications. In particular, in the case of immunological tests, the required sensitivity and specificity is often lacking when carrying out large-scale screening using decentralized methods, while a centralized laboratory with qualified personnel is required for providing quantitative and reliable responses. The advantages typical of electrochemical and optical biosensors (low cost and easy transduction) can nowadays be complemented in terms of improved sensitivity by combining electrochemistry (EC) with optical techniques such as electrochemiluminescence (ECL), EC/surface-enhanced Raman spectroscopy (SERS), and EC/surface plasmon resonance (SPR). This Special Issue addresses existing knowledge gaps and aids in exploring new approaches, solutions, and applications for opto-electrochemical biosensors in the quantitative detection of disease markers, such as cancer biomarkers proteins and allergens, and pathogenic agents such as viruses. Included are seven peer-reviewed papers that cover a range of subjects and applications related to the strategies developed for early diagnosis.

Research & information: general --- Biology, life sciences --- Biochemistry --- gold nanoparticles --- doxycycline --- tetracycline --- SPR biosensor --- signal amplification --- clinical diagnosis --- microRNA --- electrochemical biosensor --- catalysts --- RedOx indicator --- cancer biomarker --- electrochemical immune platform --- human ST2 --- plasma --- pancreatic cancer --- collagen type I --- 4,4'-thiobisbenzenethiol --- nanogold --- electrochemical impedance spectroscopy --- surface plasmon resonance --- half antibody --- medical diagnostic devices --- peptide --- antifouling --- protease --- biomarker --- bioreceptor --- SARS-CoV-2 detection --- nasopharyngeal swab --- saliva --- serum --- droplets --- amperometric biosensor --- neural esterase --- acetylcholinesterase --- inhibition --- organophosphate --- design --- optimization --- mathematical model --- flux control --- dimensionless --- gold nanoparticles --- doxycycline --- tetracycline --- SPR biosensor --- signal amplification --- clinical diagnosis --- microRNA --- electrochemical biosensor --- catalysts --- RedOx indicator --- cancer biomarker --- electrochemical immune platform --- human ST2 --- plasma --- pancreatic cancer --- collagen type I --- 4,4'-thiobisbenzenethiol --- nanogold --- electrochemical impedance spectroscopy --- surface plasmon resonance --- half antibody --- medical diagnostic devices --- peptide --- antifouling --- protease --- biomarker --- bioreceptor --- SARS-CoV-2 detection --- nasopharyngeal swab --- saliva --- serum --- droplets --- amperometric biosensor --- neural esterase --- acetylcholinesterase --- inhibition --- organophosphate --- design --- optimization --- mathematical model --- flux control --- dimensionless