Michael Stelter

Friedrich Schiller University Jena

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O. Pätzold

TU Bergakademie Freiberg

Gerhard Cordier

Technical University of Darmstadt

Patrick Braeutigam

Friedrich Schiller University Jena

Alexandros Charitos

TU Bergakademie Freiberg

Matthias Schulz

Fraunhofer Institute for Ceramic Technologies and Systems

Markus A. Reuter

SMS Siemag (Germany)

Marcus Franke

Friedrich Schiller University Jena

Beate Fankhänel

TU Bergakademie Freiberg

Karl Skadell

Fraunhofer Institute for Ceramic Technologies and Systems

Herbert Schäfer

Darmstadt University of Applied Sciences

Cooperative Institutions

TU Bergakademie Freiberg

Society for Chemical Engineering and Biotechnology

Friedrich Schiller University Jena

Fraunhofer Institute for Ceramic Technologies and Systems

TU Dresden

Karlsruhe Institute of Technology

Helmholtz-Zentrum Dresden-Rossendorf

University of Stuttgart

Centre National de la Recherche Scientifique

Max Planck Society

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ChemInform Abstract: CALCIUM ANTIMONIDOALUMINATE (CA3ALSB3) AND CALCIUM BISMUTHIDOALUMINATE (CA5AL2BI6), TWO NEW ZINTL PHASES WITH CHAIN ANIONS

Chemischer Informationsdienst (1984)

Gerhard Cordier Henry F. Schaefer Michael Stelter

Abstract werden aus stöchiometrischen Elementgemengen unter Ar im Korundtiegel durch Erhitzen auf 1000°C dargestellt.

Chain (unit)

10.1002/chin.198441007

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Citations (0)

Determining the Bubble Dynamics of a Top Submerged Lance Smelter

The minerals, metals & materials series (2022)

Avinash Kandalam Michael Stelter Markus Reinmöller Markus A. Reuter Alexandros Charitos

Submersion (mathematics)

Inert

10.1007/978-3-030-92563-5_57

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Citations (2)

Wettability of AlSi5Mg on Spodumene

Metallurgical and Materials Transactions B (2015)

Beate Fankhänel Michael Stelter Claudia Voigt Christos G. Aneziris

Spodumene

10.1007/s11663-015-0307-0

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Citations (4)

From High‐ to Low‐Temperature: The Revival of Sodium‐Beta Alumina for Sodium Solid‐State Batteries

Batteries & Supercaps (2021)

Micha P. Fertig Karl Skadell Matthias Schulz Cornelius Dirksen Philipp Adelhelm

Abstract Sodium‐based batteries are promising post lithium‐ion technologies because sodium offers a specific capacity of 1166 mAh g −1 and a potential of −2.71 V vs. the standard hydrogen electrode. The solid electrolyte sodium‐beta alumina shows a unique combination of properties because it exhibits high ionic conductivity, as well as mechanical stability and chemical stability against sodium. Pairing a sodium negative electrode and sodium‐beta alumina with Na‐ion type positive electrodes, therefore, results in a promising solid‐state cell concept. This review highlights the opportunities and challenges of using sodium‐beta alumina in batteries operating from medium‐ to low‐temperatures (200 °C–20 °C). Firstly, the recent progress in sodium‐beta alumina fabrication and doping methods are summarized. We discuss strategies for modifying the interfaces between sodium‐beta alumina and both the positive and negative electrodes. Secondly, recent achievements in designing full cells with sodium‐beta alumina are summarized and compared. The review concludes with an outlook on future research directions. Overall, this review shows the promising prospects of using sodium‐beta alumina for the development of solid‐state batteries.

Fast ion conductor

10.1002/batt.202100131

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Citations (44)

Recycalyse – New Sustainable and Recyclable Catalytic Materials for Proton Exchange Membrane Electrolysers

Chemie Ingenieur Technik (2024)

Julia Melke Annabelle Maletzko Eduardo Daniel Gomez Villa Aline Bornet Gustav K. H. Wiberg

Abstract Within the Recycalyse project different research organization and industrial partners worked together to develop catalysts for the oxygen evolution reaction for proton exchange membrane electrolysis that reduce the use of critical raw materials. The catalysts are applied to polymer electrolyte membranes via a direct coating process and tested both in single cells and at stack level. In order to reduce the dependence on material imports in Europe in the long term, recycling is considered for the catalysts, electrodes and the entire system.

Electrolytic process

10.1002/cite.202300143

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Citations (2)

Determination of Chemical Oxygen Demand with electrochemical methods: A review

Chemical Engineering Journal Advances (2024)

Samira Lambertz Marcus Franke Michael Stelter Patrick Braeutigam

The electrochemical determination of chemical oxygen demand (COD) presents a promising alternative to the standard method, addressing concerns related to toxic chemicals, extended measurement time, and automation challenges. This review aims to comprehensively examine the current state of research and offer insights for future advancements. The discussion spans three key areas: working electrode materials (including Cu-based, carbon-based, Boron-Doped Diamond (BDD), and PbO2), electrochemical methods (amperometry, coulometry, and voltammetry), and measurement setups. Special emphasis is placed on exploring the dependencies of the amperometric method on organic compounds and discerning the distinct application scopes of various electrochemical methods. Future perspectives are outlined for each research aspect. The review also delves into the evaluation of developed methods, proposing measures for a more standardized and cohesive evaluation approach. Through these efforts, the review seeks to propel research towards the practical application of electrochemical COD determination.

Coulometry

Amperometry

Electroanalytical method

10.1016/j.ceja.2024.100615

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Citations (4)

Evaluation of soft chemistry methods to synthesize Gd-doped CaMnO3−δ with improved thermoelectric properties

Materials Science and Engineering B (2017)

Romy Löhnert Michael Stelter J. Töpfer

Soft chemistry

Figure of Merit

10.1016/j.mseb.2017.06.014

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Citations (29)

Using polyethylene glycols as alternative inhibitors in copper electrorefining

JOM (2002)

Michael Stelter Hartmut Bombach N. S. Nesterov

Electrowinning

Thermal Stability

10.1007/bf02701654

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Citations (9)

Ethanol in simple SOFC Systems

ECS Transactions (2009)

Manuela Breite Matthias Jahn Thomas Pfeifer Michael Stelter Jürgen Bernard

Ethanol is well suited as an energy carrier for fuel cells as it has a high energy density; it is non toxic and simple to transport and store. If used in SOFCs, one major task is to produce synthesis gas from it with a high percentage of H2 and CO. Dry partial oxidation (POX) is the simplest reforming principle for SOFCs. Thermodynamic calculations showed that simple SOFC setups should be possible with an ethanol POX reformer. Thermodynamic equilibria of ethanol partial oxidation were calculated with respect to coke formation. It has been shown that with air ratios above λ = 0.28 and 96 Vol% ethanol / 4 Vol% water sooting does not occur for temperatures above 700{degree sign}C. Currently, the most important task is to identify effective catalysts for the partial oxidation of ethanol. Experiments with low cost base metals like nickel on aluminium oxide showed great promise for ethanol conversion.

Partial oxidation

Chemical energy

10.1149/1.3205633

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Citations (0)

Sonoelectrochemical degradation of the anti-inflammatory drug diclofenac in water

Chemical Engineering Journal (2015)

Pascal Finkbeiner Marcus Franke Franziska Anschuetz Anna Ignaszak Michael Stelter

Diclofenac

Degradation

Luminol

10.1016/j.cej.2015.03.070

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Citations (63)