Solid State Ionics

Research Portfolio - Dr. Jürgen Fleig

Research Topics

[Translate to English:] pictures of the deposition chamber

Thin films are essential in our research and enable us to study new materials, the influence of microstructure or defined model electrodes.

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[Translate to English:] sample sktech and elemental map representing the research topic

Lithium ion batteries are a key technology of our time, recognized for example by the 2019 Nobel Prize in Chemistry.

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[Translate to English:] sketch of the reaction path and data representing the research topic

Mixed electronic and ionic conductors (MIECs) are a special material class often employed for electrochemical energy conversion.

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[Translate to English:] pictures of measurement setups

Owing to the need of answering complicated scientific questions, we need novel experimental approaches to establish and test fundamental concepts to deeper understand solid state electrochemistry.

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[Translate to English:] sample sketch and data representing the research topic

The reaction rates of mixed conducting solid oxide fuel cell electrodes are often limited by the kinetics of oxygen exchange at the surface, e.g. either O2 incorporation and release, or H2 oxidation or H2O splitting.

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[Translate to English:] sample sketch, equivalent circuit and data representing the research topic

The characterization of electrochemical cells or cell constituents is one of our main research tasks.

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[Translate to English:] sample sketch with reaction mechanism representing the research topic

Solid oxide cells (SOCs) are electrochemical energy converters, whose components - as the name already suggests - consist of solid oxides.

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[Translate to English:] microscope picture of samples

The use of geometrically well-defined electrodes is one of the key features of our experimental approach. By designing the geometry of the investigated electrochemical system, one obtains the ability to operate an electrochemical model cell in a highly defined manner.

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[Translate to English:] sample sketch, reaction mechanism and data representing the research topic

Photoelectrochemical cells (PEC) typically use water as electrolyte and semiconducting electrodes, which are able to absorb light at a certain wavelength.

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[Translate to English:] data and sketch of reaction mechanism representing the research topic

From a mechanistic point of view, electrode reactions in solid state electrochemistry and in electrochemical systems with liquid electrolyte are significantly different.

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Funded Projects

[Translate to English:] Logo of the project Harvestore

Energy HarveStorers for Powering the Internet of Things.

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