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ElektroBak – Innovative Materials and Concepts for Microbial Electrochemical Systems

Contact Person: Lennart Kleinfeldt

Microbial fuel cells are a highly innovative technology, which allows the direct energetic utilization of the organic matter in municipal waste water. Electrochemically active bacteria, which are expressing electrons as a product of their metabolism, transform the energy-consuming water purification process into an energy-generating one. Additional application is the specific microbial electrosynthesis for the biotechnological production of molecules.
A scientist group with members from TU Braunschweig, Leibniz University Hannover and TU Clausthal has been created to further investigate and develop different aspects of microbial electrochemical systems.
In current systems the microorganisms are cultivated as biofilms on electrodes with varying three-dimensional structure. In this partial project of the scientist group, particulate electrode materials will be developed and characterized to investigate their suitability for the application in different bioelectrochemical systems. Redox-active metal oxide nanoparticles are synthesized in a non-aqueous sol-gel process. Subsequently, spray drying or fluidized bed agglomeration are used to obtain hierarchically structured aggregates. The surface of the as-prepared aggregates then has to be coated with carbon in order to ensure the electric conductivity as well as the biocompatibility of the aggregate structure. Finally, the product will be utilized in a fluidized bed reactor, which will be developed in cooperation with another subproject of the scientist group.

Nano_Elektrobak_Partikelschema Probe 6

Figure left: Schematic display of a carbon-coated particle aggregate with partially attached microorganisms.

Figure right: Electron micrograph of a spray-dried agglomerate

Team Members

Current Projects
Synthesis, self-assembly and printing of hard-magnetic nanoparticles more

Quanomet, Junior Research Group “Nanofluidics & Particle Manipulation” more

Processing of conjugated nanoparticle hybrid systems for use in biomedical diagnostics more

Fractionation of Nanoparticles by Preparative Gel Electrophoresis subproject of the SPP 2045 more

Advanced lithium-sulfur battery concepts for aviation (aero-LiS-SE) more

Principles of nanoscale matrix additives for fibre composite more

Nanoscale drug carrier systems as therapeutics for targeted tumor therapy more

Small Angle X-ray Scattering as Metrological Instrument – A Correlation Study on the Optical Properties of Semiconductor Nanoparticles as ubiquitous Measure of Particle Size more

Fractionation of Nanoparticles by Preparative Gel Electrophoresis more

Thin nanoparticle films for cathode composites in all solid state batteries more

ElektroBak – Innovative Materials and Concepts for Microbial Electrochemical Systems more

Characteristics of a nanoparticulate coating based on the process chain more

Finished Projects
Synthesis and processing of tailored AZO nanocrystals more

Preparation of multifunctional nanocomposite thin films made of nanosized building blocks more

Process technology of the synthesis of metal oxide nanoparticles by nonaqueous sol gel methods more

Biocompatible iron-oxide nanoparticles for the in-situ magnetic separation of bioproducts more

Small-Molecule Stabilization of ITO Nanoparticles more

AiF – CleanCoat: Development of transparent, photocatalytically active coatings on polymer substrates with long-term stability more

Protein purification with functionalized magnetic nanoparticles more