Das Projekt "ONEBAT - Battery Replacement using Miniaturized Solid Oxide Fuel Cell" wird vom Umweltbundesamt gefördert und von Eidgenössische Technische Hochschule Zürich, Department of Materials, HCI E415, Cells and BioMaterials durchgeführt. The idea behind the project proposal is the vision of a micro-SOFC system which can be used as battery replacement for small portable electronic equipment. A factor of two to four higher energy density, geographical independence and immediate charging are expected from a micro-SOFC system compared to state-of-the-art Li-ion batteries. Polymer based fuel cells are not expected to show similar performance improvements over state-of-the-art batteries. Fundamental basic research on single topics is required in order to pave the way for such a new application. The central question is: Can an electrochemical device such as a micro- SOFC be operated at temperatures as low as 300-550 C when fueled with liquid gas and air? Fundamental aspects have to be studied in the fields of catalysis, micro-nanofabrication, chemical engineering, thermodynamics, MEMS packaging combined with those from materials science with features in the nanometer size range, i.e. - materials fabrication; specifically those techniques which allow to generate metal oxide thin films, that allow the microstructuring of thin films by photo lithography techniques, structuring of substrates (Si- single crystals as well as photosensitive glasses), bonding of substrates and the electrical conductivities of MeO films with nano-sized grained structures - materials characterization, in specific microstructural, structural, thermal, electrical, electrochemical, catalytic, mechanical characterization - designing of components and interfaces, such as SOFC membranes and arrays, gas processing, thermal system, support components, entire system The overall structure of the project is based on the structure of a potential electrochemical system in order to make sure to consider all important aspects and interfaces. The following five workpackages are defined: - WP1: Micro- SOFC thin films and membranes / WP2: Micro-fabricated gas processing unit / WP3: Thermo-mechanical simulations / WP4: Packaging and system integration / WP5: Alternative packaging approach by LTCC Seven Swiss groups from 5 Swiss institutions, i.e. ETHZ, EPFL, CSEM, ZHAW, and NTB, are involved in order to bring in all the different disciplines and experimental skills and tools required for the investigation of this complex and multi-disciplinary research.