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New method to identify electroactive substances for organic redox-flow batteries
The EU-funded project SONAR (www.sonar-redox.eu), which is coordinated by the Fraunhofer Institute for Chemical Technology ICT in Pfinztal, Germany, aims to take the guesswork out of chemical screening, by using physics- and data-based modelling to identify promising electroactive substances.
The greatest challenge is to ensure viability on every level: a substance might have excellent individual properties, but complex interactions between the materials, the battery design, the mode of operation and also economic considerations can mean that it fails within a dynamic industrial system. SONAR will therefore integrate models on multiple length scales, from the atomistic scale up to the battery stack and system. In order to process the vast amount of data that results from computer simulation of materials and redox flow cells, the project will apply statistical methods, data analysis and machine-learning, and will compare the calculated results with experimental measurements at each stage.
The end result will be a unique, multi-scale screening service for organic redox-flow batteries, which for the first time will allow meaningful comparisons between competing organic RFB systems in terms of costs, lifetime and performance (so-called „levelized cost of storage“).
The project partners are notable experts for the modeling of electrochemical cells on all length scales. These include Fraunhofer ICT (the site of Europe’s largest redox-flow battery) and Fraunhofer SCAI, the Department of Energy Conversion and Storage at DTU, Denmark, the LCRS (Université de Picardie Jules Verne/CNRS) in France, the Zurich University of Applied Science in Swizerland, the German Karlsruhe Institute of Technology and the Australian University of New South Wales (inventor of today’s most commonly used vanadium RFB). The partners will work closely together with five associated industrial companies to speed up redox-flow battery development to meet the growing demands of the green energy sector. SONAR has received funding from the European Union's Horizon 2020 research and innovation program under Grant Agreement no. 875489. The project will run for four years, starting from 1st January 2020.
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