On May 16 and 17, CIC energiGUNE brought together industrial players and materials and battery developers who have managed, within the framework of the European HIGREEW project, to take organic materials from the laboratory to a prototype already installed at Siemens Gamesa´s facilities in Zaragoza (Spain). The experts gathered in Vitoria-Gasteiz also analyzed the contribution of redox flow technology to the decarbonization of the economy, through the storage of renewable energy.

CIC energiGUNE, the Basque research center of reference in electrochemical energy storage, thermal energy storage and conversion and hydrogen technologies, held on May 16 and 17 in Vitoria-Gasteiz the second and last seminar of the European project HIGREEW, led by the Basque center and which, after three years of research, has demonstrated the technical feasibility of its proposal, supported by the manufacture and installation of a prototype of an organic redox flow battery. More than 70 participants from 10 different EU countries took part in this meeting, which also discussed the future of redox flow batteries.

"In the three years of project development, the HIGREEW consortium has managed to take the concept of organic active materials from the laboratory to the battery prototype and, therefore, we are one step closer to bringing the technology to the market," said Raquel Ferret, Business Development Director at CIC energiGUNE. In fact, the installation of the redox battery prototype was carried out last March at Siemens Gamesa´s headquarters in Zaragoza, with a view to its commissioning at the end of the HIGREEW project this May.

In this context, and under the title "Flow batteries, bringing technology closer to the market", the seminar showed use cases of redox batteries from the most relevant industrial players in the field of stationary energy storage, as well as from materials and battery developers. It also provided access to new market trends, together with a scientific view of the key components of batteries, and even outlined ideas, from a political point of view, on the new regulation of batteries.

In addition, the meeting served to define the way forward with respect to industry needs and trends, as well as on the potential contribution of redox flow technology to the decarbonization of the economy, thanks to its ability to facilitate renewable energy storage.

HIGREEW Project´s final meeting, hosted by CIC energiGUNE on May 16th & 17th.


Objectives of HIGREEW

The European HIGREEW project, led by CIC energiGUNE, aims to develop a new low-cost, water-based organic electrolyte to obtain more sustainable, competitive, affordable and higher-performance batteries to replace materials such as vanadium, the most widely used at present, which is toxic and difficult to obtain in Europe. In this sense, this type of redox flow batteries are postulated as a feasible alternative since, unlike vanadium batteries, they are based on abundant and easily accessible elements and, in addition, have a low environmental impact.

Milestones achieved during the project in the development of materials, such as new organic compounds that allow high voltage batteries 1.3-1.5V, and more selective membranes, which stand out for low cost processing, resulting in power increases of more than 10% and systems of greater durability and lower cost.

Thanks to the development of different generations of materials, it has been possible to integrate the first generations of these in a 5kW prototype, while work continues on the processing and scaling of the latest generations of materials. In terms of design, the creation of new cell and stack designs and, above all, the construction of a fully functional prototype based on an alternative chemistry, stand out. This prototype has a system control adapted to the new electrolytes that will allow an increase in the operating efficiency of the battery, as it is currently being tested in a real environment.

The HIGREEW consortium, led by CIC energiGUNE, is formed by 10 leading entities in materials, storage systems and renewable energies: Gamesa Electric, Universidad Autónoma de Madrid, Centre National de la Recherche Scientifique, C-Tech Innovation Ltd, University of West Bohemia New Technologies - Research Centre, Pinflow Energy Storage, Uniresearch, Siemens Gamesa Renewable Energy Innovation and Technology and Fraunhofer Institute for Chemical Technology.

As a further result of the project, CIC energiGUNE has started the development of a new generation of electrolytes based purely on organic materials, which will allow competing in performance with vanadium electrolyte (>1.25V) while decreasing electrolyte costs (<50€/kWh), which currently represents the main cost in these systems (>150€/kWh).

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