Projektbeschreibung
Löst neuer Salzschmelzen-Akkumulator das Speicherproblem der Erneuerbaren?
Das EU-finanzierte Projekt SOLSTICE plant die Entwicklung von zwei Natrium-Zink-Schmelzsalzbatterien, die bei hohen Temperaturen arbeiten und zur stationären Energiespeicherung eingesetzt werden könnten. Die erste Batterie wird auf der ZEBRA-Technologie beruhen, eines Typs des wiederaufladbaren Salzschmelzen-Akkumulators auf der Basis von Nickel, Natrium und Chlorid. Anstelle des Nickels wird das Forschungsteam kostengünstiges und reichlich vorhandenes Zink als positive Elektrode verwenden. Bei der zweiten, rein flüssigen Batterie kommen dieselben chemischen Bestandteile, jedoch kein keramischer Elektrolyt zum Einsatz, was die Batteriekosten weiter senkt. Ziel ist bei beiden Batteriekonzepten der Technologie-Reifegrad 5.
Ziel
SOLSTICE answers the quest for stationary energy storage with two Na-Zn molten salt batteries, which operate at elevated temperature. The first concept benefits from the existing and successful ZEBRA® technology. Replacing their Ni-electrode by cheap and abundant Zn will only minimally affect other system parts thereby ensuring fast commercialisation. The second approach, an all-liquid cell, will apply the same chemistry, but does not require a ceramic electrolyte thus reducing cost further. Both battery concepts shall be brought to TRL5, and validated by four demonstrators, operating in a realistic environment at the end of the 4-year project. The demonstrators will be equipped with a self-learning battery management system and will be accompanied by upscaling, system integration and public acceptance studies. Na-Zn technology is exceptionally performant as it promises similar efficiency and depth of discharge as Li-ion cells, but extreme current densities. Featuring molten electrodes, Na-Zn cells actually work better when being cycled, as operation keeps them warm; several cycles per day and a lifetime exceeding 10,000 cycles can be legitimately expected. Na-Zn storage is perfectly sustainable: the raw materials, table salt and Zn, are abundant in the EU, cheap and not harmful. The environmental impact of Zn-mining and battery production is expected to be minimal. Finally, recycling is greatly simplified due to the large, molten electrodes. The most valuable element, Zn, can simply be recovered as pure metal and reused after dismantling the cells. Based on the existing knowledge on ZEBRA® battery production, the storage price of Na-Zn batteries is expected to approach 1 cent/kWh/cycle by 2030 - including balance-of-plant and recycling cost. Summing up, the Na-Zn technology is the cheapest molten-salt battery, is fully sustainable, fulfils all criteria of the call - and is even realistic to be commercialised by 2030.
Wissenschaftliches Gebiet
Schlüsselbegriffe
Programm/Programme
Aufforderung zur Vorschlagseinreichung
Andere Projekte für diesen Aufruf anzeigenUnterauftrag
H2020-LC-BAT-2020
Finanzierungsplan
RIA - Research and Innovation actionKoordinator
01328 Dresden
Deutschland