Sicona Battery Technologies hits 600 Wh/kg with graphene-silicon anode pilot
Sicona Battery Technologies validated 600 Wh/kg energy density in graphene-wrapped silicon anode pouch cells at its Wollongong pilot line, achieving 1,200-cycle retention above 80 percent capacity with a 200 MWh/year scale-up targeted for late 2027. The result advances graphene's role as a structural buffer for silicon anodes, a combination the carbon materials and battery sectors have pursued to overcome silicon's volumetric expansion problem at commercial scale.
Sicona Battery Technologies has achieved a pilot-scale validation of 600 Wh/kg energy density using a graphene-wrapped silicon anode platform. This development is a key step towards potential tier-1 automotive supply agreements anticipated in 2027. The pilot line in Wollongong successfully produced 21 Ah pouch cells with a cycle life retention of over 80 percent capacity after 1,200 cycles. The graphene shell serves as a conductive buffer to accommodate silicon's volumetric expansion, addressing a long-standing reliability issue for high-silicon anodes. According to Sicona's Chief Technology Officer, Christiaan Jordaan, this advancement is due to the company's proprietary graphene functionalization process, developed in collaboration with the University of Wollongong. Independent test data is expected to be released in the second quarter of the year. Sicona has secured 54 million USD in committed funding from Series C investors, including Brigade Capital and the Australian Renewable Energy Agency. The company plans to scale production to 200 MWh per annum by late 2027, with advanced offtake discussions underway with two Korean and one German cell manufacturer.
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