gelonhui September 25 | sunstone development (603612.SH) investor relations activity record shows that in order to further improve the efficiency of using the waste heat of petroleum coke calcination in the prebaked anode production process, the company is cooperating with peking University of Chemical Technology to develop iron-based liquid flow battery long-term energy storage technology with low cost potential and high safety. In the first half of 2024, the electrolyte material system of this technological route has been developed, the electrode reaction interface has been designed, the short stack has been verified, and the 5kW-level stack has been assembled and put into testing.