Halide Energy, previously known as CuRen, develops copper-based flow batteries for long-duration energy storage. The company says its technology is aimed at helping utilities, grid operators, and energy companies manage energy volatility and improve grid resiliency as power systems incorporate more renewable generation. Paul Wong is named as co-founder and CEO, and Sakari Syväniemi is identified by the company as one of its founders and a key technology driver. Halide Energy has highlighted recognition from Fortum’s Spark Innovation Challenge and the 2024 International Flow Battery Forum, but no fundraising details or headquarters location were clearly verified from the sources reviewed.