Researchers in the U.S. have repurposed a commonplace chemical used in water treatment facilities to develop an all-liquid, iron-based redox flow battery for large-scale energy storage. Their lab-scale battery exhibited strong cycling stability over one thousand consecutive charging cycles, while maintaining 98.7% of its original capacity.
The US Department of Energy’s (DoE) Argonne National Laboratory and Idaho National Laboratory will carry out demonstration projects to validate long-duration energy storage tech developed by German manufacturer CMBlu Energy. The collaborative project is designed to improve microgrids in cold climates and make fast charging of electric vehicles more affordable in underserved communities.
Germany’s VoltStorage says its containerized 50 kWh vanadium redox flow battery solution can be scaled up to 500 kWh.
Researchers at the Pacific Northwest National Laboratory (PNNL) have demonstrated the use of sugar water to improve the performance of flow batteries for grid-scale energy storage.
Sumitomo says that its 2MW/8MWh vanadium redox flow battery achieved a 99% operating rate at San Diego Gas & Electric’s (SDG&E) facility in California. The battery is expected to retain a capacity rate of 90% or more for 20 years in the electricity market.
Redflow, an Australian redox-flow battery manufacturer, will build one of the world’s largest zinc-based battery energy storage systems in the United States, after signing a multi-million-dollar deal with the California Energy Commission.
UK researchers have assessed the cost of a 24V soluble lead flow battery optimized for PV applications. They have found that a total component cost of GBP 50 ($62)/kWh could be achieved, which is half that of current nickel-manganese-cobalt (NMC) lithium-ion cells.
Infinity Turbine has developed a new system that uses the electricity stored in a saltwater redox flow battery to produce clean drinking water from seawater. It said the technology can be used by cruise ships and cargo ships.
Researchers in China have successfully prepared cobalt oxide-modified graphite felt as an electrode material for an iron-chromium flow battery. The electrode performance significantly improved due to the effects of cobalt, which in turn boosted the energy efficiency and overall performance of the battery.
Singapore-based VFLowTech is manufacturing compact, scalable vanadium redox flow batteries with 24/7 operation over lifespans of 25 years. It is now setting up a 200 MWh production line, with plans to scale up the production of modular, long-duration storage solutions.
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