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"The team's research yielded a novel solution that combines the strengths of batteries and supercapacitors while also negating the scalability problem. The "electrochemical flow capacitor" (EFC) consists of an electrochemical cell connected to two external electrolyte reservoirs - a design similar to existing redox flow batteries which are used in electrical vehicles. This technology is unique because it uses small carbon particles suspended in the electrolyte liquid to create a slurry of particles that can carry an electric charge."

Deeya Energy, which makes large flow batteries to provide backup power to industrial plants, raised $15 million in a second round of financing, according to Venture Wire. The company earlier raised $7.5 million and is building manufacturing facilities in India. What is a flow battery? It's a battery with tanks of electrolytes that effectively let the battery store more energy than normal batteries. The electrolytes flow or circulate through the system. The larger the tanks, the more electricity it can store.