flowcellbattery
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Scientists make battery that runs on air and carbon dioxide
Researchers at Penn State University have potentially come up with yet another way we could create energy from all that nasty carbon dioxide we pump into the atmosphere. They've developed an inexpensive flow cell battery that uses mostly water solutions containing either dissolved CO2 or dissolved normal air -- the technical name for the dissolving process is called sparging, just FYI. Because the liquids contain different concentrations of CO2, they have different pH levels, and it's this imbalance that generates electricity.
