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A brick wall can also be a battery. Thanks to the red pigment they contain, bricks can be turned into efficient energy storage devices.Associated journal article: Wang, H., Diao, Y., Lu, Y. et al. “Energy storing bricks for stationary PEDOT supercapacitors.” Nature Communications 11, 3882 (2020). https://doi.org/10.1038/s41467-020-17708-1