A close-up of a novel battery electrode made from chemically adorned carbon nanotubes from MIT. Shao-Horn and her colleagues built up the outer surfaces of the nanotubes with two different types of oxygen-containing chemical groups that gave them opposite charges. They then dipped their electrode starting materials alternatively in solutions containing the oppositely charged nanotubes, binding successive layers of tubes atop one another to build up the nanotube electrodes.

Image Credit: Seung Woo Lee et al., Massachusetts Institute of Technology.

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