Abstract
Stable carbon nanotube (CNT) aerogels were produced by forming a three-dimensional assembly of CNTs in solution to create a stable gel using a chemical cross-linker, followed by a CO 2 supercritical drying. Thermal annealing of these aerogels in air can significantly improve their electrical and mechanical properties, and increase their surface area and porosity by re-opening the originally blocked micropores and small mesopores in the as-prepared CNT aerogels. Thermally annealed CNT aerogels are mechanically stable and stiff, highly porous (∼99%), and exhibit excellent electrical conductivity (∼1–2 S/cm) and large specific surface area (∼590–680 m 2/g).
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