Аннотация
Abstract Graphene aerogels (GAs), fabricated from graphene oxide (GO) suspensions using a mild chemical reduction method, are promising for many applications. Here we report the thermal conductivities of \GAs\ having various graphene volume fractions from 0.67% to 2.5%, with and without annealing treatment, measured using a comparative infrared microscopy technique. The thermal conductivities of the \GAs\ are measured to be 0.12–0.36 W/(m K). This is the first systematical study of the thermal properties of \GAs\ and the results elucidate the factors limiting their thermal conductivities. The developed thermal measurement technique can be applied to other porous material systems.
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