| 초록 |
We present a rapid solvent evaporation method based on the triple point of a processing solvent to prepare carbon nanotube (CNT) foam with a porous structure for thermoelectric (TE) power generators. The rapid solvent evaporation process allows the preparation of CNT foam with various sizes and shapes. The obtained highly porous CNT foam with porosity exceeding 90% exhibits a low thermal conductivity of 0.17 W m−1 K−1 with increased phonon scattering, which is 100 times lower than that of a CNT film with a densely packed network. Finally, optimized p- and n-doped CNT foams are used to fabricate a vertical and flexible TE power generator with a combination of series and parallel mixed circuits. The maximum output power and output power per weight of the TE generator reach 1.5 μW and 82 μW g−1, respectively, at a temperature difference of 13.9 K. |
