Electrical conductivity
and electrothermal performance of rC22@GO–CNT/GO composites.
(a) The resistivity of rC22@GO–CNT/GO composite varies with
the volume concentration of C22@GO–CNT. (b) As a function of
temperature, the resistivity curves of the 1st and 100th thermal cycles
change slightly, indicating the conductive structure is stable. (c)
Temperature evolution curves of r25-C22@GO–CNT/GO under constant
voltages of 2, 3, 4, 5, and 6 V. (d) As a function of voltage, the
balanced surface temperatures obtained at 20 min heating are demonstrated.
The samples of r5-C22@GO–CNT/GO, r25-C22@GO–CNT/GO,
50-C22@GO–CNT/GO, and neat rGO heater were studied. (e) A collection
of temperature evolution curves of r25-C22@GO–CNT/GO composite
and neat rGO heater under 6 V repeated for 100 cycles.