“…Compared with it, the second and most effective way is to prepare filled polymer composites by adding high thermal conductive fillers, such as alumina, boron nitride, carbon fiber, and silver particles, into the polymer matrix [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ]. During the past few decades, numerous efforts have been devoted to designing and fabricating polymers and polymer composites with high thermal conductivity [ 13 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 ]. At present, though many advances have been made in the field, there are still lots of research works and bottlenecks to be addressed for future industrial applications.…”