The thermal conductivity of dielectric polymers is expected to be improved by high thermal conductivity fillers to meet the demand for thermal management materials in high power electronics and integrated circuits. Though, graphene exhibits the remarkable thermal conductivity, its inherent electrical conductivity and the poor interfacial phonon coupling with the polymer matrix restrict its application as filler for the thermal conductive dielectric composites. Herein, we demonstrate fluorinated graphene (FG) as a dual-functional filler to overcome the graphene’s drawbacks of high electrical conductivity and poor interfacial compatibility, with its high thermal conductivity remaining. The results show that the interfacial thermal resistance between FG and matrix can be reduced through interfacial interaction. In addition, FG induces the in-plane orientation of poly(vinylidene fluoride) (PVDF) molecular chains to accelerate heat dissipation. The composite film with only 5 wt% FG content exhibits extremely high thermal conductivity (6.8 W·m^-1·K^-1), which is 30 times higher than the pristine PVDF film. This work provides new ideas for fabricating thermally conductive dielectric composites, paving the way for next-generation dielectric thermal management materials in 5G/6G microelectronics.

The perturbation in the magnetic field generated by the rotation or oscillation of magnetic domains in magnetic materials can emit low-frequency electromagnetic waves, which are expected to be used in low-frequency communications. However, the magnetic emission intensity, defined by the perturbation ability, of current commercially applied amorphous alloys, such as Metglas, cannot meet the application requirements for low-frequency antennas due to the domain motion energy loss. Herein, a multi-phase Metglas amorphous alloy was constructed by incorporating α-Fe nanocrystals using rapid annealing to manipulate the domain movement. It was found that 3.89 times higher magnetic emission intensity is obtained compared to the pristine due to the synergism of the deformation and displacement mechanisms. Moreover, the low-frequency magnetic emission performance verification was carried out by preparing magnetoelectric composites as the antenna vibrator by assembling the alloy and macro piezoelectric fiber composites (MFC). Enhancements of magnetic emission intensity are found at 93.3% and 49.2% at the first and second harmonic frequencies compared with the unmodified alloy vibrator. Therefore, the approach leads to the development of high-performance communication with a novel standard for evaluation.