Heat collection and supply of interconnected netlike graphene/polyethyleneglycol composites for thermoelectric devices

Abstract

The key challenges in thermoelectric power conversion are creating a significant temperature difference and obtaining more heat energy through a thermoelectric device. Herein, graphene/polyethyleneglycol composites (G-PEGs) were proposed as a heat supply for thermoelectric devices. The G-PEGs not only afford a lot of conductive pathways for heat transfer but also act as highly thermally conductive reservoirs to hold phase-change materials for thermal energy collection, storage and release. The concept described in this study holds great promise in designing multifunctional composites for heat collection, transport, and supply in thermoelectric power conversion.

Recent Progress of Two-Dimensional Thermoelectric Materials

“…According to their studies, a suppression of the thermal conductivity was observed due to the rough surface and the reduction of diameter of the sample. By using these microstructure measurement platforms, the thermoelectric properties of many individual nanowires, nanosheets, quantum dot superlattices, and thin films were investigated [227,231,233,234,236,[238][239][240][241][242][243][244][245]. Recently, the thermoelectric properties of single-layer and multilayer 2D materials have been studied via these microstructure measurement platforms.…”

Smart Utilization of Multifunctional Metal Oxides in Phase Change Materials

“…Wang et al 120 prepared graphene/paraffin composite PCMs for STEG, which can drive a little fan. Zhang et al 121 Review over 200 s. Further, Tang et al 122 and Yang et al 123,124 incorporated different PCMs into the STEG system to continuously increase the time of temperature difference stability, thus obtaining a stable output current over the long term.…”

Novel semi‐interpenetrating network structural phase change composites with high phase change enthalpy

“…Among the numerous methods for TES, the application of phase change materials (PCMs) has become a research hotspot because PCMs show high latent heat during phase transition . However, classical solid–liquid PCMs, such as fatty acid, fatty alcohol, fatty hydrocarbon, paraffin, and polyethylene glycol (PEG), are made disadvantageous by the issue of leakage. To solve the leakage problem, many studies have proposed various methods, including the microcapsule method, graft copolymerization, and polymerization .…”