Preparation of Pyrite Composite Nano-Graphite/Multilayer Graphene Electrothermal Functional Coatings and Study of Electrothermal Performance

Abstract

Metal sulfides possess extensive potential applications across biology, medicine, environmental science, and energy generation and utilization, attributed to their distinctive electrical, optical, and chemical properties. In this study, we selected iron disulfide (FeS2), the most widely distributed and abundant metal sulfide, as the focus of our research. Iron disulfide (FeS2) features an appropriate electronic band gap (0.95 eV), energy band position, large specific capacity, and low redox potential. We employed a pyrite (FeS2) composite with nano-graphite/multi-layer graphene to develop an electrically heated functional coating with highly efficient electro-thermal radiation conversion. The optimal admixture amount of pyrite at 7wt% results in an effective temperature of 70°C for the prepared electrothermal film, with an electrothermal conversion efficiency of 88.64%, during a 10-day continuous power supply test, the resistance variation was less than 2%. Simultaneously, this electric heating coating is cost-effective and holds significant potential for applications in smart home heating, intelligent electric heating clothing, and aircraft wing de-icing. In the future, this material will advance towards higher conversion efficiency and higher effective temperatures.

Keywords: pyrite, iron disulfide (FeS2), nano-graphite/multilayer graphene, electric heating film