Efficient and inexpensive preparation of graphene laminated film with ultrahigh thermal conductivity

With the rapid development of electronic technology, the demand for thermal management materials is increasing continuously. Recent years graphene paper is considered as a potential material to replace the traditional graphitized polyimide film. Although the current route to graphene paper can achieve a high thermal conductivity, the extremely high energy consumption in graphitization procedure and severe heavy metal contamination limit the application of graphene paper. Here we develop a high-efficiency, low-energy cost, and inexpensive technology to produce graphene paper in large quantities. Without graphitization, the thermal conductivity of this graphene laminated film can reach 975 Wm(-1) K-1 when the thickness of film is 65 mm. Based on this easy-operated technology, we have already completed the pilot plant test, attained capacity of 3 kg graphene per reactor in 8 h and 800 mm x 100 m of graphene film each roll which was continuously and macroscopically assembled on our self-made equipment. (C) 2020 Elsevier Ltd. All rights reserved.

Automated summary

With the rapid development of electronic technology, the demand for thermal management materials is increasing continuously. Graphene paper is considered as a potential material to replace the traditional graphitized polyimide film, but its application is limited due to high energy consumption and heavy metal contamination. A new technology has been developed to produce graphene paper efficiently and cost-effectively, achieving promising results.