Efficient and inexpensive preparation of graphene laminated film with ultrahigh thermal conductivity. (January 2021)

• Record Type: Journal Article
• Authors: Wu, Tongshun; Xu, Youliang; Wang, Haoyu; Sun, Zhonghui; Zou, Luyi
• Is Part Of: Carbon. Volume 171(2021)
• Page Start: 639
• Page End: 645
• Publication Date: 2021-01
• Subjects: Thermal conductivity -- Graphene paper -- Low energy cost -- Macroscopic -- Pilot plant test; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2020.09.039
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: 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 W m −1 K −1 when the thickness of film is 65 μm. 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 × 100 m of graphene film each roll which was continuously and macroscopically assembled on our self-made equipment. Graphical abstract: Image 1