The graphene layers are from a few layers to dozens of layers. Generally if the layers are too thin, then it will collapse.
3. Has this foam used for the synthesis of metal-graphene composites?
Yes, this foam has been used and can do metal-graphene composite preparation, but kindly note that many specific experiments may need their own assessment depending on the application.
Research Citations of ACS Material Products
Lin, Huan, et al. “Significantly reduced thermal diffusivity of free-Standing two-Layer graphene in graphene foam.” Nanotechnology, vol. 24, no. 41, 2013, p. 415706., doi:10.1088/0957-4484/24/41/415706.
Asfaw, Habtom D., et al. “Nanosized LiFePO4-Decorated emulsion-Templated carbon foam for 3D micro batteries: a study of structure and electrochemical performance.” Nanoscale, vol. 6, no. 15, 2014, pp. 8804–8813., doi:10.1039/c4nr01682c.
Leeuwner, M. J., et al. “Novel Graphene Foam Microporous Layers for PEM Fuel Cells: Interfacial Characteristics and Comparative Performance.” Fuel Cells, vol. 15, no. 6, Mar. 2015, pp. 790–801., doi:10.1002/fuce.201500031.
Nieto, Andy, et al. “Graphene reinforced metal and ceramic matrix composites: a review.” International Materials Reviews, vol. 62, no. 5, 27 Oct. 2016, doi:10.1080/09506608.2016.1219481.