Layer-by-layer covalent bond coupling way making graphdiyne cages

Three-dimensional Graphdiyne (GDY) cages have been prepared through a facile layer by layer in-situ carbon-carbon bond coupling strategy under mild conditions, which can inlaid with various nanomaterials (Si, SiO₂, Ag, MoS₂, etc) forming markisa-structured nanocomposites. For Si nanoparticles@GDY (Si NPs@GDY), the covalently linked 3D GDY cages inlaid with Si NPs, can effectively buffer the dramatic volume change of Si NPs. Meanwhile, the integrative GDY network can also serve as high-speed conductive channels so that all the Si NPs are electrochemically active. As a result, lithium-ion batteries based on Si NPs@GDY anode exhibit high specific capacity, superior rate capability and cycling performance. Furthermore, when getting rid of the wrapped nanomaterials, a 3D GDY matrix composed of interconnected GDY cages by robust covalent bond would received, which would have more applications in catalysis, adsorption, electron device, etc.