Nitrogen-doped 3D graphene-carbon nanotube network for efficient lithium storage
A 3D nitrogen-doped graphene/multi-walled carbon nanotube(CS-GO-NCNT)crosslinked network mate-rial was successfully synthesized utilizing chitosan and melamine as carbon and nitrogen sources,concomitant with the incorporation of multi-wall carbon nanotubes and employing freeze drying technology.The material amalgamates the merits of 1D/2D hybrid carbon materials,wherein 1D carbon nanotubes confer robustness and expedited elec-tron transport pathways,while 2D graphene sheets facilitate rapid ion migration.Furthermore,the introduction of nitrogen heteroatoms serves to furnish additional active sites for lithium storage.When served as an anode material for lithium-ion batteries,the CS-GO-NCNT electrode delivered a reversible capacity surpassing 500 mAh·g-1,mark-edly outperforming commercial graphite anodes.Even after 300 cycles at a high current density of 1 A·g-1,it remained a reversible capacity of up to 268 mAh·g-1.
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