▎ 摘　　要

NOVELTY - Composite nanofibers comprise porous nanofiber matrix and metal-organic framework (MOF)-derived structures distributed on the surface of the matrix. The structure comprises nano-sphere, hollow metal oxide, and carbon layer coated on the metal oxide. The carbon layer is an N-doped graphite carbon layer. The porous nanofiber matrix contains reduced graphene oxide. The metal oxide is a transition metal oxide. The MOF nanocrystal includes ZIF-8, ZIF-67, ZIF-8, MIL-100 and/or MOF-5. USE - The composite nanofibers are useful in anode material for lithium-ion battery. ADVANTAGE - The composite nanofiber has stable structure, large specific surface area, excellent electrical conductivity, excellent lithium storage properties including excellent speed performance and cycling stability due to unique nanostructure, relieves volume expansion in charging/discharging process, and allows liquid electrolyte to efficiently penetrate into electrode. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for manufacturing composite nanofibers.