▎ 摘　　要

NOVELTY - Synthesizing filled carbon nanotubes (CNTs) comprises providing a carbon-based substrate in a reaction chamber, disposing a catalyst comprising a metal on the carbon-based substrate, and providing a sulfur-containing organic compound to the reaction chamber. A chemical vapor deposition technique is performed to simultaneously grow CNTs and fill the CNTs with a metal sulfide comprising the metal. The filled CNTs are synthesized with the metal sulfide, where the carbon-based substrate is carbon cloth, graphene, graphite, graphene oxide, carbon block, carbon fiber threads, carbon nanotube films, a carbon-coated substrate, a graphite-coated substrate, or a carbon nanotube film-coated substrate. USE - Method for synthesizing filled carbon nanotubes (CNTs). ADVANTAGE - The method synthesizes the filled carbon nanotubes (CNTs) in a simple manner with excellent results and improved capacity of lithium-ion batteries and is reliable and efficient at producing metal sulfide-filled CNTs with closed ends. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for synthesizing filled carbon nanotubes, which involves providing a carbon-based substrate in a reaction chamber, disposing a catalyst comprising a metal on the carbon-based substrate, providing a sulfur-containing organic compound to the reaction chamber, performing a chemical vapor deposition technique to simultaneously grow CNTs and fill the CNTs with a metal sulfide comprising the metal, providing a supply of the sulfur-containing organic compound outside the reaction chamber, and sending gas through the supply of the sulfur-containing organic compound. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the in situ synthesis of filled CNTs using a chemical vapor deposition technique. Quartz tube (1) Furnace (2) Quartz boat (3) Gas stoppers (4, 5) Outlet (6) Gas pipe (7)