▎ 摘　　要

NOVELTY - Compound, e.g. filled carbon nanotube comprises carbon-based substrate, carbon nanotube (CNT) arranged on the carbon-based substrate, and nanowire of a metal sulfide filled in carbon nanotube. The CNT filled with the nanowire being straight from a first end that to a second end that, and each of the first end and the second end of the CNT filled with the nanowire being closed with respective carbon shell. USE - Compound, e.g. filled carbon nanotube for use in battery, such as lithium-ion battery or sodium-ion battery (claimed). ADVANTAGE - The compound, e.g. filled carbon nanotube has great potential to develop high-performance sodium-ion battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a battery, which comprises: a cathode comprising lithium or sodium, an anode, and an electrolyte in contact with at least one of the cathode and the anode, where the battery is a lithium-ion battery or a sodium-ion battery, and the anode comprises the compound.