▎ 摘　　要

NOVELTY - Preparing a carbon nanomaterial (CNM) product involves heating an electrolyte media to obtain a molten electrolyte media, positioning the molten electrolyte media between an anode and a cathode of an electrolytic cell, and introducing a source of carbon into the electrolytic cell. An iron-free additive is introduced into the electrolyte media or the molten electrolyte media, and applied electrical current to the cathode and the anode in the electrolytic cell. The CNM product is collected from the cathode, where the CNM product comprising a minimum relative-amount of a desired allotrope selected from a group of a thin carbon nanotube (CNT), a nano-bamboo, a nano-rod and a nano-flower. USE - Method for preparing carbon nanomaterial product for medical device, a structural enhancement additive, a strength enhancement additive, an electrical conductivity enhancement additive, or a thermal conductivity enhancement additive (claimed). ADVANTAGE - The prepared CNM product may lead to unusual physical chemical properties with implications useful to applications, such as those utilizing the high strength, high thermal, magnetic, electronic, piezoelectric, tribological characteristics of graphene-based materials, but which distribute these properties differently throughout the unusual geometries of these novel allotropes. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: 1. a carbon nanomaterial comprises a nano-rod, where the nano-rod has a squat, ring-like shape; and 2. use of a desired nano-carbon allotrope in one or more of a medical device, a structural enhancement additive, a strength enhancement additive, an electrical conductivity enhancement additive, a thermal conductivity enhancement additive, or a flexibility enhancement additive, a hardness enhancement additive, a durability enhancement additive, a lubrication enhancement additive, or as a catalyst, electric vehicles, cables or wires, athletic equipment, a pharmaceutical drug delivery system, an electronic, a battery, a super capacitor, or a sensor.