Method for Preparing a Highly Defective Carbon Nanotube Current Collector Derived from Waste Polymer for an Anode of an Aluminum Secondary Battery

Waste-Polymer-Derived CNT Current Collector Manufacturing Technology for Aluminum Batteries

This technology relates to a method for manufacturing a highly defective carbon nanotube current collector for aluminum secondary battery anodes by using waste polypropylene masks as a carbon source.

Conventional aluminum secondary batteries have had difficulty achieving uniform metal growth and long-life operation because oxide-layer formation and reduced ion transport occur in the electrolyte environment. This technology uses pyrolysis gas from waste polymers and a Ni-based chemical vapor deposition process to form a three-dimensional defective CNT current collector, thereby promoting adsorption and reduction of aluminum ions.

As a result, it can realize uniform metal growth across the anode active area and high coulombic efficiency, thereby improving cycle life and driving stability of aluminum secondary batteries.

Key Features:

• It uses pyrolysis gas from waste polypropylene masks as a carbon source for CNT growth.
• It forms a three-dimensional highly defective carbon nanotube current collector through Ni-based chemical vapor deposition.
• It supports uniform metal growth by inducing adsorption and reduction of solvated aluminum ions through surface defects.
• It is advantageous for reducing effective current density at the aluminum anode and securing long-cycle driving stability.