▎ 摘　　要

NOVELTY - A nanocomposite comprises two-dimensional layers of a carbon material and two-dimensional layers of hexagonal boron nitride material, where the nanocomposite is thermally stable at 100-450 degrees C as measured by thermogravimetric analysis. The weight ratio of the carbon material to the hexagonal boron nitride material is (1:99)-(99:1). USE - Nanocomposite used for forming electrode for supercapacitor and lithium-sulfur battery (all claimed) used for electric vehicle and portable electronic device. ADVANTAGE - The nanocomposite is safe, and reliable, and has excellent stability even when operated at high temperature and pressure, and thermal resistance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) an electrode, which comprises the nanocomposite; (2) a supercapacitor, which comprises an anode, a cathode, an electrolyte, and a separator between the electrodes, where the cathode includes the nanocomposite; (3) a lithium-sulfur battery; and (4) preparation of the nanocomposite, which involves ball-milling a mixture including a two-dimensional carbon material and a two-dimensional boron nitride, and calcining the mixture. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart of manufacture of nanocomposite. Preparing two-dimensional carbon material (110) Preparing two-dimensional sulfur material (150) Combining two-dimensional carbon material and sulfur (170)