▎ 摘　　要

NOVELTY - Electrode material comprises a nanocomposite comprising 0.1-15 wt.% metal oxide, carbon, hexagonal boron nitride and sulfur. USE - The electrode material is used for preparing an electrode in a lithium-sulfur battery to power downhole equipment to measure conditions inside oil wells or during oil operations, oil discovery and recovery. ADVANTAGE - The electrode material has improved specific capacity, improved rate performance, improved sulfur utilization over cathode at room temperature and elevated temperature conditions, provides safety devices, increases efficiency of certain oil operation equipment, provides lightweight power sources with improved energy density, cycle life and structural stability relative to batteries employing conventional electrode materials, and is more cost-effective and safer option for preventing thermal runaway without relying on complex safety devices. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) (1) a lithium-sulfur battery comprising an anode, a cathode, a separator and an electrolyte, where the cathode comprises a nanocomposite; and (2) (2) a method for preparing an electrode, involving milling a metal precursor, carbon, and hexagonal boron nitride to make a precursor mixture, heating the precursor mixture to a predetermined temperature in the presence of oxygen to form a nanocomposite, mixing the nanocomposite with sulfur to create an electrode mixture and forming an electrode from the electrode mixture.