METHODS FOR PREPARING HARD CARBON PRODUCTS BY SULFURIZATION AND OXIDATION PROCESSES

• Main Authors: Schmidt, Paul M, Marda, Jonathan R, Zhang, Liang, Huang, Kan, Shi, Dachuan, Wilbee, Alexander Z
• Format: Patent
• Language: English
• Published: 16.02.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; CRACKING HYDROCARBON OILS; ELECTRICITY; FUELS; INORGANIC CHEMISTRY; LUBRICANTS; METALLURGY; MINERAL WAXES; NON-METALLIC ELEMENTS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

Embodiments of the present disclosure generally relate to methods for preparing carbon materials which can be used in battery electrodes. More specifically, embodiments relate to methods for preparing hard carbon materials used as anode materials in metal-ion batteries, such as a sodium-ion battery. In one or more embodiments, a method includes exposing a liquid refinery hydrocarbon product to a first functionalization agent containing sulfur to produce a first solid functionalized product containing sulfur during a first functionalization process. The method further includes purifying the first solid functionalized product during a purification process and exposing the first solid functionalized product to a second functionalization agent containing oxygen to produce a second solid functionalized product containing sulfur and oxygen during a second functionalization process. The method also includes carbonizing the second solid functionalized product to produce a hard carbon product during a carbonization process.