Abstract: In an anode material of a lithium-ion secondary battery and its preparation method, a natural graphite, an artificial graphite or both are mixed to form a graphite powder, and the graphite powder is mixed with a resin of a high hard carbon content and processed by a mist spray drying process, and finally added or coated with a special resin material after a carburizing heat treatment takes place to prepare a graphite composite of the anode material of the lithium-ion secondary battery and achieve a smaller surface area of an anode graphite composite of the battery and extended cycle life and capacity.

Abstract: In an anode material of a lithium-ion secondary battery and its preparation method, a natural graphite, an artificial graphite or both are mixed to form a graphite powder, and the graphite powder is mixed with a resin of a high hard carbon content and processed by a mist spray drying process, and finally added or coated with a special resin material after a carburizing heat treatment takes place to prepare a graphite composite of the anode material of the lithium-ion secondary battery and achieve a smaller surface area of an anode graphite composite of the battery and extended cycle life and capacity.

Abstract: Disclosed is a process for producing silicon carbide. The process includes the steps of (1) mixing .beta.-resin extracted from coal-tar pitch with .alpha.-resin and silica gel; (2) after being dried, grinding the mixture to powder; (3) heating the powder in an atmosphere of nitrogen with a temperature in the range from 300.degree. C. to 480.degree. C. until mesophase is cultured; and (4) proceeding the heat treatment with a higher temperature in the range from 900.degree. C. to 1200.degree. C. for a period in the range from 2 to 7 hours. By the process, the production of silicon carbide can be carried out at low temperatures so that it is cost-effective in energy consumption.