Secondary battery electrode, and method for producing same
摘要
說明書
The carbon-based precursor may be converted (pyrolysis) into carbon by a heat treatment to improve electrical conductivity of the active material bulk, and if necessary, selectively, a graphitization heat treatment may be further performed to convert the carbon-based precursor into a negative electrode active material, of course. Pyrolysis may be performed in the conventionally known conditions considering specific materials of the carbon-based precursor, and a graphitizaton treatment may be also performed in the conventionally known conditions used in graphitization of carbon. As an example, pyrolysis may be performed at a temperature of 600 to 1500° C., and graphitization may be performed at a temperature of 2800° C. or higher, but is not limited thereto.
That is, the production method according to an exemplary embodiment may include molding a raw material including an active material and a carbon precursor or a raw material including an active material, a carbon precursor, and a conductive material to produce a molded body; and heat-treating the molded body to produce a sintered body. Here, during the heat treatment for sintering, pyrolysis of the carbon precursor may be performed simultaneously. If necessary, a step of heat-treating the sintered body for more complete pyrolysis to produce a secondary sintered body in which the carbon-based precursor is pyrolyzed into carbon, may be further performed. In addition, if necessary, in order to graphitize pyrocarbon, a step of heat-treating the sintered body or the secondary sintered body to produce a sintered body in which pyrocarbon is graphitized, may be further performed.
