ELECTRODE MATERIAL CONTAINING MIXTURE OF POLYVINYL ALCOHOL OF HIGH DEGREE OF POLYMERIZATION AND POLYVINYL PYRROLIDONE AS BINDER AND LITHIUM SECONDARY BATTERY EMPLOYED WITH THE SAME

摘要

An electrode mix comprising a mixture of a polyvinyl alcohol with polyvinyl pyrrolidone as a binder and a lithium secondary battery comprising the same are disclosed. The electrode mix and lithium secondary battery according to the present invention enable stable maintenance of adhesion between active materials and/or adhesion between the active material and current collector and reduction of volumetric changes of anode active materials during repeated charge/discharge cycles, through the use of a polymer having an improved elongation percentage while exhibiting very high adhesive strength, as a binder of an electrode mix. Therefore, the present invention enables production of a large-capacity lithium secondary battery particularly using a silicon- or tin-based anode active material.