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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
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
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机译:含有高聚合度聚乙烯醇和聚乙烯吡咯烷酮作为粘结剂的混合物的电极材料以及使用该材料的锂二次电池
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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.
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