POSITIVE ELECTRODE FOR SECONDARY BATTERY, AND SECONDARY BATTERY

摘要

A positive electrode for a secondary battery wherein the electrode includes a collector and a positive electrode active material layer which is stacked upon the collector, and which includes a positive electrode active material, a conductive agent, and a binder; the binder includes a first polymer and a second polymer; the first polymer is a fluorine-containing polymer; the second polymer includes a polymerized moiety having a nitrile group, a polymerized moiety having a hydrophilic group, a polymerized (meth)acrylic acid ester moiety, and a straight-chain polymerized alkylene moiety having a carbon number of at least 4; the proportion of the first polymer and the second polymer in the binder, expressed as a mass ratio, is in the range of 95:5 to 5:95.

主权项

1. A positive electrode for a secondary battery comprising a current collector, and a positive electrode active material layer stacked on said current collector and having a positive electrode active material, a conductive agent and a binder;wherein
said binder includes a first polymer and a second polymer, said first polymer is fluorine containing polymer, said second polymer includes a polymer unit having a nitrile group, a polymer unit having a hydrophilic group, (meth)acrylate polymer unit, and a polymer unit of linear alkylene having carbon atoms of 4 or more, and a ratio between said first polymer and said second polymer in said binder is 95:5 to 5:95 in terms of weight ratio.