Patent ID: 8722230

Claim:
An electrode for a lithium battery comprising a mixture of an electrode active material and a binder, wherein the binder consists of a thermo-irreversible binder, and a polyurethane binder prepared from a water-soluble initiator and a polyurethane compound having at least one double bond, a urethane main chain, and at least one group capable of forming a cation or anion, the polyurethane compound being obtained by reacting a hydroxyl group-containing compound comprising at least one double bond, a diisocyanate compound, and a dispersant, wherein: the first hydroxyl group-containing compound comprising at least one double bond is selected from the group consisting of polybutadiene comprising hydroxyl groups at both ends, polyethyleneglycol acrylate comprising a hydroxyl group at one end, polyethyleneglycol methacrylate comprising a hydroxyl group at one end, and combinations thereof, and the diisocyanate compound is selected from the group consisting of methylenephenyldiisocyanate (MDI), polymeric methylenediphenyldiisocyanate (PMDI), tolylenediisocyanate (TDI), lysinediisocyanate (LDI), hydrogenated tolylenediisocyanate hexamethylenediisocyanate (HDI), xylenediisocyanate (XDI), hydrogenated xylenediisocyanate, naphthalenediisocyanate (NDI), biphenylenediisocyanate, 2,4,6-triisopropylphenyldiisocyanate diphenyletherdiisocyanate, tolidinediisocyanate (TODI), isophoronediisocyanate (IPDI), 4,4′-dicyclohexylmethanediisocyanate (HMDI), tetramethylxylenediisocyanate (TMXDI), 2,2,4-trimethylhexamethylenediisocyanate (TMHDI), 1,12-diisocyanatododecan (DDI), norbornanediisocyanate (NBDI), 2,4-bis-(8-isocynatooctyl)-1,3dioctylcyclobutane (OCDI), 2,2,4(2,4,4)-trimethylhexamethylenediisocyanate (TMDI), naphthalene-crosslinked polyphenyl polyisocyanate, and combinations thereof.