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发明授权
CN105378988B 锂二次电池的电极用粘合剂、电极及锂二次电池 有权

锂二次电池的电极用粘合剂、电极及锂二次电池
摘要：
本发明提供一种锂二次电池的电极用粘合剂、使用所述粘合剂所制造的电极、及使用所述电极的充放电特性优异的锂二次电池，锂二次电池的电极用粘合剂含有聚氨基甲酸酯的水分散体，该聚氨基甲酸酯的水分散体包含(A)聚异氰酸酯、(B)具有两个以上的活性氢基的化合物、(C)具有一个以上的活性氢基与亲水基的化合物及(D)链伸长剂，并且锂二次电池的电极用粘合剂对集电体的密接性高而在压制加工时不产生剥离，具有高柔软性，且粘合性及耐电解液性优异。本发明所用的电极用粘合剂含有聚氨基甲酸酯的水分散体，聚氨基甲酸酯的水分散体是(B)具有两个以上的活性氢基的化合物含有烯烃系多元醇和/或碳酸酯键链间的碳数小于6的聚碳酸酯二醇而成。
摘要（英）：

A binder for an electrode of a lithium secondary battery contains a water dispersion of a polyurethane. The polyurethane has been formed of (A) a polyisocyanate, (B) a compound having two or more active hydrogen groups, (C) a compound having one or more active hydrogen groups and a hydrophilic group, and (D) a chain extending agent. The (B) compound having two or more active hydrogen groups contains an olefinic polyol and/or a carbonate diol having a carbon number between carbonate bond chains of less than 6. The binder has high adhesiveness to a collector, does not cause release in press molding, has high flexibility, and is excellent in bindability and resistance to an electrolytic solution.

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