发明名称 |
Binder composition for secondary battery positive electrode, slurry composition for secondary battery positive electrode, secondary battery positive electrode, and secondary battery |
摘要 |
Provided are a binder composition which has high electrolyte resistance characteristics, and a secondary battery which uses a positive electrode using the binder composition for high-temperature cycle characteristics. [Solution] The binder composition for the secondary battery positive electrode according to the present invention contains a polymerized unit which contains a nitrile group; a polymerized unit of (meth) acrylic acid ester; a polymerized unit which contains a hydrophilic group; and a polymerized unit of linear alkylene having a carbon number of at least four. In a mixed solvent in which a volume ratio EC:DEC between ethylene carbonate (EC) and diethyl carbonate (DEC) at 20° C. is 1:2, a degree of swelling with respect to an electrolyte in which LiPF6 is dissolved to have a concentration of 1.0 mol/L is between 100% and 500%. |
申请公布号 |
US9601775(B2) |
申请公布日期 |
2017.03.21 |
申请号 |
US201214360887 |
申请日期 |
2012.11.28 |
申请人 |
ZEON CORPORATION |
发明人 |
Fukumine Mayumi;Kobayashi Kei |
分类号 |
H01M4/62;H01M4/139;H01M4/04;H01M10/0525 |
主分类号 |
H01M4/62 |
代理机构 |
Birch, Stewart, Kolasch & Birch, LLP |
代理人 |
Birch, Stewart, Kolasch & Birch, LLP |
主权项 |
1. A binder composition for the secondary battery positive electrode comprising a binder including a polymer unit having nitrile group, (meth)acrylate polymer unit, a polymer unit having hydrophilic group, and a polymer unit of linear alkylene wherein the linear alkylene has carbon atoms of 4 or more; wherein,
a swelling degree of said binder in an electrolytic solution dissolved with LiPF6 of a concentration of 1.0 mol/L in a mixture solution formed by mixing ethylene carbonate (EC) and diethyl carbonate (DEC) having the volume ratio at 20° C. of EC:DEC=1:2 is 100 to 500%. |
地址 |
Tokyo JP |