公开(公告)号：US20130164619A1

公开(公告)日：2013-06-27

申请号：US13724427

申请日：2012-12-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Masaki YAMAKAJI ,  Kuniharu NOMOTO

IPC: H01M4/62 ,  H01M4/134

CPC classification number: H01M4/625 ,  H01M4/0404 ,  H01M4/134 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/5825 ,  H01M4/622

Abstract: The positive electrode active material layer includes a plurality of particles of a positive electrode active material and a reaction mixture where reduced graphene oxide is bonded to a polymer having a functional group as a side chain. The reduced graphene oxide has a sheet-like shape and high conductivity and thus functions as a conductive additive by being in contact with the plurality of particles of the positive electrode active material. The reaction mixture serves as an excellent binder since the reduced graphene oxide is bonded to the polymer. Therefore, even a small amount of the reaction mixture where the reduced graphene oxide is covalently bonded to the polymer excellently serves as a conductive additive and a binder.

Abstract translation: 正极活性物质层包含多个正极活性物质的粒子和氧化还原性氧化物与作为侧链的官能团的聚合物结合的反应混合物。 还原型石墨烯氧化物具有片状形状和高导电性，因此通过与正极活性物质的多个颗粒接触而用作导电添加剂。 反应混合物用作优异的粘合剂，因为还原的氧化石墨烯结合到聚合物上。 因此，即使少量的还原型石墨烯氧化物与聚合物共价键合的反应混合物也极好地用作导电添加剂和粘合剂。