公开(公告)号：US09660251B2

公开(公告)日：2017-05-23

申请号：US14152911

申请日：2014-01-10

Applicant: GS Yuasa International Ltd.

Inventor： Takeshi Sasaki ,  Taro Yamafuku ,  Kazuki Kawaguchi ,  Masaki Masuda

IPC: H01M4/04 ,  H01M4/1397 ,  H01M4/66 ,  H01M4/136 ,  H01M4/36 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/02

CPC classification number: H01M4/0409 ,  H01M4/043 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/364 ,  H01M4/5825 ,  H01M4/623 ,  H01M4/625 ,  H01M4/663 ,  H01M4/667 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/021

Abstract: Provided is an electric storage device including: a first electrode plate; a second electrode plate having a polarity opposite to that of the first electrode plate; and a separator interposed between the first electrode plate and the second electrode plate, wherein the first electrode plate includes a current collector and a mixture layer laminated onto the current collector, the mixture layer contains at least one of the binder and the conductive additive, primary particles of an active material, and secondary particles each having a hollow region formed therein by aggregation of a plurality of the primary particles, and the at least one of the binder and the conductive additive is partially distributed in the hollow region.