公开(公告)号：US20130084495A1

公开(公告)日：2013-04-04

申请号：US13625111

申请日：2012-09-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Ryota TAJIMA ,  Kunio HOSOYA ,  Takeshi OSADA ,  Teppei OGUNI ,  Shunpei YAMAZAKI

IPC: H01M4/38 ,  H01M4/583 ,  H01M4/02 ,  H01M4/64 ,  B82Y30/00

CPC classification number: H01M4/134 ,  H01M2/1673 ,  H01M2/18 ,  H01M4/366 ,  H01M4/587 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/025 ,  H01M2004/027

Abstract: Provided is a power storage device in which charge/discharge capacity is high, charge/discharge can be performed at high speed, and deterioration in battery characteristics due to charge/discharge is small. The power storage device includes a negative electrode including an active material including a plurality of prism-like protrusions. A cross section of each of the plurality of prism-like protrusions, which is perpendicular to the axis of each protrusion, is a polygonal shape or a polygonal shape including a curve, such as a cross shape, an H shape, an L shape, an I shape, a T shape, a U shape, or a Z shape. The active material including the plurality of prism-like protrusions may be covered with graphene.

Abstract translation: 提供了充放电容量高的电力存储装置，能够高速进行充放电，充放电时的电池特性的劣化小。 蓄电装置包括负极，其包括包含多个棱柱状突起的活性物质。 多个棱柱状突起的垂直于每个突起的轴线的横截面是多边形或多边形，包括十字形，H形，L形等的曲线， I形，T形，U形或Z形。 包括多个棱柱状突起的活性材料可以被石墨烯覆盖。