公开(公告)号：US20200152961A1

公开(公告)日：2020-05-14

申请号：US16609621

申请日：2018-04-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yohei MOMMA ,  Mayumi MIKAMI ,  Aya UCHIDA ,  Kazuhito MACHIKAWA

IPC: H01M4/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/583 ,  H01M4/505 ,  H01M4/485

Abstract: To provide a positive electrode active material with which the cycle performance of a secondary battery can be improved and a manufacturing method thereof. When a secondary battery is fabricated using, for a positive electrode, a positive electrode active material obtained by depositing a solid electrolyte on a lithium compound with the use of a graphene compound by spray-drying treatment and volatilizing carbon from the graphene compound by heat treatment, the decomposition of an electrolyte solution in contact with the positive electrode active material can be inhibited, contributing to improvement in the cycle performance of the secondary battery.

公开(公告)号：US20150207148A1

公开(公告)日：2015-07-23

申请号：US14598344

申请日：2015-01-16

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kai KIMURA ,  Kazutaka KURIKI ,  Teppei OGUNI ,  Aya UCHIDA

IPC: H01M4/62 ,  H01G11/58 ,  H01G11/42 ,  H01M4/583 ,  H01G11/28

CPC classification number: H01M4/622 ,  H01G11/24 ,  H01G11/26 ,  H01G11/28 ,  H01G11/38 ,  H01M4/13 ,  H01M4/133 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0566 ,  H01M10/446 ,  H01M2004/021 ,  H01M2010/4292 ,  H01M2220/20 ,  H01M2220/30 ,  Y02E60/122 ,  Y02E60/13 ,  Y02T10/7011 ,  Y02T10/7022

Abstract: A power storage device with high capacity or high energy density is provided. A highly reliable power storage device is provided. A long-life power storage device is provided. An electrode includes an active material, a first binder, and a second binder. The specific surface area of the active material is S [m2/g]. The weight of the active material, the weight of the first binder, and the weight of the second binder are a, b, and c, respectively. The solution of {(b+c)/(a+b+c)}×100÷S is 0.3 or more. The electrode includes a first film in contact with the active material. The first film preferably includes a region in contact with the active material. The first film preferably includes a region with a thickness of 2 nm or more and 20 nm or less. The first film contains a water-soluble polymer.

Abstract translation: 提供具有高容量或高能量密度的蓄电装置。 提供了高度可靠的蓄电装置。 提供了一种长寿命蓄电装置。 电极包括活性材料，第一粘合剂和第二粘合剂。 活性物质的比表面积为S [m2 / g]。 活性物质的重量，第一粘合剂的重量和第二粘合剂的重量分别为a，b和c。 {（b + c）/（a + b + c）}×100÷S的解为0.3以上。 电极包括与活性材料接触的第一膜。 第一膜优选包括与活性物质接触的区域。 第一膜优选包括厚度为2nm以上且20nm以下的区域。 第一层膜含有水溶性聚合物。