发明名称 |
Negative electrode for power storage device, method for forming the same, and power storage device |
摘要 |
An object is to suppress electrochemical decomposition of an electrolyte solution and the like at a negative electrode in a lithium ion battery or a lithium ion capacitor; thus, irreversible capacity is reduced, cycle performance is improved, or operating temperature range is extended. A negative electrode for a power storage device including a negative electrode current collector, a negative electrode active material layer which is over the negative electrode current collector and includes a plurality of particles of a negative electrode active material, and a film covering part of the negative electrode active material. The film has an insulating property and lithium ion conductivity. |
申请公布号 |
US9384904(B2) |
申请公布日期 |
2016.07.05 |
申请号 |
US201313792598 |
申请日期 |
2013.03.11 |
申请人 |
Semiconductor Energy Laboratory Co., LTD. |
发明人 |
Inoue Nobuhiro;Kataniwa Sachiko;Kuriki Kazutaka;Momo Junpei |
分类号 |
H01M4/02;H01G11/28;H01M4/62;H01G11/50 |
主分类号 |
H01M4/02 |
代理机构 |
Nixon Peabody LLP |
代理人 |
Nixon Peabody LLP ;Costellia Jeffrey L. |
主权项 |
1. A battery comprising:
a plurality of laminated bodies enveloped in an exterior body, each of the plurality of laminated bodies comprising a sheet-shaped positive electrode and a sheet-shaped negative electrode with a sheet-shaped separator interposed therebetween, wherein at least one of the sheet-shaped negative electrodes comprises:
a current collector; andan active material layer including a graphite particle and acetylene black, wherein the graphite particle is partly covered by an insulating film having a conductivity of a carrier ion, wherein the graphite particle has concavo-convex shape, wherein a concave portion of the graphite particle is covered by the insulating film, and wherein the current collectors of the sheet-shaped negative electrodes each have a tab region extending outside from the exterior body. |
地址 |
Kanagawa-ken JP |