公开(公告)号：US09660264B2

公开(公告)日：2017-05-23

申请号：US14699440

申请日：2015-04-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tetsuya Asano ,  Tomoyuki Komori ,  Eiji Fujii

IPC: H01M4/525 ,  H01M4/131 ,  H01M4/66 ,  H01M10/052 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M4/66 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  Y02T10/7011

Abstract: A lithium secondary battery includes: a positive electrode including a positive-electrode active material layer; a negative electrode including a negative-electrode active material layer; and an ion conductor being lithium ion conductive and interposed between the positive electrode and the negative electrode. The positive-electrode active material layer is composed of lithium cobaltate, and has an α-NaFeO2 type crystal structure. The positive-electrode active material layer is composed only of first regions oriented in the (110) plane and second regions oriented in the (018) plane, the first regions and the second regions being mixedly present in the xy plane of the positive-electrode active material layer, where x and y axes are defined as two axes that are parallel to the principal face of the positive-electrode active material layer, and a z axis is defined as an axis perpendicular to the principal face.

公开(公告)号：US09799920B2

公开(公告)日：2017-10-24

申请号：US14700085

申请日：2015-04-29

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Tetsuya Asano ,  Tomoyuki Komori ,  Eiji Fujii

IPC: H01M10/0562 ,  H01M10/0525 ,  H01M4/525

CPC classification number: H01M10/0562 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0585 ,  H01M2004/028 ,  H01M2300/0071

Abstract: An exemplary lithium secondary battery includes: a positive electrode including a positive-electrode active substance layer 103; a negative electrode; and a solid electrolyte layer 104. The positive-electrode active substance layer 103 comprises lithium cobaltate, and has an α-NaFeO2 type crystal structure. The positive-electrode active substance layer 103 includes a lower layer 103a, and an upper layer 103b interposed between the lower layer and the solid electrolyte layer. The lower layer 103a is oriented in the (110) plane. The upper layer 103b is composed only of first regions 103b1 oriented in the (110) plane and second regions 103b2 oriented in the (018) plane, the first and second regions being mixedly present in the xy plane of the positive-electrode active substance layer. The solid electrolyte layer 104 comprises lithium lanthanum titanate, and has a tetragonal perovskite-type crystal structure. The solid electrolyte layer 104 is oriented in the (110) or (102) plane.

公开(公告)号：US09780407B2

公开(公告)日：2017-10-03

申请号：US14699711

申请日：2015-04-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tetsuya Asano ,  Tomoyuki Komori ,  Eiji Fujii

IPC: H01M10/0562 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/02 ,  H01M10/052

CPC classification number: H01M10/0562 ,  H01M4/131 ,  H01M4/525 ,  H01M4/66 ,  H01M4/664 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0585 ,  H01M2004/028 ,  H01M2300/0071 ,  Y02T10/7011

Abstract: An exemplary all-solid lithium secondary battery includes a positive electrode including a positive-electrode active substance layer, a negative electrode, and a solid electrolyte layer interposed between the positive electrode and the negative electrode. The positive-electrode active substance layer is composed of lithium cobaltate, and has an α-NaFeO2 type crystal structure. The positive-electrode active substance layer has a (018) plane oriented in a normal direction of a principal face of the positive-electrode active substance layer. The solid electrolyte layer is composed of lithium lanthanum titanate and has a tetragonal perovskite-type crystal structure. The solid electrolyte layer has a (110) plane or a (102) plane oriented in a normal direction of a principal face of the solid electrolyte layer.