公开(公告)号：US09847555B2

公开(公告)日：2017-12-19

申请号：US15477670

申请日：2017-04-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Toru Itakura ,  Kyosuke Ito ,  Jun Ishikawa ,  Rie Yokoi

IPC: H01M10/0569 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/58 ,  H01G11/06 ,  H01G11/62 ,  H01M2/16 ,  H01M4/133 ,  H01M4/136 ,  H01M4/66 ,  H01M10/0568 ,  H01M10/0585 ,  H01G11/32 ,  H01G11/50 ,  H01G11/60 ,  H01G11/84 ,  H01M4/62 ,  H01M4/04 ,  H01M4/1397 ,  H01M4/02

CPC classification number: H01M10/0569 ,  H01G11/06 ,  H01G11/32 ,  H01G11/50 ,  H01G11/60 ,  H01G11/62 ,  H01G11/84 ,  H01M2/162 ,  H01M2/1653 ,  H01M4/0404 ,  H01M4/043 ,  H01M4/0471 ,  H01M4/133 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/5825 ,  H01M4/587 ,  H01M4/621 ,  H01M4/623 ,  H01M4/625 ,  H01M4/661 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0585 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2220/30 ,  H01M2300/0034 ,  H01M2300/0045 ,  Y02E60/122 ,  Y02E60/13 ,  Y02T10/7011 ,  Y02T10/7022

Abstract: A power storage device with reduced initial irreversible capacity is provided. The power storage device includes a positive electrode including a positive electrode current collector and a positive electrode active material layer, a negative electrode including a negative electrode current collector and a negative electrode active material layer, and an electrolyte solution. In the negative electrode active material layer, the content percentage of a carbon material with an R value of 1.1 or more is less than 2 wt %. The R value refers to a ratio of a peak intensity I1360 to a peak intensity I1580 (I1360/I1580). The peak intensity I1360 and the peak intensity I1580 are observed by Raman spectrometry at a Raman shift of 1360 cm−1 and a Raman shift of 1580 cm−1, respectively. The electrolyte solution contains a lithium ion and an ionic liquid composed of an organic cation and an anion.

公开(公告)号：US09577290B2

公开(公告)日：2017-02-21

申请号：US13719562

申请日：2012-12-19

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kyosuke Ito ,  Toru Itakura ,  Nobuhiro Inoue ,  Jun Ishikawa ,  Junpei Momo

IPC: H01M10/0566 ,  H01M10/0569 ,  H01M10/052

CPC classification number: H01M10/0569 ,  H01M10/052 ,  H01M2300/0045 ,  Y02E60/122 ,  Y02T10/7011

Abstract: A power storage device using an organic solvent as a nonaqueous solvent for a nonaqueous electrolyte, in which a CV charging period in CCCV charging can be prevented from being extended and which has high performance, can be provided. The power storage device includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The nonaqueous electrolyte includes an ionic liquid including an alicyclic quaternary ammonium cation having one or more substituents and a counter anion to the alicyclic quaternary ammonium cation, a cyclic ester, and an alkali metal salt. In particular, in the power storage device, the ionic liquid content is greater than or equal to 70 wt % and less than 100 wt % per unit weight of the ionic liquid and the cyclic ester in the nonaqueous electrolyte, or greater than or equal to 50 wt % and less than 80 wt % per unit weight of the nonaqueous electrolyte.

Abstract translation: 可以提供使用有机溶剂作为非水电解质的非水溶剂的蓄电装置，其中可以防止CCCV充电中的CV充电期延长并且具有高性能。 蓄电装置包括正极，负极和非水电解质。 非水电解质包括离子液体，其包含具有一个或多个取代基的脂环族季铵阳离子和与脂环族季铵阳离子的抗衡阴离子，环状酯和碱金属盐。 特别地，在蓄电装置中，离子液体含量大于或等于70重量％且小于100重量％，每单位重量的离子液体和非水电解质中的环状酯，或大于或等于 50重量％且小于80重量％的每单位重量的非水电解质。

公开(公告)号：US20130164609A1

公开(公告)日：2013-06-27

申请号：US13719562

申请日：2012-12-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kyosuke ITO ,  Toru Itakura ,  Nobuhiro Inoue ,  Jun Ishikawa ,  Junpei Momo

IPC: H01M10/0569 ,  H01M10/052

CPC classification number: H01M10/0569 ,  H01M10/052 ,  H01M2300/0045 ,  Y02E60/122 ,  Y02T10/7011

Abstract: A power storage device using an organic solvent as a nonaqueous solvent for a nonaqueous electrolyte, in which a CV charging period in CCCV charging can be prevented from being extended and which has high performance, can be provided. The power storage device includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The nonaqueous electrolyte includes an ionic liquid including an alicyclic quaternary ammonium cation having one or more substituents and a counter anion to the alicyclic quaternary ammonium cation, a cyclic ester, and an alkali metal salt. In particular, in the power storage device, the ionic liquid content is greater than or equal to 70 wt % and less than 100 wt % per unit weight of the ionic liquid and the cyclic ester in the nonaqueous electrolyte, or greater than or equal to 50 wt % and less than 80 wt % per unit weight of the nonaqueous electrolyte.

Abstract translation: 可以提供使用有机溶剂作为非水电解质的非水溶剂的蓄电装置，其中可以防止CCCV充电中的CV充电期延长并且具有高性能。 蓄电装置包括正极，负极和非水电解质。 非水电解质包括离子液体，其包含具有一个或多个取代基的脂环族季铵阳离子和与脂环族季铵阳离子的抗衡阴离子，环状酯和碱金属盐。 特别地，在蓄电装置中，离子液体含量大于或等于70重量％且小于100重量％，每单位重量的离子液体和非水电解质中的环状酯，或大于或等于 50重量％且小于80重量％的每单位重量的非水电解质。