公开(公告)号：US08883348B2

公开(公告)日：2014-11-11

申请号：US11916603

申请日：2006-07-21

申请人： Hajime Nishino ,  Shuji Tsutsumi ,  Shinji Kasamatsu ,  Hideharu Takezawa ,  Mikinari Shimada

发明人： Hajime Nishino ,  Shuji Tsutsumi ,  Shinji Kasamatsu ,  Hideharu Takezawa ,  Mikinari Shimada

IPC分类号： H01M4/00 ,  H01M4/13 ,  H01M4/58 ,  H01M10/0525 ,  H01M4/70

CPC分类号： H01M4/70 ,  H01M10/0525 ,  Y02E60/122 ,  Y02T10/7011

摘要： An object of the present invention is to provide an electrode for a lithium ion secondary battery that can ensure a high level of safety even when exposed to severe conditions such as a nail penetration test or crush test, and exhibit excellent output characteristics.The present invention relates to an electrode for a lithium ion secondary battery having a material mixture containing active material particles capable of reversibly absorbing and desorbing lithium, and a current collector that carries the material mixture, wherein a surface of the current collector has recessed portions, and an area occupied by the recessed portions accounts for not less than 30% of an a material mixture carrying area of the current collector. The present invention further relates to an electrode for a lithium ion secondary battery wherein, in a cut surface obtained by simultaneously cutting a material mixture and a current collector vertically to an electrode plane, the maximum depth of recessed portions is not less than 1 μm, or a difference between an average thickness of a current collector and a maximum thickness of the current collector is not less than 0.35 μm.

摘要翻译： 本发明的目的是提供一种锂离子二次电池用电极，即使在暴露于诸如指甲穿透试验或粉碎试验等严酷条件下也能够确保高水平的安全性，并且显示出优异的输出特性。 本发明涉及一种锂离子二次电池用电极，其具有包含能够可逆地吸收和解吸锂的活性物质粒子的材料混合物，以及承载该材料混合物的集电体，其中集电体的表面具有凹部， 并且由凹部占据的面积占集电体的混合物承载面积的30％以上。 本发明还涉及一种锂离子二次电池用电极，其特征在于，在与电极平面垂直地同时切割材料混合物和集电体的切断面中，凹部的最大深度为1μm以上， 或者集电体的平均厚度与集电体的最大厚度的差为0.35μm以上。

公开(公告)号：US08568925B2

公开(公告)日：2013-10-29

申请号：US13502996

申请日：2011-05-12

申请人： Taisuke Yamamoto ,  Hideharu Takezawa

发明人： Taisuke Yamamoto ,  Hideharu Takezawa

IPC分类号： H01M4/485

CPC分类号： H01M10/0525 ,  H01M4/485 ,  H01M4/525 ,  H01M4/587 ,  H01M2004/021 ,  H01M2010/4292 ,  Y02T10/7011

摘要： A lithium secondary battery according to the present invention includes: a positive electrode having a positive-electrode active material capable of occluding and releasing lithium ions; a negative electrode having a negative-electrode active material capable of occluding and releasing lithium ions; a separator interposed between the positive electrode and the negative electrode; and an electrolyte having lithium-ion conductivity. The positive-electrode active material contains a nickel-type lithium-containing complex oxide. The negative-electrode active material contains a graphite-type material having a reversible capacity of 350 mAh/g or more and an irreversible capacity of 30 mAh/g or less. A ratio Qc/Qa between an irreversible capacity Qc per unit area in a portion of the positive electrode that opposes the negative electrode and an irreversible capacity Qa per unit area in a portion of the negative electrode that opposes the positive electrode is equal to or greater than 0.50 but less than 1. As a result, the charge-discharge cycle characteristics can be improved while ensuring a high capacity.

摘要翻译： 根据本发明的锂二次电池包括：具有能够吸留和释放锂离子的正极活性物质的正极; 具有能够吸留和释放锂离子的负极活性物质的负极; 夹在正极和负极之间的隔膜; 和具有锂离子传导性的电解质。 正极活性物质含有镍系锂系复合氧化物。 负极活性物质含有350mAh / g以上的可逆容量和30mAh / g以下的不可逆容量的石墨类材料。 与负极相对的正极的部分中的每单位面积的不可逆容量Qc与正极相对的负极部分中的每单位面积的不可逆容量Qa之比Qc / Qa等于或等于 大于0.50但小于1.结果，可以在确保高容量的同时提高充放电循环特性。

公开(公告)号：US08153292B2

公开(公告)日：2012-04-10

申请号：US12100774

申请日：2008-04-10

申请人： Hideharu Takezawa

发明人： Hideharu Takezawa

IPC分类号： H01M10/36

CPC分类号： H01M4/1395 ,  H01M4/139 ,  H01M4/1391 ,  H01M4/483 ,  H01M10/0562 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

摘要： According to a method for manufacturing an electrode of an electrochemical device, an electrode precursor capable of absorbing and releasing lithium is provided with lithium, and the resistance of the electrode precursor is measured after absorbing lithium. In addition, a processing apparatus for an electrode of an electrochemical device includes a lithium providing section for providing lithium to such an electrode precursor, and a first measurement section for measuring the resistance of the electrode precursor after absorbing lithium.

摘要翻译： 根据用于制造电化学装置的电极的方法，能够吸收和释放锂的电极前体被提供有锂，并且在吸收锂之后测量电极前体的电阻。 另外，用于电化学装置的电极的处理装置包括用于向这种电极前体提供锂的锂提供部分和用于在吸收锂之后测量电极前体的电阻的第一测量部分。

公开(公告)号：US20110020536A1

公开(公告)日：2011-01-27

申请号：US12934200

申请日：2009-03-26

申请人： Taisuke Yamamoto ,  Kazuyoshi Honda ,  Hideharu Takezawa

发明人： Taisuke Yamamoto ,  Kazuyoshi Honda ,  Hideharu Takezawa

IPC分类号： B05D5/12 ,  H01M4/02 ,  H01M4/04

CPC分类号： H01M10/0525 ,  H01M4/139 ,  H01M4/483 ,  Y02T10/7011

摘要： A production method of an electrode for a lithium-ion secondary battery includes: (A) a step of providing a current collector 11 having a plurality of bumps 12 on a surface thereof; (B) a step of allowing an evaporated source material to strike from a direction E which is tilted with respect to the normal of the surface of the current collector 11 to form a corresponding plurality of pillar-like members 14 on the plurality of bumps 12; and (C) a step of oxidizing the plurality of pillar-like members 14 to form a plurality of active material members 18 containing an oxide of the source material.

摘要翻译： 锂离子二次电池用电极的制造方法包括：（A）在其表面上设置具有多个凸块12的集电体11的工序; （B）允许蒸发的源材料从相对于集电体11的表面的法线倾斜的方向E撞击以在多个凸块12上形成相应的多个柱状构件14的步骤 ; 和（C）氧化多个柱状构件14以形成含有源材料的氧化物的多个活性物质构件18的工序。

公开(公告)号：US20100320080A1

公开(公告)日：2010-12-23

申请号：US12601661

申请日：2008-05-15

申请人： Hideharu Takezawa ,  Shoichi Imashiku ,  Kaoru Nagata ,  Takashi Otsuka

发明人： Hideharu Takezawa ,  Shoichi Imashiku ,  Kaoru Nagata ,  Takashi Otsuka

IPC分类号： H01M4/13 ,  C25B11/00

CPC分类号： H01G9/058 ,  H01G9/016 ,  H01G11/26 ,  H01G11/28 ,  H01G11/50 ,  H01G11/70 ,  H01G11/86 ,  H01M4/134 ,  H01M4/48 ,  H01M4/70 ,  H01M10/052 ,  H01M10/0525 ,  Y02E60/13

摘要： An electrode for an electrochemical element reversibly absorbing and releasing lithium ions including: a current collector having a higher first convex portion and a lower second convex portion on at least one surface thereof; a columnar body including an active material formed in such a manner as to rise obliquely on the first convex portion and the second convex portion of the current collector.

摘要翻译： 一种用于可逆地吸收和释放锂离子的电化学元件的电极，包括：在其至少一个表面上具有较高的第一凸部和下第二凸部的集电器; 柱状体，其包括以倾斜地上升于集电体的第一凸部和第二凸部的方式形成的活性物质。

公开(公告)号：US07736808B2

公开(公告)日：2010-06-15

申请号：US12162876

申请日：2007-01-26

申请人： Hideharu Takezawa

发明人： Hideharu Takezawa

IPC分类号： H01M4/58

CPC分类号： H01M10/0568 ,  H01M4/587 ,  H01M6/162 ,  H01M6/166 ,  H01M10/0566 ,  H01M2004/027

摘要： A non-aqueous electrolyte secondary battery of the present invention includes a positive electrode including a positive electrode material mixture, a negative electrode including a negative electrode material mixture, and a non-aqueous electrolyte including a non-aqueous solvent and a first lithium salt and a second lithium salt dissolved in the non-aqueous solvent. The negative electrode material mixture includes a material capable of absorbing and desorbing lithium ions, and carbon nanofibers. The material capable of absorbing and desorbing lithium ions has a ratio A/B of a volume A in a charged state to a volume B in a discharged state of 1.2 or more. The first lithium salt is at least one selected from the group consisting of LiBF4 and LiB(C2O4)2. The second lithium salt is a salt other than the first lithium salt. The first lithium salt is included in the non-aqueous electrolyte at a weight ratio of 10−4 or more relative to the carbon nanofibers. The first lithium salt included in the non-aqueous electrolyte has a concentration of 0.05 mol/dm3 or less.

摘要翻译： 本发明的非水电解质二次电池包括正极，包括正极材料混合物，负极包括负极材料混合物，非水电解质包括非水溶剂和第一锂盐，以及 溶解在非水溶剂中的第二锂盐。 负极材料混合物包括能够吸收和解吸锂离子的材料和碳纳米纤维。 能够吸收和解吸锂离子的材料在放电状态下的充电状态下的体积A与放电状态的体积B的比A / B为1.2以上。 第一锂盐是选自LiBF 4和LiB（C 2 O 4）2中的至少一种。 第二锂盐是第一锂盐以外的盐。 第一种锂盐以相对于碳纳米纤维为10-4或更大的重量比包含在非水电解质中。 包含在非水电解质中的第一锂盐的浓度为0.05mol / dm 3以下。

公开(公告)号：US20100136393A1

公开(公告)日：2010-06-03

申请号：US12595001

申请日：2008-07-17

申请人： Hideharu Takezawa ,  Masato Fujikawa ,  Miyiki Nakai ,  Shinji Kasamatsu ,  Tomohiko Yokoyama

发明人： Hideharu Takezawa ,  Masato Fujikawa ,  Miyiki Nakai ,  Shinji Kasamatsu ,  Tomohiko Yokoyama

IPC分类号： H01M6/10 ,  H01M4/58 ,  H01M4/00

CPC分类号： H01M10/0525 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/021

摘要： In a lithium ion secondary battery, a lithium-nickel-containing composite oxide that contains lithium and nickel is used as a positive electrode active material, and a negative electrode active material having a melting temperature of 1200° C. or less in a lithium-absorbed state is included in a negative electrode active material layer. By configuring as above, in the lithium ion secondary battery, it is possible to achieve higher capacity, higher output, and longer life, as well as further improved safety, and particularly in a nail penetration test, to suppress the heat generation due to internal short circuit and to reliably prevent the occurrence of thermal runaway.

摘要翻译： 在锂离子二次电池中，使用含有锂和镍的含锂镍复合氧化物作为正极活性物质，在锂离子二次电池中使用熔融温度为1200℃以下的负极活性物质， 吸收状态包括在负极活性物质层中。 通过如上构造，在锂离子二次电池中，可以实现更高的容量，更高的输出和更长的寿命，以及进一步提高安全性，特别是在钉子穿透试验中，抑制由内部产生的发热 短路并可靠地防止热失控的发生。

公开(公告)号：US20100112451A1

公开(公告)日：2010-05-06

申请号：US12444634

申请日：2007-10-09

申请人： Satoshi Shibutani ,  Hideharu Takezawa ,  Kazuyoshi Honda ,  Toshitada Sato

发明人： Satoshi Shibutani ,  Hideharu Takezawa ,  Kazuyoshi Honda ,  Toshitada Sato

IPC分类号： H01M4/58

CPC分类号： H01M4/02 ,  H01M4/134 ,  H01M10/052 ,  H01M2004/021 ,  H01M2004/027

摘要： A negative electrode 100 for a nonaqueous electrolytic secondary cell includes a current collector 1 and a plurality of active material bodies 2 formed on a surface of the current collector 1 at intervals; each active material body 2 contains a material for occluding or releasing lithium; and a plurality of projections 3 are formed on a part of a side surface of each active material body 2.

摘要翻译： 非水电解质二次电池用负极100包括：集电体1和间隔地形成在集电体1的表面上的多个活性物质体2; 每个活性材料体2含有用于吸留或释放锂的材料; 在活性物质2的侧面的一部分上形成有多个突起3。

公开(公告)号：US20090155686A1

公开(公告)日：2009-06-18

申请号：US12096966

申请日：2006-12-11

申请人： Hideharu Takezawa

发明人： Hideharu Takezawa

IPC分类号： H01M4/60

CPC分类号： H01M4/133 ,  H01M4/131 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/386 ,  H01M4/387 ,  H01M4/62 ,  H01M4/622 ,  H01M4/625 ,  H01M10/0525 ,  H01M10/0567

摘要： A non-aqueous electrolyte secondary battery of this invention includes a positive electrode including a positive electrode mixture, a negative electrode including a negative electrode mixture, and a non-aqueous electrolyte. The negative electrode mixture includes a material capable of absorbing and desorbing Li and a carbon material. The material capable of absorbing and desorbing Li includes at least one element selected from the group consisting of Si and Sn, and the amount of the carbon material is 3 to 60% by weight of the negative electrode mixture. At least one of the positive electrode, the negative electrode, and the non-aqueous electrolyte contains a lithium perfluoroalkylsulfonyl imide represented by the following general formula (1): LiN(CmF2m+1SO2)(CnF2n+1SO2)  (1) where m and n each represent an integer of 1 to 5 and may be m=n. The ratio of the weight of the lithium perfluoroalkylsulfonyl imide to the weight of the carbon material is 10−3 to 10.

摘要翻译： 本发明的非水电解质二次电池包括正极，包括正极混合物，负极包括负极混合物和非水电解质。 负极混合物包括能够吸收和解吸Li和碳材料的材料。 能够吸收和解吸Li的材料包括选自由Si和Sn组成的组中的至少一种元素，并且碳材料的量为负极混合物的3至60重量％。 正极，负极和非水电解质中的至少一方含有由以下通式（1）表示的全氟烷基磺酰亚胺锂：<？in-line-formula description =“In-line formula”end = “铅”→LiN（CmF2m + 1SO2）（CnF2n + 1SO2）（1）<？in-line-formula description =“In-line Formulas”end =“tail”？>其中m和n各自表示 1〜5，m = n。 全氟烷基磺酰亚胺锂的重量与碳材料重量的比例为10-3至10。

公开(公告)号：US20090042097A1

公开(公告)日：2009-02-12

申请号：US12187736

申请日：2008-08-07

申请人： Masato Fujikawa ,  Hideharu Takezawa ,  Shinji Kasamatsu ,  Tomohiko Yokoyama

发明人： Masato Fujikawa ,  Hideharu Takezawa ,  Shinji Kasamatsu ,  Tomohiko Yokoyama

IPC分类号： H01M4/02 ,  H01M10/00

CPC分类号： H01M4/139 ,  H01M4/0421 ,  H01M4/131 ,  H01M4/134 ,  H01M4/136 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/1397 ,  H01M4/70 ,  H01M10/052 ,  H01M10/0585

摘要： A lithium ion secondary battery includes a negative electrode that is shaped like waves in a section in the thickness direction. In the negative electrode, the ratio t1/t0 of the largest thickness t1 to the smallest thickness t0 is from 1.2 to 3.0. The negative electrode includes a thin-film negative electrode active material layer in which the ratio A/B of the volume A in a charged state to the volume B in a discharged state is 1.2 or more. The lithium ion secondary battery has high capacity, high power, long life, and improved safety. In particular, heat generation due to an internal short-circuit is significantly suppressed in a nail penetration test.

摘要翻译： 锂离子二次电池包括沿厚度方向的截面形状为波浪状的负极。 在负极中，最大厚度t1与最小厚度t0的比t1 / t0为1.2〜3.0。 负极包括薄膜负极活性物质层，其中处于放电状态的体积A与放电状态的体积B的比例A / B为1.2以上。 锂离子二次电池容量大，功率大，寿命长，安全性好。 特别地，在钉子穿透试验中，由于内部短路引起的发热被显着抑制。