公开(公告)号：US20150093633A1

公开(公告)日：2015-04-02

申请号：US14502314

申请日：2014-09-30

Applicant: TDK CORPORATION

Inventor： Hiroyuki MIYABARA ,  Hiroki KITAMURA ,  Yukiko HIRABAYASHI ,  Masaki SOBU ,  Tetsuo TAKAISHI

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/62

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/525 ,  H01M4/625 ,  H01M10/0525 ,  Y02E60/122

Abstract: A lithium ion secondary battery with a high electrode density and an excellent rate discharge characteristic. The positive electrode includes a positive electrode active material of a compound represented by Lia(NixCoyAl1−x−y)O2 (0.95:≦a≦1.05, 0.5≦x≦0.9, 0.05≦y≦0.2), and carbon adhered to the surface of the material, in the Raman spectrum using a laser of 532 nm, the positive electrode includes a peak PA (D band) at 1200˜1450 cm−1, a peak PB (G band) at 1450˜1700 cm−1 and a peak PC at 400˜600 cm−1, and when the intensities are normalized by regarding the maximum intensity as 1 and the minimum intensity as 0 in the wavenumber domain of 200˜1800 cm−1, Raman intensity of the minimum (V band) between the two peaks of said peak PA and said peak PB is 0.6 or less, and Raman intensity of said peak PC is 0.1 or more and 0.5 or less.

Abstract translation: 具有高电极密度和优异的放电特性的锂离子二次电池。 该正极包括由LiI（NixCoyAl1-x-y）O 2（0.95：＆amp; NlE; a＆nlE; 1.05,0.5＆amp; nlE; x＆nlE; 0.9,0.05＆amp; nlE; y＆nlE; 0.2）表示的化合物的正极活性物质， 在使用532nm的激光的拉曼光谱中，在1200〜1450cm -1的峰值PA（D带），1450〜1700cm -1的峰值PB（G带） 1和400〜600cm -1的峰值PC，并且当在200〜1800cm -1的波数域中通过将最大强度为1和最小强度为0来对强度进行归一化时，最小的拉曼强度（ V波段）在所述峰值PA和所述峰值PB之间的两个峰值之间为0.6以下，所述峰值PC的拉曼强度为0.1以上且0.5以下。

公开(公告)号：US20160211509A1

公开(公告)日：2016-07-21

申请号：US14913484

申请日：2014-09-26

Applicant: TDK CORPORATION

Inventor： Yasuhiro IKEDA ,  Atsushi SANO ,  Masaki SOBU ,  Akinobu NOJIMA

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/48 ,  H01M4/38 ,  H01M4/134 ,  H01M4/131

CPC classification number: H01M4/364 ,  H01M4/13 ,  H01M4/131 ,  H01M4/134 ,  H01M4/386 ,  H01M4/483 ,  H01M4/485 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2220/30

Abstract: Provided are a negative electrode active material for a lithium ion secondary battery, which has sufficiently high discharge capacity at a high rate. The negative electrode active material containing silicon and silicon oxide includes primary particles having two phases of different compositions therein. One of the two phases has a higher silicon element concentration than the other phase, and is a fibrous phase forming a network structure in a cross section of the primary particle. Use of the negative electrode active material enables a sufficient increase in discharge capacity at a high rate.

Abstract translation: 提供一种用于锂离子二次电池的负极活性物质，其具有足够高的放电容量。 含有硅和氧化硅的负极活性物质包括其中具有不同组成的两相的一次粒子。 两相之一的硅元素浓度高于另一相，并且是在初级粒子的横截面中形成网状结构的纤维相。 使用负极活性物质能够以高速率充分提高放电容量。

公开(公告)号：US20140170496A1

公开(公告)日：2014-06-19

申请号：US14109533

申请日：2013-12-17

Applicant: TDK CORPORATION

Inventor： Hideaki SEKI ,  Atsushi SANO ,  Masaki SOBU ,  Tomoshi NAKAMOTO

IPC: H01M4/58

CPC classification number: H01M4/5825 ,  C01B25/45 ,  H01M10/052

Abstract: A positive electrode active material contains a compound represented by a chemical formula LiVOPO4. A crystal system of the compound is an orthorhombic system, and the amount of tetravalent V of the compound is 27.7 mass % or more and 28.2 mass % or less.

Abstract translation: 正极活性物质含有由化学式LiVOPO4表示的化合物。 化合物的晶体系是斜方晶系，化合物的四价V的量为27.7质量％以上至28.2质量％以下。

公开(公告)号：US20160211510A1

公开(公告)日：2016-07-21

申请号：US14913516

申请日：2014-09-26

Applicant: TDK CORPORATION

Inventor： Yasuhiro IKEDA ,  Atsushi SANO ,  Masaki SOBU ,  Akinobu NOJIMA

IPC: H01M4/36 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/48

CPC classification number: H01M4/364 ,  H01M4/386 ,  H01M4/483 ,  H01M4/485 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative electrode active material is provided for a lithium ion secondary battery having high initial charging/discharging efficiency. The negative electrode active material containing silicon and silicon oxide has two phases with different compositions therein. One of the two phases has a lower silicon element concentration than the other phase, and is a fibrous phase forming a network structure in a cross section of primary particle of the negative electrode active material. Use of the negative electrode active material enables a sufficient increase in initial charging/discharging efficiency.

Abstract translation: 为具有高初始充放电效率的锂离子二次电池提供负极活性物质。 含有硅和氧化硅的负极活性物质具有不同组成的两相。 两相中的一个相对于其他相具有较低的硅元素浓度，并且是在负极活性物质的一次粒子的截面中形成网状结构的纤维状相。 使用负极活性物质能够充分提高初始充放电效率。

公开(公告)号：US20160190560A1

公开(公告)日：2016-06-30

申请号：US14908896

申请日：2014-09-26

Applicant: TDK CORPORATION

Inventor： Yasuhiro IKEDA ,  Atsushi SANO ,  Masaki SOBU ,  Akinobu NOJIMA

IPC: H01M4/36 ,  H01M4/48 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/131 ,  H01M4/38 ,  H01M4/62

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/134 ,  H01M4/364 ,  H01M4/386 ,  H01M4/48 ,  H01M4/483 ,  H01M4/485 ,  H01M4/622 ,  H01M4/625 ,  H01M10/052 ,  H01M10/0525 ,  H01M2220/20 ,  H01M2220/30 ,  Y02T10/7011

Abstract: A negative electrode active material with sufficiently high discharge capacity at a high rate, and a negative electrode and a lithium ion secondary battery using the negative electrode active material. A negative electrode active material according to the invention includes a negative electrode active material particle containing silicon and silicon oxide, wherein a surface layer part of the negative electrode active material particle is a layer with lower density than a core part of the negative electrode active material particle. With such a structure of the negative electrode active material, the sufficiently high discharge capacity at a high rate can be obtained.

Abstract translation: 具有高放电容量的负极活性物质和使用负极活性物质的负极和锂离子二次电池。 根据本发明的负极活性物质包括含有硅和氧化硅的负极活性物质颗粒，其中负极活性物质颗粒的表面层部分是比负极活性物质的核心部分低的密度层 粒子。 通过这样的负极活性物质的结构，可以得到高速率的充分高放电容量。

公开(公告)号：US20130256591A1

公开(公告)日：2013-10-03

申请号：US13845836

申请日：2013-03-18

Applicant: TDK CORPORATION

Inventor： Yasuhiro IKEDA ,  Atsushi SANO ,  Masaki SOBU ,  Tetsuo TAKAISHI

IPC: H01M4/48

CPC classification number: H01M4/48

Abstract: A negative electrode active material mainly contains silicon and silicon oxide. In the negative electrode active material, an Ar-laser Raman spectrum thereof includes a peak A corresponding to 950±30 cm−1 and a peak B corresponding to 480±30 cm−1, and an intensity ratio of the peak B to the peak A (B/A) is in the range of 1 to 10.

Abstract translation: 负极活性物质主要含有硅和氧化硅。 在负极活性物质中，其Ar激光拉曼光谱包括对应于950±30cm -1的峰A和对应于480±30cm -1的峰B，峰B与峰的强度比 A（B / A）在1到10的范围内。