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。

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。