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：US20180287146A1

公开(公告)日：2018-10-04

申请号：US15939882

申请日：2018-03-29

Applicant: TDK CORPORATION

Inventor： Hisashi SUZUKI ,  Yuji YAMAMOTO ,  Naoki KUBOTA ,  Yukiko HIRABAYASHI

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M4/58 ,  H01M10/0525

Abstract: A lithium powder includes: a core of metallic lithium; and a coating layer coating a surface of at least a part of the core. The coating layer contains lithium carbonate including a surface in at least a part of which lithium oxide is present. The coating layer may include a first coating film layer present in at least a part of the core, and a second coating film layer present in a surface of the first coating film layer. The first coating film layer may contain lithium carbide. The second coating film layer may contain lithium carbonate.

公开(公告)号：US20250096372A1

公开(公告)日：2025-03-20

申请号：US18727780

申请日：2022-12-19

Applicant: TDK CORPORATION

Inventor： Akinobu NOJIMA ,  Shinya WATANABE ,  Yukiko HIRABAYASHI

IPC: H01M50/109 ,  H01M50/153 ,  H01M50/186

Abstract: This battery includes: an electrical storage element with positive and negative electrodes and insulating film between the positive and negative electrodes and electrically separates the positive and negative electrodes; and an airtight case housing the electrical storage element, wherein the case includes: a first member having bottom and tubular portions; a second member having a lid-like portion covering an opening of the first member and a surrounding wall portion covering the tubular portion from an outside; and a gasket between an end face of the first member and the second member and between the tubular portion and the second member, and wherein a non-contact portion with which the gasket is not in contact is provided in either one or both of a part of a first surface of the first member that faces the gasket and a part of a second surface of the second member that faces the gasket.