公开(公告)号：US20230112744A1

公开(公告)日：2023-04-13

申请号：US17913739

申请日：2022-01-07

Applicant: TDK CORPORATION

Inventor： Tomohiko HASEGAWA ,  Kosuke SATO ,  Hiroki KARISYUKU ,  Takashi MORI

IPC: H01M4/62 ,  H01M4/525 ,  H01M10/0525 ,  C01G49/00

Abstract: A lithium iron complex oxide is represented by Li5FeO4, two peaks with different quadrupole splitting values (QS) analyzed using 57Fe Mössbauer spectroscopy are shown, one of the two peaks, a peak A, satisfies QS>0, and the other one of the two peaks, a peak B, satisfies QS=0.

公开(公告)号：US20210305563A1

公开(公告)日：2021-09-30

申请号：US17211959

申请日：2021-03-25

Applicant: TDK CORPORATION

Inventor： Keitaro OTSUKI ,  Akinobu NOJIMA ,  Tomohiko HASEGAWA

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/505

Abstract: An electrode and a lithium ion secondary battery having excellent cycle characteristics in a high temperature environment are provided. An electrode includes: an active material layer including an active material, a conductive assistant, and a binder, wherein the active material contains active material particles containing a lithium transition metal oxide as a main component, and the active material particles each include a core part having a space group of R-3m and a covering part having a space group of Fm-3m configured to cover at least part of an outer circumferential portion of the core part.

公开(公告)号：US20170062811A1

公开(公告)日：2017-03-02

申请号：US14960964

申请日：2015-12-07

Applicant: TDK CORPORATION

Inventor： Masahiro TSUCHIYA ,  Tomohiko HASEGAWA ,  Yuji YAMAMOTO ,  Kazuma AKIMOTO

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

CPC classification number: H01M4/366 ,  H01M4/38 ,  H01M4/382 ,  H01M4/62 ,  H01M8/0637 ,  H01M10/0525

Abstract: Stabilized lithium powder according to an embodiment of this disclosure contains lithium particles and transition metal. Each lithium particle has a stabilized film on a surface thereof; the stabilized film contains an inorganic compound; and main transition metal, which is contained the most in the transition metal, is contained by 0.5×10−3 wt % or more and 11.5×10−3 wt % or less.

Abstract translation: 根据本公开实施方案的稳定的锂粉末含有锂颗粒和过渡金属。 每个锂颗粒在其表面上具有稳定的膜; 稳定膜含有无机化合物; 在过渡金属中含有最多的主过渡金属的含量为0.5×10 -3重量％以上且11.5×10 -3重量％以下。

公开(公告)号：US20180241041A1

公开(公告)日：2018-08-23

申请号：US15892499

申请日：2018-02-09

Applicant: TDK CORPORATION

Inventor： Tomohiko HASEGAWA

IPC: H01M4/58 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/36 ,  H01M4/525

CPC classification number: H01M4/5825 ,  H01M4/364 ,  H01M4/525 ,  H01M4/587 ,  H01M4/623 ,  H01M4/625 ,  H01M4/661 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/4235 ,  H01M2004/028 ,  H01M2220/30 ,  H01M2300/0037

Abstract: A lithium ion secondary battery includes: a positive electrode; a negative electrode; a separator positioned between the positive electrode and the negative electrode; and an electrolyte. The positive electrode includes a lithium vanadium compound expressed by Lia(M)b(PO4)c(where M=VO or V, and 0.9≤a≤3.3, 0.9 ≤b≤2.2, and 0.9≤e≤3.3), and the electrolyte includes an additive selected from monofluorophosphate salts and difluorophosphate salts.

公开(公告)号：US20160099467A1

公开(公告)日：2016-04-07

申请号：US14874983

申请日：2015-10-05

Applicant: TDK CORPORATION

Inventor： Tomohiko HASEGAWA ,  Masahiro TSUCHIYA ,  Atsushi SANO

IPC: H01M4/38 ,  H01M10/0525

CPC classification number: H01M4/382 ,  H01M4/1391 ,  H01M4/366 ,  H01M4/62 ,  H01M10/0525 ,  Y02T10/7011

Abstract: Stabilized lithium powder according to an embodiment of this disclosure includes powder particles satisfying a relation of C≦0.90, where C represents average circularity of the powder particles. And a lithium secondary battery according to an embodiment of this disclosure comprises a negative electrode doped with lithium from the stabilized lithium powder for a lithium ion second battery according to an embodiment of this disclosure, a positive electrode, and an electrolyte.

Abstract translation: 根据本发明的一个实施方案的稳定的锂粉末包括满足C＆lt; NlE; 0.90的关系的粉末颗粒，其中C代表粉末颗粒的平均圆形度。 根据本公开的实施方式的锂二次电池包括从根据本公开的实施方案的锂离子二次电池的稳定化锂粉末中掺入锂的负极，正极和电解质。

公开(公告)号：US20160099465A1

公开(公告)日：2016-04-07

申请号：US14874875

申请日：2015-10-05

Applicant: TDK CORPORATION

Inventor： Masahiro TSUCHIYA ,  Tomohiko HASEGAWA ,  Kazuya KAI ,  Atsushi SANO

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

CPC classification number: H01M4/366 ,  H01M4/382 ,  H01M4/483 ,  H01M10/052 ,  H01M2004/027 ,  Y02T10/7011

Abstract: Stabilized lithium powder according to an embodiment of this disclosure includes lithium particles. Each lithium particle includes an inorganic compound on a surface thereof, the inorganic compound contains lithium hydroxide, and the lithium hydroxide is contained by 2.0 wt % or less relative to the entire stabilized lithium powder.

Abstract translation: 根据本公开实施方案的稳定的锂粉末包括锂颗粒。 每个锂颗粒在其表面上包括无机化合物，无机化合物含有氢氧化锂，相对于整个稳定的锂粉末，氢氧化锂的含量为2.0重量％以下。

公开(公告)号：US20220311008A1

公开(公告)日：2022-09-29

申请号：US17703345

申请日：2022-03-24

Applicant: TDK CORPORATION

Inventor： Tomohiko HASEGAWA ,  Kosuke SATO ,  Hiroki KARISYUKU ,  Tomohide SHIRANE ,  Takashi MORI

IPC: H01M4/62 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/485

Abstract: The lithium ion secondary battery includes: a positive electrode; a negative electrode; a separator disposed between the positive electrode and the negative electrode; and an electrolytic solution, in which the positive electrode has a metal foil and a positive electrode active material layer provided on the metal foil, a plurality of voids are formed on the positive electrode active material layer, and a transition metal oxide having an average particle size of 10 nm or more and 500 nm or less is provided on an inner wall portion of the voids, on which the voids and the electrolytic solution are in contact with each other.

公开(公告)号：US20180241085A1

公开(公告)日：2018-08-23

申请号：US15892820

申请日：2018-02-09

Applicant: TDK CORPORATION

Inventor： Tomohiko HASEGAWA

IPC: H01M10/0567 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M4/525 ,  H01M4/587 ,  H01M4/623 ,  H01M4/661 ,  H01M10/052 ,  H01M10/0525 ,  H01M2220/30 ,  H01M2300/0037

Abstract: A nonaqueous electrolytic solution contains an additive selected from monofluorophosphate salts or difluorophosphate salts, and a Group 5 element. In the nonaqueous electrolytic solution, the Group 5 element may have a content in a range of 1×10−6 to 3×10−3 mol/L. The Group 5 element may be vanadium.