Title:
正極活物質の製造方法、及びリチウムイオン電池の製造方法
Document Type and Number:
Japanese Patent JP7127631
Kind Code:
B2
Abstract:
A main object is to provide a method of producing a cathode active material having a high average discharge potential, and a high degree of stability at high potential. A step of preparing a Na-doped precursor of making a transition metal oxide having a P2 structure belonging to a space group of P63/mmc; and an ion exchange step of substituting lithium for at least part of sodium contained in the transition metal oxide by an ion exchange method are included, wherein the transition metal oxide has the composition represented by NaaMnx-pNiy-qCoz-rM1p+q+rO2, where 0.5≤a≤1, x+y+z=1, 3≤4x+2y+3z≤3.5, and 0.05≤p+q+r<0.25, M1 is Al or Mo, when M1 is Al, p is not equal to q, and any one of p and q is not 0.
Inventors:
Issei Sugiyama
Application Number:
JP2019192306A
Publication Date:
August 30, 2022
Filing Date:
October 21, 2019
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
H01M4/505; C01G53/00; H01M4/525; H01M10/052; H01M10/0562
Domestic Patent References:
| JP2010129509A |
Foreign References:
| WO2015049796A1 |
Attorney, Agent or Firm:
Noriaki Yamamoto
Akihiko Yamashita
Tatsuto Kishimoto
Akihiko Yamashita
Tatsuto Kishimoto