Title:
負極活物質及びリチウムイオン二次電池
Document Type and Number:
Japanese Patent JP7375424
Kind Code:
B2
Abstract:
To provide a novel negative electrode active material having an appropriate charge/discharge potential of Li ions, a relatively high capacity, and a relatively long cycle life, and a lithium ion secondary battery using the same.SOLUTION: A negative electrode active material is formed of an oxide containing Fe and a metal element other than Fe, has an occlusion/release ability of Li ions, and has a charge/discharge potential of Li ions which is more than 0 V and less than 1.5 V. The oxide preferably contains a composition represented by (Ca1-xSrx)Ba(Fe4-yMy)O8 (M is one or more elements selected from the group consisting of Ti, Co, Ni, Cu, Zn, and Mn, 0≤x≤1, 0≤y≤0.6), or a composition represented by Y(Fe1-zM'z)O3 (M' is Mn and/or Co, 1≤z≤0.2). A lithium ion secondary battery is a secondary battery using such a negative electrode active material as a negative electrode.SELECTED DRAWING: Figure 1
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Inventors:
Nobuko Ohba
Grace Saeki
Shin Tajima
Grace Saeki
Shin Tajima
Application Number:
JP2019176753A
Publication Date:
November 08, 2023
Filing Date:
September 27, 2019
Export Citation:
Assignee:
Toyota Central R & D Labs.
International Classes:
H01M4/485; C01G49/00; H01M4/505; H01M4/525
Domestic Patent References:
| JP2010287526A | ||||
| JP2008084689A | ||||
| JP2003146739A | ||||
| JP2009158167A | ||||
| JP6163080A |
Foreign References:
| WO2010146776A1 | ||||
| WO2010146777A1 | ||||
| CN1709828A |
Attorney, Agent or Firm:
Fumio Hatakeyama
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