Active material, electrode, battery, and method of manufacturing active material
AssigneeTDK Corporation
InventorTadashi Suzuki
Life of this patent
Estimating the term…
Abstract
An active material comprises a core particle containing LiCo(1-x)MxO2 and/or Li(Mn(1-y)My)2O4, and a coating part covering at least part of a surface of the core particle, while the coating part contains LiVOPO4. Here, M is at least one element selected from the group consisting of Al, Mg, and transition elements, 0.95≧x≧0, 0.2≧y≧0, and V in LiVOPO4 may partly be substituted by at least one element selected from the group consisting of Ti, Ni, Co, Mn, Fe, Zr, Cu, Zn, and Yb.
Claims7
A positive active material comprising:
- a core particle containing LiCo(1-x)MxO2;
- and
- a coating part covering at least part of a surface of the core particle,
- wherein:
- the coating part contains LiV(1-a)MaOPO4,
- M in the LiCo(1-x)MxO2 is at least one element selected from the group consisting of Al, Mg, Ti, Cr, Mn, Fe, Co, Ni, Cu, and Zn,
- 0≦x≦0.95,
- M in the LiV(1-a)MaOPO4 may be at least one element selected from the group consisting of Ti, Ni, Co, Mn, Fe, Zr, Cu, Zn, and Yb, and
- 0≦a≦0.05.
A method of manufacturing a positive active material, the method comprising a step of causing at least part of a surface of a core particle containing LiCo(1-x)MxO2 to support LiV(1-a)MaOPO4,
- wherein:
- M in the LiCo(1-x)MxO2 is at least one element selected from the group consisting of Al, Mg, Ti, Cr, Mn, Fe, Co, Ni, Cu, and Zn,
- 0≦x≦0.95,
- M in the LiV(1-a)MaOPO4 may be at least one element selected from the group consisting of Ti, Ni, Co, Mn, Fe, Zr, Cu, Zn, and Yb, and
- 0≦a≦0.05.
Dependencies are inferred from the claim text.