Precursor particle for preparation of cathode active material for secondary battery and novel precursor powder containing same
AssigneeL&F Co., Ltd.
InventorsSung Kyun Chang, Sang Hoon Jeon, Sunhong Park, Doe Hyoung Kim
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Abstract
Disclosed are novel precursor particles for preparing a cathode active material including transition metal precursor particles containing one or more transition metals, and one or more of an alkali metal and an alkaline earth metal, wherein the alkali metal and the alkaline earth metal are contained in one or more of inner and outer parts of the transition metal precursor particles, and a novel precursor powder including the novel precursor particles.
Claims18
A novel precursor particle for preparing a cathode active material comprising:
- a transition metal precursor particle containing one or more transition metals;
- and
- one or more of an alkali metal and an alkaline earth metal,
- wherein the alkali metal and the alkaline earth metal are contained in one or more of inner and outer parts of the transition metal precursor particle, and
- the novel precursor particle has a composition represented by the following Formula 1:
- [(1-x-y)A2CO3*xAOH*yA2O]/[(1-a-b)M(OH)2*aMOOH*bM(OH1-c)2] (1)
- wherein
- 0<x<1, 0<y<1, 0<a<1, 0<b<1, 0<c<1;
- A/M (molar ratio)>0;
- A is at least one alkali metal and/or alkaline earth metal;
- and
- M comprises one or more transition metals stable in a tetracoordinate or hexacoordinate structure.
A novel precursor particle for preparing a cathode active material comprising:
- a transition metal precursor particle containing one or more transition metals;
- and
- one or more of an alkali metal and an alkaline earth metal,
- wherein the alkali metal and the alkaline earth metal are contained in one or more of inner and outer parts of the transition metal precursor particle, and
- the novel precursor particle has a composition of the following Formula 2:
- [(1-x-y)A2CO3*xAOH*yA2O]/MO2-a (2)
- wherein
- 0<x<1, 0<y<1, 0<a<1;
- A/M (molar ratio)>0;
- A is at least one alkali metal and/or alkaline earth metal;
- and
- M comprises one or more transition metals stable in a tetracoordinate or hexacoordinate structure.
Dependencies are inferred from the claim text.