Lithium transition metal oxide, positive electrode additive for lithium secondary battery, and lithium secondary battery comprising the same
AssigneeLG Chem, Ltd.
InventorsJongmin Roh, Seokhyun Yoon, Yoon Jae Lee, Donghoon Suh
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Abstract
A lithium transition metal oxide capable of minimizing a side reaction with an electrolyte, thereby suppressing the generation of gas during charging and discharging of a lithium secondary battery is provided. A lithium transition metal oxide is represented by Chemical Formula 1, wherein a lattice parameter of a unit lattice satisfies Equations 1 and 2. A positive electrode additive for a lithium secondary battery, and a lithium secondary battery are also provided.
Claims13
A lithium transition metal oxide represented by the following Chemical Formula 1, wherein a lattice parameter of a unit lattice satisfies the following Equations 1 and 2:
- wherein,
- M is at least one element selected from the group consisting of Zn, Al and Mg, and
- x is 0.1 to 0.7;
- 6.532
- Å
- ≤
- a
- =
- b
- ≤
- 6.544
- Å
- [
- Equation
-
- 1
- ]
- 4.6493
- Å
- ≤
- c
- ≤
- 4.6533
- Å
- [
- Equation
-
- 2
- ]
- in Equations 1 and 2,
- a, b and c are lattice parameters of the lithium transition metal oxide obtained by an XRD Rietveld refinement method using CuKα rays.
A positive electrode additive for a lithium secondary battery, comprising a lithium transition metal oxide represented by the following Chemical Formula 1, wherein a lattice parameter of a unit lattice satisfies the following Equations 1 and 2:
- wherein,
- M is at least one element selected from the group consisting of Zn, Al and Mg, and
- x is 0.1 to 0.7;
- 6.532
- Å
- ≤
- a
- =
- b
- ≤
- 6.544
- Å
- [
- Equation
-
- 1
- ]
- 4.6493
- Å
- ≤
- c
- ≤
- 4.6533
- Å
- [
- Equation
-
- 2
- ]
- in Equations 1 and 2,
- a, b and c are lattice parameters of the lithium transition metal oxide obtained by an XRD Rietveld refinement method using CuKα rays.
Dependencies are inferred from the claim text.