Positive active material, positive electrode and rechargeable lithium battery including same
AssigneeSamsung SDI Co., Ltd.
InventorsYuki Takei, Masatsugu Nakano
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Abstract
A positive active material for a rechargeable lithium battery is disclosed. The positive material includes including a lithium-manganese oxide-based solid solution including primary particles and secondary particles having a particle diameter (D50) in the range of about 1 μm to about 5 μm, a particle diameter (D90) in the range of less than about 8 μm, and a crystallite diameter of less than or equal to about 150 nm. The positive electrode for a rechargeable lithium battery includes the lithium manganese oxide-based solid solution is also disclosed.
Claims8
A positive active material for a rechargeable lithium battery comprising a lithium manganese oxide-based solid solution comprising
- a primary particle and a secondary particle,
- wherein the primary particles are agglomerated and form the secondary particles,
- wherein a particle diameter (D50) of the secondary particle is in the range of about 1 μm to less than 5 μm,
- a particle diameter (D90) of the secondary particle is less than about 8 μm, and
- a crystallite diameter as measured by the Scherrer equation is less than or equal to about 150 nm;
- and
- wherein the particle diameter (D50) of the secondary particle and the particle diameter (D90) of the secondary particle have a relationship satisfying the following Equation 1:
- 0.7≦(D90-D10)/D50≦1.3.
Dependencies are inferred from the claim text.